SGSN Changes in
Release 14.0
This
chapter identifies features and functionality added to, modified
for, or deprecated from 14.0 SGSN software releases.
Topics covered in this
chapter are:
-
Omissions and Corrections
-
SGSN Feature Changes
as of May 31, 2013
-
SGSN Command Changes
as of May 31, 2013
-
SGSN Performance Indicator
Changes as of May 31, 2013
-
SGSN Feature Changes
as of January 31, 2013
-
SGSN Configuration
Management Changes as of January 31, 2013
-
SGSN Performance Management
Changes as of January 31, 2013
-
SGSN Security Management
Changes as of January 31, 2013
-
SGSN Feature Changes
as of December 21, 2012
-
SGSN Configuration
Management Changes as of December 21, 2012
-
SGSN Performance Management
Changes as of December 21, 2012
-
SGSN Security Management
Changes as of December 21, 2012
-
SGSN Feature Changes
as of November 30, 2012
-
SGSN Configuration
Management Changes as of November 30, 2012
-
SGSN Performance Management
Changes as of November 30, 2012
-
SGSN Security Management
Changes as of November 30, 2012
-
SGSN Feature Changes
as of November 7, 2012
-
SGSN Configuration
Management Changes as of November 7, 2012
-
SGSN Performance Management
Changes as of November 7, 2012
-
SGSN Security Management
Changes as of November 7, 2012
-
SGSN Feature Changes
as of September 28, 2012
-
SGSN Configuration
Management Changes as of September 28, 2012
-
SGSN Performance Management
Changes as of September 28, 2012
-
SGSN Security Management
Changes as of September 28, 2012
-
SGSN Feature Changes
as of July 31, 2012
-
SGSN Configuration Management
Changes as of July 31, 2012
-
SGSN Performance Management
Changes as of July 31, 2012
-
SGSN Security Management
Changes as of July 31, 2012
-
SGSN
Feature Changes as of June 29, 2012
-
SGSN
Configuration Management Changes as of June 29, 2012
-
SGSN
Performance Management Changes as of June 29, 2012
-
SGSN Security Management
Changes as of June 29, 2012
IMPORTANT:
Enhancements to Diameter,
GTPP, and RADIUS in release 14.0 are located in the Accounting Management
Changes chapter.
Enhancements to SNMP
MIB in release 14.0 are located in the SNMP MIB Changes chapter.
Enhancements to Web
Element Manager (WEM) in release 14.0 are located in the Web Element Manager
Changes chapter.
Omissions and Corrections
The following list
links to (1) content that was omitted from previous versions of
this document or to (2) content that was in error in previous versions
of this document.
Omissions from and
Corrections to November 7, 2012 Content
Omissions from and
Corrections to June 29, 2012 Content
SGSN Feature Changes
as of May 31, 2013
This section
provides information on SGSN feature changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the SGSN Administration
Guide for this release.
New SGSN Features
This section
identifies new SGSN features available in release 14.0.
Downlink Data Lockout
Timer
Currently, if paging
fails after maximum number of retries, the page proceed flag (PPF)
is cleared and further downlink data is dropped. The PPF is set
to ‘true’ if there is any uplink activity from
the UE.
The Downlink Data Lockout
Timer is a new, configurable timer added for both GPRS and SGSN
services to reduce the frequency of mobile-initiated keep alive
messages. If enabled, this timer starts whenever the paging procedure
fails after the maximum number of retransmissions and the Page Proceed
Flag (PPF) is cleared. If there is any downlink activity when the
lockout timer is running, the packets are dropped and the drop cause
is set as Page Failed. When the lockout timer expires, the PPF is
set to true and further downlink packets are queued and paging is re-initiated.
In order to avoid endless paging activity when there is no page
response or uplink activity from the UE, an optional configurable repeat count value
is used. If the repeat value is configured as 'y' then the lockout
timer is started 'y' number of times after page failure. The implementation
of the lockout timer is different for 2G/3G subscribers,
but the behavior is the same.
E-UTRAN Service
Handover Support
The SGSN supports configuration-based
enabling of the E-UTRAN Service Handover Information Element, which
is optional in the following RANAP messages used during SRNS relocation:
- RAB Assignment Request
- Relocation Request
This feature is useful
in the following scenarios:
- A UE is E-UTRAN capable,
the PLMN is E-UTRAN capable, but the UE has not subscribed to EPS
services (no 4G subscription available).
- The VPLMN is E-UTRAN-capable,
and the UE of an inbound roamer is E-UTRAN capable, but the UE has
only a UTRAN/GERAN roaming agreement in place.
The feature ensures
that an SRNS relocation handover to E-UTRAN is not allowed for E-UTRAN
capable UEs that have only a UTRAN/GERAN roaming agreement.
This results in an elimination of potential service denial or disruption
issues, and unnecessary signaling.
To implement this feature,
new CLI commands have been implemented so that the SGSN can be configured
to:
- Override the "eutran-not-allowed"
flag received from the HLR/HSS in the ISD/ULA request
for the Access Restriction Data (ARD) parameter (for scenario #2
above).
- Enable the inclusion
of the E-UTRAN Service Handover IE in RAB Assignment Request and
Relocation Request RANAP messages (for scenarios #1 and #2
above).
IMPORTANT:
SRNS relocation must
be configured via the srns-inter and/or srns-intra commands
in Call Control Profile
Configuration Mode before configuring E-UTRAN Service Handover
Support.
Gb Manager
A new SGSN proclet has
been developed. Now, all the link level procedures related to Gb
-
- protocol (GPRS-NS and
BSSGP) hosting, handling, administration, message distribution,
- keeping the other managers
informed about the link/remote-node status,
- handling functionality
of the Gb interface (all 2G signaling)
are removed from
the Link Manager and moved to the SGSN's new Gb Manager proclet.
The new Gb Manager provides
increased flexibility in handling link level procedures for each
access type independently and ensures scalability. The consequence
of relieving the Link Manager, of a large amount of message handling,
is to decrease delays in sending sscop STAT messages resulting in
the detection of link failure at the remote end. Use of this separate
new proclet to handle 2G signaling messages means there will not
be any MTP link fluctuation towards the RNS, which is seen during
the BSC restart or extension activity in the network. As well, this
improves the fluctuation towards the 3G connectivity.
Modified SGSN Features
This section
identifies SGSN features modified in release 14.0.
Check For UEs From
MME
Previous Behavior:
For UEs coming from MME (MSB of LAC is 1), the SGSN fails to send
a RAU reject and update the Session Disconnect Reasons, Statistics respectively.
New Behavior: The
SGSN behavior has now been modified to send a RAU reject and update
the Session Disconnect Reasons , Statistics respectively. If egtpc
is associated in gprs-service, the following checks for S4-SGSN
have been added:
- In pure S4 conditions,
the MSB set in the LAC bit specifies if the UE is coming from MME.
- In S4/Gn mixed
conditions, the guti db configuration is used to determine if the
UE is coming from MME as Gn SGSNs can have MSB set in LAC.
Clear Port Output
Updated
Previous Behavior:
Executing the command clear
port datalink counter all does not clear the DLCI level
statistics, only port level statistics are cleared.
New Behavior: Executing
the command clear
port datalink counter all now clears both DLCI level statistics
and port level statistics.
Custom10, Custom11
Dictionaries Value Of Fields Changed
Previous Behavior:
In custom10 and custom11 dictionaries, if the value of the fields
rNCUnsentDownlinkVolume/dataVolumeGPRSUplink/dataVolumeGPRSDownlink
is greater than 0x7fffffff, then an additional byte (00)is added
to make it five bytes.
New Behavior: In
custom10 and custom11 dictionaries, if the value of the fields rNCUnsentDownlinkVolume/dataVolumeGPRSUplink/dataVolumeGPRSDownlink
is greater than 0x7fffffff, an additional byte (00) is not encoded
at the beginning of the byte. This implies that the values of the
three fields will not go beyond four bytes.
Default Value Of “sctp-max-out-strms”
Previous Behavior: If
the value of "sctp-max-out-strms" is configured to less than "2",
the configured value is set to "sctp-max-out-strms" and a crash
occurs.
New Behavior: The
default value of "sctp-max-out-strms" is set to "2". If the user
tries to configure the value of "sctp-max-out-strms" less than
"2", a message is displayed and the default value of "2" is set
for "sctp-max-out-strms".
Extra Signalling
To GGSN And MS
Previous Behavior: During
a RNC initiated modification procedure if the GGSN downgrades QoS
and while updating the RNC with RAB modify request if a RAB modify
failure is received the GGSN and MS are not updated with the old
QoS information (QoS before the GGSN downgraded the QoS).
New Behavior: During
a RNC initiated modification procedure if the GGSN downgrades QoS
and while updating the RNC with RAB modify request if a RAB modify
failure is received the GGSN and MS are now updated with the old
QoS information (QoS before the GGSN downgraded the QoS).
Impact
Two extra messages
will be seen in this scenario one on Gn interface (Update PDP) and
one on the Iu interface (modify PDP).
GGSN-initiated
UPCQ
Previous Behavior: The
SGSN receives an UPCQ from GGSN when activation is in progress and
always sends an update PDP context response "no resources available"
cause code.
New Behavior: In
case of non-direct tunnel subscribers where the RNC does not downgrade
the QoS during activation, the GGSN initiated UPCQ is processed
by SGSN.
Gmm Reject Causes “11
- 15” Re-direct Indication
Previous Behavior:
For network-sharing cases of reject due to HLR, the SGSN sends re-direct
complete even if gmm reject causes are between 11-15.
New Behavior: When
gmm reject causes are between 11-15, the re-direct indication is
sent.
IMEI Time Out Cause
Feild Changed
Previous Behavior:
The cause field in RAU reject for IMEI time out is "Network Failure".
New Behavior: The
cause field in RAU reject for IMEI time out is now changed to "Implicit
Detach".
InTracer Invoke In
2G Is Disabled
Previous Behavior: InTracer
is invoked for both 2G and 3G calls.
New Behavior: InTracer
support is invoked only for 3G calls. InTracer support is not invoked
for 2G calls and unknown subscribers (for example, unrecognized
Transaction ID in case of TCAP continue message).
Impact
Customers network is
not flooded with the 2G call events to InTracer (IPMS).
License Control
for Prefer Subscription-Interface
Previous Behavior:
Previously, the prefer command,
in the Call Control Profile configuration mode, was controlled by
the basic SGSN license.
New Behavior: Use
of the prefer command
is now controlled by the feature-specific S6d license. Without the
S6d license, the command appears but is non-functional. The current subscription-interface keyword
only appears if the operator has an S6d license.
LinkMgr Uses Dedicated
DMA with NPU
Previous Behavior:
The LinkMgr communicated over default direct memory access (DMA)
channel to the NPU.
New Behavior: The
internal interface between the LinkMgr and the NPU has changed.
The LinkMgr now communicates over a dedicated DMA channel with the
NPU.
Customer Impact: Marginally
improves session setup time for higher attach and detach rates.
MME-FQDN For Peer
MME
Previous Behavior:
In DNS, RAI-FQDN is performed if the peer is MME.
New Behavior: In
DNS, MME-FQDN will be performed if the peer is MME.
MO SMS CDR Generation
Previous Behavior:
CDRs are generated when MO SMSes are dropped due to routing failure.
New Behavior: CDRs
are not generated when MO SMSes are dropped due to routing failure.
PGW PLMN-Id in
EPS Subscription Information
Previous Behavior:
PGW PLMN-Id field is not displayed in EPS subscription information
when the command show
subscribers gprs-only full all is executed.
New Behavior: PGW
PLMN-Id is now included in eps subscription information display.
S4-SGSN DP Structure
Memory Usage Statistics
Previous Behavior:
No statistics are available to track S4-SGSN data path related data
structure memory usage.
New Behavior: New
statistics are added to the show CLI command show sgsn sessmgr instance
< > memory statistics to display S4-SGSN data path
structure memory usage statistics.
S4-SGSN Support
For SRNS
Previous Behavior:
The S4-SGSN supports peer SGSN/MME configuration only for
RAUs.
New Behavior: The
S4-SGSN now supports peer SGSN/MME configuration for RAUs
and SRNS.
Severity Level
For “starSGSNRMMemWarn”
Previous Behavior: The
old "starent.my" file incorrectly displays the SEVERITY level as
"INFORMATIONAL" for "starSGSNRMMemWarn" (trap code 1217).
New Behavior: The
new "starent.my" file now correctly displays the SEVERITY level
as "WARNING" for "starSGSNRMMemWarn" (trap code 1217).
Impact: The correct
SEVERITY level for "starSGSNRMMemWarn" trap is now displayed.
SGSN Context Transfer
From MME
Previous Behavior:
In certain scenarios, post LTE to 2G RAU, several RAUs from UE do
not receive response from SGSN. The SGSN does not perform a context
transfer from MME.
New Behavior: The
SGSN now performs a context transfer from MME.
SGTP-Service Cannot
Be Shared Between MME and SGSN
Previous Behavior: There
was no note in the documentation to indicate an association limit
for the SGTP service in regard to co-located services.
New Behavior: The
following is the note that has been added to the documentation for
SGSN and GPRS service configuration to limit association of SGTP
services: “When using the associate command
in GPRS Service configuration mode or SGSN Service configuration
mode, only one SGTP service can be associated with a single service
definition. If co-located, the GPRS and SGSN services can share the
same SGTP service association or they can have different SGTP services
associated. When an SGSN and an MME are co-located, the GPRS or
SGSN service cannot be associated with the same SGTP service that
is used by the MME.
Show Output Updated
To Include “SGSN change” Attribute
Previous Behavior:
The SGSN-Change
present attribute was included in S-CDRs for Custom33
Dictionary. This attribute is not displayed on execution of the
command show
gtpp group name default .
New Behavior: The
missing attribute SGSN-Change
present is now included in the show output show gtpp group name default .
Show Output “show
port npu counter” Updated
Previous Behavior: The
show output show
port npu counter < > displays the individual VPI/VCI
instead of summing up all VPI/VCI.
New Behavior: The
show output show
port npu counter < > now displays the summed entities
of all VPI/VCI present on the port. The show output show port npu counter
< > vpi < > vci < > now displays the statistics
of that particular VPI/VCI.
State And Severity
Fields On SDH Traps
Previous Behavior:
Incorrect STATE and SEVERITY fields for some SDH traps in "starent.my"
file present in the system.
New Behavior: The
incorrect STATE and SEVERITY fields of SDH traps in "starent.my"
file have been corrected.
Impact: The correct
STATE and SEVERITY fields for SDH traps in "starent.my" file can
be viewed on the system.
Support For APN-OI-REPLACEMENT
At GPRS UE Level And GPRS PDP Level
Previous Behavior:
Support for APN-OI-REPLACEMENT is not present at GPRS UE level and
GPRS PDP level.
New Behavior: Support
for APN-OI-REPLACEMENT is added at GPRS UE level and GPRS PDP level.
Impact: APN-OI-REPLACEMENT
at GPRS UE and PDP level is available for use.
System_Type
Attribute For Custom42 Dictionary
Previous Behavior:
The values of the attribute “System_Type” in
custom42 dictionary are as follows:
- 01 = S-CDRs
- 02 = SGW-CDRs
New Behavior: The
values of the attribute “System_Type” for
custom42 dictionary are modified as follows:
- System_Type= 1
for 2G S-CDRs
- System_Type= 2
for 3G S-CDRs
- System_Type= 2
for 4G SGW- CDRs
Impact
Custom42 S-CDR has
new values for the attribute System_Type.
SGSN Command Changes
as of May 31, 2013
This section
provides information on SGSN command changes in release 14.0.
IMPORTANT:
For more information
regarding commands in this section, refer to the Command Line Interface
Reference for this release.
New SGSN Commands
This section
identifies new SGSN commands available in release 14.0.
Modified SGSN Commands
This section
identifies SGSN commands modified in release 14.0.
access-restriction-data
The eutran-not-allowed keyword
has been added to the access-restriction-data command
in Call Control Profile
Configuration Mode. Enabling this parameter allows the SGSN
to override the eutran-not-allowed flag received in ISD/ULA
messages from the HLR/HSS. Configuration of the eutran-not-allowed parameter
is valid only if SRNS relocation first has been configured in Call Control Profile
Configuration Mode via the srns-inter and/or srns-intra commands.
config
call-control-profile cc_profile_name
access-restriction-data
eutran-not-allowed
remove
access-restriction-data eutran-not-allowed
end
-
eutran-not-allowed overrides
the eutran-not-allowed flag received in ISD/ULA messages
from the HLR/HSS received during the Attach process. The
overridden value will be sent to the RNC during PDP context activation
(in the RAB Assignment Request message) so that the RNC subsequently
avoids handing over to E-UTRAN.
- Once created, the call-control-profile
must then be associated with an operator policy in Operator Policy Configuration
Mode using the associate command.
- Once the operator policy
is associated with the call-control-profile, inclusion of the E-UTRAN
Service Handover Information Element in RAB Assignment Request and
Relocation Request RANAP messages must be enabled. This is done
by executing the ranap eutran-service-handover-ie command
in RNC Configuration Mode.
aggregate-ipc-msg
Flushing limits the
number of messenger calls between managers to transfer the received packets.
The new gbmgr keyword,
representing the Gb Manager, enables the operator to configure the
threshold limit for flushing IPC messages, to the Session Manager,
that have been aggregated at the Gb Manager. The flushing limit
will be based on either desired flush-frequency or maximum number
of messages to be aggregated. Repeat the command to engage both
limits.
config
sgsn-global
aggregate-ipc-msg { gbmgr } { flush-frequency time | numb-msgs
number_msgs
default
aggregate-ipc-msg { gbmgr}
end
Where:
-
gbmgr identifies
the Gb Manager as the for which flushing limitations are configured.
-
flush-frequency sets
the frequency of message flushes in units of 100 msecs, with a valid
range of 1 to 3; default is 1.
-
num-msgs sets
the maximum number of IPC messages to be aggregated before flushing,
with a valid range of 1 to 164; default is 10.
-
default resets
both frequency and aggregation limits to default values.
IMPORTANT:
Setting num-msgs to
a value of 1 will disable message packet aggregation.
gmm paging-failure-action
A new gmm command
enables and configures the downlink data lockout timer (for both
GPRS and SGSN services) to reduce the frequency of mobile-initiated
keep alive messages. The following enables the timer for 3G subscribers:
config
context <context_name>
sgsn-service <sgsn_service_name>
gmm
paging-failure-action downlink-data-lockout-timer seconds [ repeat number_repeats ]
default
gmm paging-failure-action downlink-data-lockout-timer
[ default | no ] gmm
paging-failure-action
end
Where:
- Replacing sgsn-service sgsn_service_name with gprs-service gprs_service_name enables
the timer for 2G subscribers.
-
seconds sets
timer expiry for 0 to 10000 seconds; default is 1000.
-
number_repeats sets
the number of times (1 to 10) that the timer restarts after page
failure.
-
default resets
the timer default value.
-
[ default | no ] gmm
paging-failure-action disables the downlink data lockout
timer.
IMPORTANT:
If repeat is
not configured, then paging proceeds endlessly until the maximum
repeat (MR) timer expires.
peer-mme
The tac keyword
has been added to the peer-mme command
to allow for local configuration of the Tracking Area Code (TAC)
of the target eNodeB that maps to the peer MME address. The TAC
is used by the S4-SGSN for UTRAN to E-UTRAN (SGSN to MME) SRNS relocation
across the S3 interface. Configuration of the tac is optional,
and valid only if SRNS relocation first has been configured in Call Control Profile
Configuration Mode via the srns-inter and/or srns-intra commands.
The tac can
be configured as part of the local peer MME address used to bypass
DNS resolution during SRNS relocation, or as part of a fallback peer-mme
address that the system will use if DNS fails.
config
call-control-profile name
peer-mme
tac tac prefer local address
ipv4 ipv4-address interface s3
peer-mme
tac tac prefer fallback-for-dns
address ipv4-address interface s3
remove
peer-mme tac tac address ipv4-address interface s3
end
Where:
-
tac is the
Tracking Area Code of the target eNodeB that maps to the address
of the peer MME being configured. Valid entries are 1 to 65535.
ranap eutran-service-handover-ie
The eutran-service-handover-ie keyword
has been added to the ranap command
in RNC Configuration Mode.
Enabling this parameter results in the inclusion of the E-UTRAN
Service Handover Information Element in RAB Assignment Request messages
(during the PDP activation phase) and Relocation Request RANAP messages
(during the SRNS relocation phase). The IE in the RAB Assignment
Request during the PDP activation phase informs the RNC not to handover
the subscriber to E-UTRAN. The IE in the Relocation Request message
is sent when there is an intra-or inter-SGSN SRNS relocation within
the UTRAN itself so that the target RNC knows that it shall not
handover the subscriber to E-UTRAN. Configuration of the eutran-not-allowed parameter
is valid only if SRNS relocation first has been configured in Call Control Profile
Configuration Mode via the srns-inter and/or srns-intra commands.
config
context context_name
iups-service iups-service_name
rnc
id rnc_id
ranap
eutran-service-handover-ie
no
ranap eutran-service-handover-ie
Where:
-
eutran-service-handover-ie enables
the inclusion of the E-UTRAN Service Handover IE in the RAB Assignment
Request and Relocation Request RANAP messages.
-
no ranap eutran-service-handover-ie specifies
that the SGSN will never include the E-UTRAN Service Handover IE
in RAB Assignment Request and Relocation Request RANAP messages.
sgsn-address
The rnc_id keyword
has been added to the sgsn-address command
to allow for the local configuration of the target RNC ID that maps
to the address of the peer SGSN via the S16 interface. The RNC ID is
used by the S4-SGSN for inter-SGSN SRNS relocation. Configuration
of the rnc_id is
optional, and valid only if SRNS relocation first has been configured
in Call Control Profile
Configuration Mode using the srns-inter and/or srns-intra commands.
The rnc_id can
configured to as part of the local peer SGSN address used to bypass
DNS resolution during SRNS relocation, or as part of a fallback
peer SGSN address that the system will use if DNS fails.
config
call-control-profile cc_profile_name
sgsn-address
rnc_id rnc_id prefer local address
ipv4 ip-address interface s16
sgsn-address
rnc_id rnc_id prefer fallback-for-dns
ipv4 ipv4-address interface s16
no
sgsn-address ipv4 ip-address rnc_id rnc_id interface s16
Where:
-
rnc_id is
the target RNC ID that maps to the address of the peer SGSN being
configured. Valid entries are 0 to 65535.
snmp mib
The system-level Global
Configuration mode snmp command has
been modified to include a new keyword - mib. The mib keyword
allows an operator to selectively enable other industry standard
and Cisco Management Information Bases (MIBs) supported by the system.
By default, only the STARENT-MIB is enabled. You can display a list
of available MIBs by running the show snmp server command.
config
[ no ] snmp
mib mib_name
end
IMPORTANT:
This command is not
yet qualified.
Deprecated SGSN
Configuration Commands
This section
identifies deprecated SGSN commands that are no longer supported
in release 14.0.
SGSN Performance
Indicator Changes as of May 31, 2013
This section
provides information on SGSN performance indicator changes in release 14.0.
IMPORTANT:
For more information
regarding bulk statistics and output fields and counters in this
section, refer to the Statistics
and Counters Reference for this release.
New SGSN Bulk Statistics
This section
identifies new SGSN bulk statistics available in release 14.0.
The following bulk
statistics are new in this release:
System Schema
- disc-reason-535 (sgsn-dsd-allepswithdrawn)
- This disconnect reasons is for future use.
Modified SGSN Bulk
Statistics
This section
identifies SGSN bulk statistics modified in release 14.0.
Deprecated SGSN
Bulk Statistics
This section
identifies deprecated SGSN bulk statistics that are no longer supported
in release 14.0.
New SGSN Output
Fields and Counters
This section
identifies new SGSN show command output fields and counters available
in release 14.0.
show call-control-profile
full
A new field has been
added to the command output to indicate if the system is configured
to override the eutran-not-allowed flag received in ISD/ULA
messages received from the HLR/HSS.
In the ARD output section,
when eutran-not-allowed is
enabled:
- Access Restriction
Data :
EUTRAN Not Allowed
In the ARD output section,
when eutran-not-allowed is disabled:
- Access Restriction
Data :EUTRAN Allowed
show call-control-profile
full
Two fields have been
added to the output of this command to display the configured TAC (for
the peer sgsn-address) and/or RNC ID for the peer sgsn-address),
if configured.
In the SGSN Address output
section:
In the PEER MME output
section:
show egtpc statistics
verbose
Retransmission statistics
have been added for Suspend Notification and Resume Notification
in the CS Fallback Messages section of the command output.
One counter has been
added to track the total number of CSFB (Circuit Switched Fallback)
- initially transmitted suspend notification messages that had to
be retransmitted by the system, the specified service, or the specified
interface:
One counter has been
added to track the total number of CSFB - initially transmitted
resume notification messages that had to be retransmitted by the
system, the specified service, or the specified interface:
show gmm-sm statistics
verbose
New counters have been
added to to validate the number of times the lockout timer starts/stops/expires
for both 2G and 3G subscribers. All new counters are organized under
the Timers heading.
- Total-Lockout-timer-Start:
- 3G-Lockout-timer-Start:
- 2G-Lockout-timer-Start:
- Total-Lockout-timer-Stop:
- 3G-Lockout-timer-Stop
- 2G-Lockout-timer-Stop:
- Total-Lockout-timer-Expiry:
- 3G-Lockout-timer-Expiry:
- 2G-Lockout-timer-Expiry:
show gprsns statistics
msg-stats nse nsei
The format of the output
related to the BSC Lock statistics is modified under the “Number of
pdu dropped due to locked nse” heading to separately display
the number of packets dropped in both uplink and downlink directions.
The modified subheading and field titles are listed below:
- dropped in uplink
direction
- dropped in downlink
direction
show gtpp group
name default
The attribute SGSN-Change present included
in the show output.
show iups-service
all
The output of this
command has been enhanced to indicate if the system is configured
to include the E-UTRAN Service Handover IE in RAB Assignment Request
and Relocation Request RANAP messages.
When the system is
configured to include the E-UTRAN Service Handover IE:
- EUTRAN Service Handover :
IE included in message
When the system is
not configured to include the E-UTRAN Service Handover IE:
- EUTRAN Service Handover :
IE Not included in message
show session disconnect-reason
verbose
The following disconnect
reason is for future use even though it is visible:
- sgsn-dsd-allepswithdrawn(535)
show session subsystem
facility aaamgr instance <number>
New field added to
display number of GPRS UE level records.
show subscribers
gprs-only full all
PGW PLMN-Id is included
as a part of EPS subscription information.
New field added to
the CLI display of show
subscribers gprs-only full all to display GPRS UE and
PDP level APN-OI-REPLACEMENT.
show subscribers
sgsn-only full all
New field added to
the CLI display of show
subscribers sgsn-only full all to display GPRS UE and
PDP level APN-OI-REPLACEMENT.
show sgsn sessmgr
instance instance_no memory
statistics
Three statistics have
been added to provide S4-SGSN data path structure memory usage statistics.
The new statistics appear in the SGSN-specific Memory
Statistics section of the command output:
- S4 DP | S4
DP Sess
- S4 DP | S4-Gn
Data Fwd
- S4 DP | S4
IDFT Sess
show subscribers
sgsn-only full
A new field has been
added to the output of this command to indicate if the system is configured
to override the eutran-not-allowed flag received in ISD/ULA
messages from the HLR/HSS.
When the systen is
configured to override the eutran-not-allowed flag:
When the systen is
not configured to override the eutran-not-allowed flag:
- Eutran-not-allowed : False
Modified SGSN Output
Fields and Counters
This section
identifies modified SGSN show command output fields and counters
available in release 14.0.
show session subsystem
facility aaamgr instance <number>
The field “Total
PDP records” is modified as “Total GPRS PDP records”
Deprecated SGSN
Output Fields and Counters
This section
identifies deprecated SGSN output fields and counters that are no
longer supported in release 14.0.
SGSN Feature Changes
as of January 31, 2013
This section
provides information on SGSN feature changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the ASR 5000 Serving GPRS
Support Node Administration Guide for this release.
New SGSN Features
This section
identifies SGSN features new in release 14.0.
Custom S-CDR Dictionary
The SGSN supports a
new custom42 S-CDR dictionary. For detailed information, refer to the Cisco ASR 5x00 GTPP
Interface Administration and Reference.
Dual PDP Parameter
Support for Custom SGSN S-CDR Dictionaries
All custom S-CDR dictionaries
support the CDR Field "Served PDP/ PDN Address extension".
This field holds the IPv4 address of the subscriber (if available)
when the PDP type is IPv4v6. The inclusion of this field in the
S-CDR dictionary is enabled on execution of the command gtpp attribute served-pdp-pdn-address-extension in
the GTPP Server Group Configuration Mode. This field is disabled by
default and is not supported by the following dictionaries:
- custom17
- custom18
- custom23
- custom42
- custom41
IMPORTANT:
This field was supported
previously only on custom24 dictionary.
Gn Handoff from S4-SGSN
to 2G/3G Gn SGSN
Support is now available
for handoffs from the S4-SGSN to a 2G/3G peer SGSN as follows:
- An EPC capable UE is
attached to an S4-SGSN and has PDP contexts towards the EPC core
using the S4 interface.
- When the UE hands off
to a Gn/Gp SGSN, the S4-SGSN transfers the PDP contexts
to the peer SGSN using the GTPv1 protocol.
Handling SMC’s
GE Switch with Bad MMU
When the software detects
a catastrophic error with an internal control plane switch located on
the SMC card, the system will put the failed SMC in offline state.
The card with a control plane switch failure should be replaced.
The following is the
log message indicating a control plane failure:
“The System
Management Card with serial number <serial_number> in
slot <slot_number> has failed and will be reset and
kept down. (Device=SMC_GE_BCM5695, Reason=CONTROL_PLANE_MMU_FAILURE,
Status=[CPU0 MB: LINUX_RC: Done HB: xx] [CPU1
HB: xx] [CPU2] [CPU3])"
Preventing QoS Re-Negotiation
Failures
When there is a change
in QoS due to Inter-RAT handover from 2G to 3G OR Inter-SGSN handover
with no RAB establishment, the SGSN first informs the MS of new
QoS through “Modify PDP context request” and then
sets up a RAB. With new CLI control provided at the SGSN Service
Configuration Mode, the SGSN can first set up a RAB and then proceed
with a UPCQ towards GGSN / Modify towards UE based on whether
or not RNC downgrades the QoS.
TheA new command implements
this feature is documented in the New SGSN Configuration
Commands section.
Modified SGSN Features
This section
identifies SGSN features modified in release 14.0.
Authentication When
Hostname Used
Previous Behavior: Hostname
in authorized-key configuration was not checked in previous Release
12.0 code when using key-based authentication. Later, the procedure
was changed to check the hostname against the client IPv4 address.
New Behavior: Hostname
in the authorized-key configuration will be checked against the
client IPv4 address when it is configured as the IPv4 address in
the key-based authentication. Currently, the hostname associated
with a non-IPv4 address in the authorized-key configuration will
not be checked and will be treated in the previous manner and passed.
Bulk Stats for 3G
Activation Failure/Reject with Cause Codes
Previous Behavior: The
existing SGSN counters do not support segregation of internal and
external triggers that lead to 3G Activation Failure/Reject
with following cause codes:
- 3G-actv-rej-network-failure
- 3G-actv-rej-svc-opt-tmp-out-of-order
- 3G-actv-rej-unspecified-error
- 3G-sec-actv-rej-unspecified-error
- 3G-actv-rej-insufficient-resources
- 3G-sec-actv-rej-insufficient-resources
New Behavior: New
counters are added to indicate internal and external triggers that
lead to 3G Activation Failure/Reject with cause codes.
With the new counters, the operator has the flexibility to choose
either internal or external triggers to compute KPIs.
The new counters are
listed in the New SGSN
Bulk Statistics section.
Bulk Stats for Iu
Release before 3G Attach
Previous Behavior: Several
reasons (triggers) can be attributed in the SGSN for an Iu being
released before a 3G Attach. Previously, there was no break up in
the SGSN code to separately indicate internal and external triggers
that lead to Iu being released before Attach in 3G.
New Behavior: New
bulk statistics have been added to the SGSN schema to support the
segregation of internal and external triggers for Iu being released
when it occurs prior to a 3G Attach. With the new counters, the
operator has the flexibility to choose either internal or external
triggers to compute KPIs.
The new counters are
listed in the New SGSN
Bulk Statistics section.
IMPORTANT:
Currently, there are
no internal failure triggers for the Iu release before Attach, "3G-attach-fail-iu_release-internal"
and "3G-attach-fail-iu_release-comb-internal" are place
holders for future enhancements in the bulk statistics.
Bulk Stats Track
2G or 3G Attach Rej with Network Failure Cause Codes
Previous Behavior: Prior
to this release, the SGSN counters did not support segregation of
internal and external triggers that lead to 2G/3G Attach
Reject with a “Network Failure” cause code.
New Behavior: With
this release, new bulk statistics are added to the SGSN schema to
indicate both internal and external triggers that lead to 2G/3GAttach
Reject with a “Network Failure” cause code. With
the new counters, the operator has the flexibility to choose either
internal or external triggers to compute KPIs.
IMPORTANT:
Currently, the internal
failure triggers for 2G Attach Reject with “Network Failure” cause code
are not available.
The new counters are
listed in the New SGSN
Bulk Statistics section.
Bulk Stats for 2G
Simple and Combined Attach Failures
Previous Behavior: The
SGSN code does not provide counters or bulk statistics that support
segregation of internal and external triggers for 2G Attach Failures.
In the CLI output the following counters account only for internal
triggers (Internal Errors) for 2G Attach Failures:
- 2G-Attach-Failure
- Gprs-Attach-Failure
- Comb-Attach-Failure
The following bulk
statistics account only for internal triggers (Internal Errors)
in 2G Attach Failures:
- 2G-total-attach-fail
- 2G-total-attach-fail-comb
- 2G-total-attach-fail-all
New Behavior: The
SGSN's behavior regarding the above counters has been changed. The
SGSN code now supports segregation of internal and external triggers
(errors) for 2G Attach Failures. As well, new bulk statistics have
been added to the SGSN schema. The new counters are listed in the New SGSN Bulk Statistics section.
Impact on Customer: The
values of the above mentioned counters increase due to the change
in behavior. A drop in the counter “2G-attach success rate” is
observed if the same counters are used for calculating KPIs.
Cause Value Corrected
Previous Behavior: When
the SGSN receives a BSSGP UL data packet with signaling BVCI (bvci = 0)
it sends a status message with cause value "process overload".
New Behavior: When
the SGSN receives a BSSGP UL data packet with signaling BVCI (bvci = 0)
it sends a status message with correct cause value "protocol error, unspecified",
per 3GPP TS 40.018 (section 5.4.1).
Change in Text Displayed
While Configuring Point Code
Previous Behavior: On
configuring a value higher than one in the valid range for self
point code, the following text was displayed:
[local]bngnc3(config-ss7-rd-3-ps-id-1)# self-point-code 16384
itu point-code out
of range, valid range is 0 to 16383
New Behavior: The
text displayed, when entering a value higher than valid range for
self point code, has been modified for several variants to read:
Failure: ITU point-code
out of range, valid range is 0 to 16383
Failure: ANSI/CHINA
point-code out of range, valid range is 0 to 16777215
Failure: ITU point-code
out of range, valid range is 0.0.0 to 7.255.7
Failure: point-code
value out of range
Changes to IPv4v6
PDP-Type Fallback Statistics
Previous Behavior: The
requested PDN-Type of IPv4v6 is NOT overridden in Create-Session-Request
with the subscribed PDN-Type of IPv4 or IPv6 for the following scenario where:
- the PDN-Type received
in an Activate-PDP-Ctx-Req is IPv4v6 and
- the APN is not sent
by the MS and
- the PDN-Type in the
Subscription is IPv4 or IPv6.
As there was no fallback
of IPv4v6 PDN-type done in this scenario, the corresponding counters
under GMM-SM stats were not incremented.
New Behavior: Behavior
is changed to override the requested IPv4v6 PDN-Type in Create-Session-Request
with the subscribed type (IPv4 or IPv6) and the corresponding counters
under GMM-SM stats are incremented for this scenario also.
The following show gmm-sm statistics counters
are now incremented for the above mentioned scenario.
- 2G IPv4v6 PDP Type
Fallback Statistics
- IPv4 due to subscription:
- IPv6 due to subscription:
- 3G IPv4v6 PDP Type
Fallback Statistics
- IPv4 due to subscription:
- IPv6 due to subscription:
Ext-PDP-Address
and Type Displayed upon Validation of Ext-PDP-Type
Previous Behavior: The
Ext-PDP-Address and Ext-PDP-Address type were displayed without
checking for Ext-PDP-Type.
New Behavior: The
software has been modified so that the Ext-PDP-Address and Ext-PDP-Address
type are displayed only if Ext-PDP-Type is “ipv4v6”.
Handling EGTP Context
Response for 2G Old-ISRAU
Previous Behavior:
If :
- the subscriber wasUMTS_Enabled,
- the ME was UMTS_AKA
enabled,
- the subscriber was
attached to a 2G (old_NW),
And if
- the Old_SGSN
received EGTP_Req (Identification / Context),
then the SGSN should
have sent "UMTS Key, Used Cipher and Quintuplets" type MM_CTXT
to the Peer (per 29.274, 8.38).
And if
- the subscriber was
UMTS and
- the ME was NO_UMTS_AKA
enabled,
then the SGSN should
have sent the peer "GSM Key, Used Cipher and Quintuplets" type MM_CTXT
as the EGTP response.
However,
- instead of sending
"GSM Key, Used Cipher and Quintuplets (2)", the SGSN was sending
"UMTS Key and Quintuplets (3)" type MM_CTXT, and
- in place of sending
"UMTS Key and Quintuplets (3)”, the SGSN was sending "UMTS
Key, Used Cipher and Quintuplets(1)".
And if the subscriber
was UMTS, the ME was UMTS_AKA, then the SGSN was responding
to EGTP Req with MM_CTXT type as UMTS Key and Quintuplets
(1)
New Behavior:
- If the subscriber is
UMTS and the ME is UMTS_AKA,
then the SGSN will respond to EGTP Req with MM_CTXT type
as UMTS Key, Used Cipher and Quintuplets (1)
- If the subscriber is
UMTS and the ME is NO_UMTS_AKA,
then the SGSN will send GSM Key, Used Cipher and Quintuplets (2).
Handling of Delete
Bearer Request during Inter-SGSN Handoff / new-SGSN
Previous Behavior: Delete
Bearer Request during Inter-SGSN hand-off, Cisco SGSN was the new-SGSN,
was being queued and was processed once hand-off procedure was completed.
New Behavior: Delete
Bearer Request during Inter-SGSN hand-off, Cisco SGSN is the new-SGSN,
will be rejected with cause 110 (Temporarily rejected due to handover procedure
in progress).
Impact on Customer: Increase
in Delete Bearer Response with cause 110.
Handling of Re-transmitted
Secondary PDP Context Request Messages
Previous Behavior: In
2G scenarios, the SGSN clears the original call to receive re-transmitted
Activate PDP context request message. The SGSN incorrectly treats
the re-transmitted request as a new activate request with some parameters
same as the original activation request.
New Behavior: If
the new activate PDP request is same as the on-going activation
request it indicates that the new request is a re-transmitted request,
the SGSN drops such re-transmitted activation requests and continues
with the on-going activation request.
Identification Request
Not Initiated by SGSN
Previous Behavior: The
SGSN initiates an Identification / CTXT request to a Peer
MME even if the MS has not provided the PTMSI_SIG in Attach
request / RAU PDU. The MME is unable to create a GUTTI
without the PTMSI_SIG. The request is rejected and GMM
Id request or RAU Reject is sent to the MS.
New Behavior: As
per 3GPP TS 29.274 v9, now the SGSN will not initiate an Identification / CTXT
request but, it directly initiates a GMM Id request or RAU Reject
if the subscriber is previously attached to a MME and the MS has
not provided a PTMSI_SIG in Attach request / RAU
PDU.
Identifying EPC-Capable
3G Subscribers Activated via GN Interface
Previous Behavior: :
When 3G EPC-capable subscribers were attached to the S4-SGSN and
activated via the Gn interface, the show subscriber summary command
incorrectly listed the 3G subscribers as activated via the S4 interface.
New Behavior: The
software has been modified to correct how the system identifies
3G subscribers activated via the Gn and S4 interfaces. The show
subscriber summary command now correctly identifies the interface
over which a 3G subscriber has been activated.
Managing TLLI from
Unknown Subscriber
Previous Behavior: Immediately
after receiving an uplink packet from an unknown subscriber the
SGSN sent Detach.
New Behavior: When
receiving an uplink packet from an unknown subscriber with local
or foreign TLLI, the SGSN will queue the TLLI for that subscriber
until a configured number of packets are received and then the SGSN
sends Detach. A new "queue-unknown-tlli" command has been added
to the SGSN Global configuration mode to support the change in functionality.
Impact on Customer: Stats
per Routing Area are not pegged for the packets from an unknown
subscriber except for those packets for which the SGSN sends Detach.
PDP Activation Support
for EPS Subscribers using Non-EPC Devices
Previous Behavior: If
a subscriber had only an EPS subscription but was using a non-EPC
device, PDP activation on the S4-SGSN was always attempted via the
Gn interface. Since the system always looks for a GPRS subscription
for activation via the Gn interface, activation would fail.
New Behavior: If
a subscriber has only an EPS subscription at the HLR / HSS, and
attempts PDP activation from a non-EPC device, the S4-SGSN will
attempt to activate the PDP context over the S4 interface. The S4-SGSN
will perform APN selection using the EPS subscription and, if that
succeeds, PDP activation will proceed using the S4 interface. However,
if the DNS server returns a GGSN address instead of PGW-S5 interface
address for the APN FQDN, the S4-SGSN will reject the PDP activation
because a GPRS subscription is required for activation via the Gn
interface.
This implementation
of this new behavior is based on the following:
- If an APN is in the
user's EPS subscription it means it is an LTE APN. As a result,
operators should ensure that the PGW S5-GTP address is available
for those APNs.
- For PDP activation over
the Gn interface, the S4-SGSN looks for a GPRS subscription because
activation of an EPS subscription on the Gn interface is not yet supported.
Note that an EPS subscriber
with a non-EPC capable UE could attempt PDP activation in the following
scenarios:
- The UE is EPC (4G) capable,
but the user has temporarily switched to 3G only mode. The user
then attempts the first PDP activation after switching from 4G to
3G.
- An EPS subscriber inserted
a 4G SIM card in a 3G phone.
Processing of Activate
Requests Modified
Previous Behavior: The
Activate Requests are processed during on-going Attach procedure
for a subscriber who is already Attached.
New Behavior: The
Activate Requests are dropped during on-going Attach procedure for
a subscriber who is already Attached.
Impact on Customer: An
increase in Activation re-transmission requests will be observed
in the network when Activate Requests are dropped during ongoing
Attach procedure for a subscriber who is already Attached.
Sending ULI and UE
Timezone IE in GTPv2 CSRs
Previous Behavior: :
The S4-SGSN was not including User Location Information (ULI) or
the UE Time Zone IE in GTPv2 Create Session Request (CSR) messages
as required by standard TS 29.274 section 7.2.1.
New Behavior: The
software has been modified to correct this issue. To comply with
the standard, the S4-SGSN now provides the following:
- The ULI and UE Time
Zone IE in GTPv2 Create Session Request messages sent by the S4-SGSN
during PDP activation procedures.
- The UE Time Zone value
in GTPv2 Create Session Request messages sent by the S4-SGSN during
SGW relocation procedures.
No CLI changes were
required to implement this functionality.
IMPORTANT:
The PGW Requested Location
Information Change Reporting function is not yet supported on the
S4-SGSN. As a result, if that functionality is requested, the SGSN
will not include ULI in the GTPv2 Create Session Request messages
sent during SGW relocations.
SGSN Configuration
Management Changes as of January 31, 2013
This section
provides information on SGSN configuration command changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the Command Line Interface
Reference for this release.
New SGSN Configuration
Commands
This section
identifies SGSN commands new in release 14.0.
queue-unknown-tlli
New command enables,
disables, and configures parameters that manage TLLI and packets received
from unknown subscribers. Enabling the command causes the SGSN to
store the TLLI of an unknown subscriber in a hash list.
SGSN Global Configuration
Mode
queue-unknown-tlli [ expiry-time time | max-pkts
number ]
[ default | no ] queue-unknown-tlli
Where:
-
expiry-time -
Defines the number of minutes before the SGSN checks the hash list
for expired TLLI entries and removes them..
-
max-pkts -
Defines the maximum number of packets with TLLI of an unknown subscriber
that can be queued before Detach is sent.
-
default -
Disables the queue configuration.
-
no - Disables
the queue configuration and clears the has list.
qos-modification
inform-rnc-before-ue
New CLI control, introduced
in the SGSN Service configuration mode, helps the operators to prevent
QoS re-negotiation failures by providing the flexibility to enable/ disable
RAB set up followed by UPCQ towards GGSN / Modify towards
UE based on whether or not RNC downgrades the QoS. By default, the
SGSN informs UE before RNC.
SGSN Service Configuration
Mode
qos-modification inform-rnc-before-ue
no qos-modification
Where:
- Execution of the command
qos-modification overrides SGSN Behavior during PDP modification
procedure.
- On execution of the
keyword inform-rnc-before-ue, the SGSN informs RNC of new QoS before
informing UE.
Modified SGSN Configuration
Commands
This section
identifies SGSN commands modified in release 14.0.
gtp send
In the Call Control
Profile Configuration Mode, the keywords rai and uli for the
command gtp send have
been enhanced to include new keyword options to select the PLMN.
Call Control Profile
Configuration Mode
gtp send { rai | uli } [ use-local-plmn [ network-sharing { use-selected-plmn | use-ue-plmn | use-common-plmn } ]
Where:
use-local-plmn: This
keyword includes the local PLMN when network is not shared.
- network-sharing: This
keyword configures network sharing.
- use-selected-plmn:
This keyword includes the Selected PLMN when network sharing is enabled.
- use-ue-plmn : This
keyword includes the Selected PLMN for supporting UE and Common PLMN
for non-supporting UE when network sharing is enabled.
- use-common-plmn: This
keyword includes the Common PLMN when network sharing is enabled.
iu-hold-connection
The range of the parameter iu-hold-connection is modified,
the minimum permissible limit is changed from “10” seconds
to “1” second.
IMPORTANT:
It is recommended to
use a minimum value of “10” seconds. If a value
less than “10” seconds is used, more collisions
may be observed. If the minimum value of “1” is
set, after a re-load INTRA-RAU (with unknown ptmsi, old-rai known)
will be released in “1” second if the Identity
Rsp does not come within “1” second.
IuPS Service Configuration
Mode
iu-hold-connection [ always | requested-by-ms ] [ hold-time seconds ]
Deprecated SGSN
Configuration Commands
This section
identifies SGSN commands deprecated in release 14.0.
local-directory
Backup of statistics
into the local directory is no longer a needed function so the local-directory command
(in italics below) has been removed from the Bulkstatistics configuration
mode.
[local]asr5000(config-bulkstats)# ?
...
local-directory -
Configure the local directory for storing collection files
remotefile -
Configure the naming convention(s) used when storing the collection
files to the receiver
...
SGSN Performance
Management Changes as of January 31, 2013
New SGSN Bulk Statistics
This section
identifies new SGSN bulk statistics available in release 14.0.
New in the SGSN
Schema
New bulk stats track
2G Attach Rej with network failure cause codes:
- 2G-attach-rej-network-failure-ext
- 2G-attach-rej-network-failure-int
- 2G-comb-attach-rej-network-failure-ext
- 2G-comb-attach-rej-network-failure-int
New bulk stats track
3G Attach Rej with network failure cause codes:
- 3G-attach-rej-network-failure-ext
- 3G-attach-rej-network-failure-int
- 3G-comb-attach-rej-network-failure-ext
- 3G-comb-attach-rej-network-failure-int
New bulk stats for
Iu Release before 3G Attach:
- 3G-attach-fail-iu_release-external
- 3G-attach-fail-iu_release-internal
- 3G-attach-fail-iu_release-comb-external
- 3G-attach-fail-iu_release-comb-internal
New stats track 3G
Activation Failure/Reject with cause codes:
- 3G-actv-rej-network-failure-ext
- 3G-actv-rej-network-failure-int
- 3G-actv-rej-svc-opt-tmp-out-of-order-ext
- 3G-actv-rej-svc-opt-tmp-out-of-order-int
- 3G-actv-rej-unspecified-error-ext
- 3G-actv-rej-unspecified-error-int
- 3G-sec-actv-rej-unspecified-error-ext
- 3G-sec-actv-rej-unspecified-error-int
- 3G-actv-rej-insufficient-resources-ext
- 3G-actv-rej-insufficient-resources-int
- 3G-sec-actv-rej-insufficient-resources-ext
- 3G-sec-actv-rej-insufficient-resources-int
- 3G-total-actv-reject-internal
- 3G-total-actv-reject-external
Statistics for 2G simple
and combined Attach failures:
- 2G-attach-fail-suspend-received
- 2G-attach-fail-bvc-rst-received
- 2G-attach-fail-sai-failure
- 2G-attach-fail-auth-tmr-expiry
- 2G-attach-fail-sgsn-init-detach
- 2G-attach-fail-plmn-check-failed
- 2G-attach-fail-identity-failure
- 2G-attach-fail-radio-status-cell-resel
- 2G-attach-fail-check-imei-failure
- 2G-attach-fail-rej-due-to-congestion
- 2G-attach-fail-camel-failure
- 2G-attach-fail-radio-status-bad
- 2G-attach-fail-t3350-expiry
- 2G-attach-fail-auth-failure
- 2G-attach-fail-glu-failure
- 2G-attach-fail-ms-init-detach
- 2G-attach-fail-opr-policy-failure
- 2G-attach-fail-cl-init-detach
- 2G-attach-fail-abort-on-attach
- 2G-attach-fail-attach-on-attach
- 2G-attach-fail-ready-tmr
- 2G-attach-fail-camel-srv-not-assoc
- 2G-attach-fail-p-tmsi-sign-mismatch
- 2G-attach-fail-xid-resp-failure
- 2G-attach-fail-internal-failure
- 2G-attach-fail-comb-suspend-received
- 2G-attach-fail-comb-bvc-rst-received
- 2G-attach-fail-comb-sai-failure
- 2G-attach-fail-comb-auth-tmr-expiry
- 2G-attach-fail-comb-sgsn-init-detach
- 2G-attach-fail-comb-plmn-check-failed
- 2G-attach-fail-comb-identity-failure
- 2G-attach-fail-comb-radio-status-cell-resel
- 2G-attach-fail-comb-check-imei-failure
- 2G-attach-fail-comb-rej-due-to-congestion
- 2G-attach-fail-comb-camel-failure
- 2G-attach-fail-comb-radio-status-bad
- 2G-attach-fail-comb-t3350-expiry
- 2G-attach-fail-comb-auth-failure
- 2G-attach-fail-comb-glu-failure
- 2G-attach-fail-comb-ms-init-detach
- 2G-attach-fail-comb-ms-init-detach
- 2G-attach-fail-comb-opr-policy-failure
- 2G-attach-fail-comb-cl-init-detach
- 2G-attach-fail-comb-abort-on-attach
- 2G-attach-fail-comb-attach-on-attach
- 2G-attach-fail-comb-ready-tmr
- 2G-attach-fail-comb-camel-srv-not-assoc
- 2G-attach-fail-comb-p-tmsi-sign-mismatch
- 2G-attach-fail-comb-xid-resp-failure
- 2G-attach-fail-comb-internal-failure
New in the System
Schema
The following new bulk
statistics are also new disconnect reason visible in the output
of the show session
disconnect-reason verbose command.
- sgsn-cancel-loc-inital-attach(513)
- sgsn-nrspca-actv-rej-by-sgsn(515)
- sgsn-nrspca-actv-rej-by-ms(516)
- sgsn-no-ptmsi-signature(518)
Modified SGSN Bulk
Statistics
This section
identifies modified SGSN bulk statistics available in release 14.0.
Deprecated SGSN Bulk
Statistics
This section
identifies SGSN bulk statistics deprecated in release 14.0.
Deprecated in the
SGSN Schema
- 2G-attach-fail-plmn-check-failed
- 2G-attach-fail-comb-plmn-check-failed
New SGSN Performance
Commands
This section
identifies new SGSN performance commands available in release 14.0.
Modified SGSN Performance
Commands
This section
identifies modified SGSN performance commands available in release 14.0.
clear ss7-routing-domain
The command clear ss7-routing-domain
asp all sctp statistics end-point is issued to clear statistics
of ASP instances, the error message displayed on for non-existing
ASP instances is modified to indicate the instance does not exist.
Exec Mode
clear ss7-routing-domain
asp all sctp statistics end-point
show bulkstatistics
The output for the show bulkstats command
has been modified and the following counter has been removed:
show gmm-sm statistics
verbose
New counters peg TLLI
from unknown subscribers. These new counters appear in both the GPRS
GMM Stack Internal Statistics section of the command output:
- rem-utlli-ptmsi-alloc:
- rem-utlli-attach-rx:
- rem-utlli-rau-rx:
- rem-utlli-max-pkts:
- rem-utlli-queue-full:
- rem-utlli-timer-expiry:
- detach-sent-utlli:
- utlli-entries-added:
New statistics have
been added to indicate transmission or receipt of a Modification
PDP Context Reject with a cause code of Request Rejected, Bearer
Control Mode (BCM) Violation on the S4-SGSN.
These new counters
appear in both the Modify PDP Context Denied Tx and Modify PDP Context
Denied Rx sections of the command output:
- 3G-Req Rej BCM Violation
- 2G-Req Rej BCM Violation
- 3G-Iu Release Before
Attach Segregation:
- GPRS-Attach
- External Triggers
- Internal Triggers
- Comb-Attach:
- External Triggers
- Internal Triggers
The
following new counters track 3G activation failure/reject
with cause codes:
- Activate Context Reject
Segregation:
- Total-3G-Actv-Reject:
- External Triggered
- Internal Triggered
- 3G-Primary-Actv-Reject
- External Triggered
- Internal Triggered
- 3G-Secondary-Actv-Reject
- External Triggered
- Internal Triggered
- Activate Primary PDP
Context Insufficient Resource Cause Segregation
- Total 3G-Insuff res
triggers
- Total 3G-Insuff res
external triggs
- 3G-Qos Negotiation
Fail
- 3G-Operator Policy
Fail
- 3G-GGSN Has No Resources
- 3G-GGSN Changed PDP
Type
- 3G-GGSN PDP Addr Alloc
Fail
- 3G-RNC GTPU Path Failure
- 3G-RNC RAB Establishment
Fail
- Total 3G-Insuff res
internal triggs
- 3G-SGSN Has No Memory
- Activate Secondary
PDP Context Insufficient Resource Cause Segregation
- Total 3G-Insuff res
triggers
- Total 3G-Insuff res
external triggs
- 3G-Qos Negotiation
Fail
- 3G-Operator Policy
Fail
- 3G-Primary is GTPV0
- 3G-GGSN Has No Resource
- 3G-PDP Addr Type Mismatch
- 3G-RNC GTPU Path Failure
- 3G-RNC RAB Establishment
Fail
- 3G-Ongoing Bundle Deactivation
- Total 3G-Insuff res
internal triggs
- 3G-SGSN Has No Memory
show gmm-sm statistics
gmm-only verbose
New counter added:
- No suitable cell in
Location Area
show linkmgr instance
<#> parser statistics all
Link Manager parser
statistics are updated to include the count of TC-Continue messages forwarded
and received at respective Link Managers. Also a field has been
added to indicate the number of free transactions available per
Link Manager instance since the max is 2048. Listed below are the
new counters added:
- FWD Cont
- RCD Cont
- FWD Cont Error
- Free Dlg Count:
show location-service
statistics
The following changes
were made to the output:
- Changed the names of
the message statistics.
- Added a counter for
PSL request dropped.
- Removed Retry and Timeout
counter.
- Removed LR Request
counters.
- Changed the names of
Message Error statistics.
The new display appears
as:
[local]SGSN3# show
location-service statistics all
Location Service Statistics
for all services
Message Statistics:
PSL
Request 0 PSL Answer 0
PSL
Request Dropped 0 PSL
Answer Dropped 0
Message Error Statistics:
User
Unknown 0 Unauthorized
Requesting Network 0
Unreachable
User 0 Suspended User 0
Detached
User 0 Positioning Denied 0
Positioning
Failed 0 Unreachable
LCS Client 0
Other Errors 0
show s4-sgsn statistics
all
New statistics have
been added to provide more detailed information on the reasons for
Idle Mode Signaling Reduction (ISR) deactivations on the S4-SGSN.
These new counters appear in the ISR Deactivations section of the
command output:
- 3G NW Initiated Detach
- 3G MR IDT Expiry
- 3G MS Initiated Detach
- 3G Cancel Location from
HSS/HLR
- 3G SRNS Abort
- 3G Local Admin Detach
- 3G SGW Change During
SRNS
As a result of these
counter additions, the 3G Implicit Detach counter has been deprecated.
show session setuptime
A check is added prior
to the retrieval of the counter values from the Session Manager
to verify if the given service is configured and running. If an
SGSN service is not configured and the command show session setuptime
sgsn-only is executed, an error message is displayed indicating
the service is not configured/ started. If an SGSN service is
configured counter values are retrieved.
Exec Mode
show session setuptime
sgsn-only
show session subsystem
facility
The show CLI output
for show session
subsystem facility aaamgr all (or) instance <num> has
been modified. No functional change has occurred. The word ‘Primary’ has
been removed from 3 fields in the show command output:
Old display:
- 8010 Total APN Primary
database records
- 0 Total PDN GW Primary
database records
- 8 Total Duplicate Entries
in Primary database records
New display:
- 8010 Total APN database
records
- 0 Total PDN GW database
records
- 8 Total Duplicate Entries
in database records
show sgsn-fast-path
statistics all/smgr-instance
The CLI output is
enhanced to include a new counter to indicate the number of un-attempted
fast path activations due to non-availability of NPU flow. Listed
below is the new counter:
- FP Max flow Limit Reached
show sgsn-service
name
New counter introduced
to display if the new funtionality enabled/disabled to
inform RNC before UE during QoS modification.
- Inform RNC before UE
during QOS Modification : Enabled
show sgsn sessmgr
instance memory statistics
The output has been
enhanced to include HSS Session and Request statistics for:
- entities
- block user
- block size
- number of allocations
- number of free items
show sgtpc statistics
verbose
New counter pegs dropped
GTPv0 messages:
- GTPV0 msgs drpd due
to no support in the usr app:
show subscribers { gprs-only | sgsn-only } full
In the EPS Subscription section
of the command output, the PDN
Allocation Type field has been renamed PGW Allocation Type.
This name change was made to avoid confusing PDN Allocation Type
with PDP Address Allocation Type.
The output is enhanced
to include the “LCS Subscription Information” fields
listed below:
- LCS Privacy Exception
List
- LCS Privacy Class
- SS Code
- SS Status
- Notification to MS
User
- External Client List
- External Client Id
- GMLC Restriction
- Notification to MS
User
- PLMN Client List
- Ext-External Client
List
- External Client Id
- GMLC Restriction
- Notification to MS
User
- Service List
- Service Type Id
- GMLC Restriction
- Notification to MS
User
- Add LCS Privacy Exception
List
- LCS Privacy Class
- SS Code
- SS Status
- Notification to MS
User
- External Client List
- PLMN Client List
- Ext-External Client
List
- Service List
show subscribers { gprs-only | sgsn-only } full
all
The following new fields
have been added to the output for this command:
- Ext PDP Type
- Ext PDP Address Type
- Ext PDP address
IMPORTANT:
Ext-PDP-Address and
Ext-PDP-Address-Type fields only appear if the value for Ext-PDP-Type
is ‘IPV4-V6’.
show support details
Includes HSS-Peer Service Info
HSS Peer Service information
displayed by theshow
hss-peer-service service all command is now included in
the show support details command.
Deprecated SGSN Performance
Commands
This section
identifies SGSN performance commands deprecated in release 14.0.
SGSN Security Management
Changes as of January 31, 2013
This section provides
information on SGSN security management changes in release 14.0.
SGSN Feature Changes
as of December 21, 2012
This section
provides information on SGSN feature changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the ASR 5000 Serving GPRS
Support Node Administration Guide for this release.
New SGSN Features
This section
identifies SGSN features new in release 14.0.
Modified SGSN Features
This section
identifies SGSN features modified in release 14.0.
Support for Non-Shared
Area Access
Previous Behavior: The
SGSN does not support non-shared area access when network-sharing
is enabled. The SGSN sends the common-plmn value if the selected-plmn
IE is not present for the non-shared area.
New Behavior: A
new CLI command is provided to support non-shared area access when
network-sharing is enabled. A new network-sharing
command option non-shared is provided
in the IuPS Service Configuration Mode to enable non-shared area
access. Refer to the section New SGSN Configuration Commands for
syntax details.
Impact: Non-shared
area access is supported when network-sharing is enabled
SGSN Configuration
Management Changes as of December 21, 2012
This section
provides information on SGSN configuration command changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the Command Line Interface
Reference for this release.
New SGSN Configuration
Commands
This section
identifies SGSN commands new in release 14.0.
network-sharing non-shared
New command allows non-shared
area access when network-sharing is enabled. By default non-shared
access is disabled. The no form of the command is used to disable
non-shared area access.
IuPS Service Configuration
Mode
network-sharing non-shared
no network-sharing non-shared
default network-sharing
non-shared
Modified SGSN Configuration
Commands
This section
identifies SGSN commands modified in release 14.0.
Deprecated SGSN
Configuration Commands
This section
identifies SGSN commands deprecated in release 14.0.
gmm-sm-statistics
attach-rejects
This command is deprecated
and removed from the code.
SGSN-Global Configuration
mode
gmm-sm-statistics attach-rejects
cause network-failure only-internal
no gmm-sm-statistics
attach-rejects
SGSN Performance
Management Changes as of December 21, 2012
This section provides
information on SGSN performance management changes in release 14.0.
SGSN Security Management
Changes as of December 21, 2012
This section provides
information on SGSN security management changes in release 14.0.
SGSN Feature Changes
as of November 30, 2012
This section
provides information on SGSN feature changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the ASR 5000 Serving GPRS
Support Node Administration Guide for this release.
New SGSN Features
This section
identifies SGSN features new in release 14.0.
Release 8 Specific
IEs Supported for MAP
The following Release
8 IEs, for MAP, 3GPP specificationTS 29.002, are supported.
- Update GPRS Location
- Req:
- Supported RAT Types
Indicator
- EPS Info
- Serving Node Type Indicator
- Supported Features
- Used RAT Type
Update
GPRS Location - Resp:
- SGSN-MME Separation
Support Indicator
Insert Subscriber Data - Req:
- EPS Subscription Data
- Roaming Restricted
In SGSN/MME Due To Unsupported Feature
Delete
Subscription Data - Req:
- EPS Subscription Data
Withdraw
Send Authentication Info - Req:
- Requesting Node Type
(New enums to be added)
- Number of additional
requested vectors
- Additional requested
Vectors are for EPC
READY FOR SM - Req:
- Additional Alert Reason Indicator
Support for Modified
S-CDR Field “System Type”
The SGSN supports a
new custom dictionary “Custom38”, In this dictionary,
the “System Type” field is not included in the
S-CDR for GERAN and the value for UTRAN is “1”.
Modified SGSN Features
This section
identifies SGSN features modified in release 14.0.
Defaults Included
for RANAP ARP IE
Previous Behavior: If
ARP mapping was not configured in the APN profile with the ranap allocation-retention-priority-ie,
then the SGSN was not sending the ARP IE in the RANAP message even
if ranap arp-ie was
configured for the RNC under the IuPS service configuration.
New Behavior: Default
function has changed so that even if ARP mapping has not been configured
in the APN profile, the SGSN will send out default values in the
RANAP message when ranap
arp-ie is configured for the RNC under the IuPS service configuration.
SGSN Configuration
Management Changes as of November 30, 2012
This section
provides information on SGSN configuration command changes in release 14.0.
SGSN Performance
Management Changes as of November 30, 2012
New SGSN Bulk Statistics
This section
identifies new SGSN bulk statistics available in release 14.0.
Modified SGSN Bulk
Statistics
This section
identifies modified SGSN bulk statistics available in release 14.0.
Deprecated SGSN Bulk
Statistics
This section
identifies SGSN bulk statistics deprecated in release 14.0.
New SGSN Performance
Commands
This section
identifies new SGSN performance commands available in release 14.0.
Modified SGSN Performance
Commands
This section
identifies modified SGSN performance commands available in release 14.0.
show aaa group name
aaa-grp
New prefix dynamic-load is
added to the dictionary name to indicate if it is a dynamic dictionary.The
updated output contains the following new field:
show gmm-sm statistics
The show ouput is updated
with new counters to display the number of re-transmitted Activate
PDP context request messages from MS for both 2G and 3G and counters
to display each of the primary Activate PDP context request re-transmissions
and secondary activate PDP context request re-transmissions. Listed
below are the new counters:
- Activate Context Request
Retransmitted
- 3G-Primary-Actv-drop
- 2G-Primary-Actv-Drop
- 3G-Secondary-Actv-Drop
- 2G-Secondary-Actv-Drop
show sgtpc statistics
verbose
The output of this
command has been updated to include the following new counter to display
GTPv0 messages dropped:
- GTPV0 msgs drpd due
to no support in the usr app
Deprecated SGSN Performance
Commands
This section
identifies SGSN performance commands deprecated in release 14.0.
SGSN Security Management
Changes as of November 30, 2012
This section provides
information on SGSN security management changes in release 14.0.
SGSN Feature Changes
as of November 7, 2012
This section
provides information on SGSN feature changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the ASR 5000 Serving GPRS
Support Node Administration Guide for this release.
New SGSN Features
This section
identifies SGSN features new in release 14.0.
Release 8 Specific
IEs Supported for MAP
The following Release
8 IEs, for MAP, 3GPP specificationTS 29.002, are supported.
- Update GPRS Location
- Req:
- Supported RAT Types
Indicator
- EPS Info
- Serving Node Type Indicator
- Supported Features
- Used RAT Type
Update
GPRS Location - Resp:
- SGSN-MME Separation
Support Indicator
Insert Subscriber Data - Req:
- EPS Subscription Data
- Roaming Restricted
In SGSN/MME Due To Unsupported Feature
Delete
Subscription Data - Req:
- EPS Subscription Data
Withdraw
Send Authentication Info - Req:
- Requesting Node Type
(New enums to be added)
- Number of additional
requested vectors
- Additional requested
Vectors are for EPC
READY FOR SM - Req:
- Additional Alert Reason Indicator
Modified SGSN Features
This section
identifies SGSN features modified in release 14.0.
Defaults Included
for RANAP ARP IE
Previous Behavior: If
ARP mapping was not configured in the APN profile with the ranap allocation-retention-priority-ie,
then the SGSN was not sending the ARP IE in the RANAP message even
if ranap arp-ie was
configured for the RNC under the IuPS service configuration.
New Behavior: Default
function has changed so that even if ARP mapping has not been configured
in the APN profile, the SGSN will send out default values in the
RANAP message when ranap
arp-ie is configured for the RNC under the IuPS service configuration.
SGSN Configuration
Management Changes as of November 7, 2012
This section
provides information on SGSN configuration command changes in release
14.0.
IMPORTANT:
For more information
regarding commands in this section, refer to the GPRS/UMTS
Command Line Interface Reference for this release.
New SGSN Configuration
Commands
This section
identifies new SGSN commands available in release 14.0.
peer-nri-length
New command enables
the SGSN to use NRI-FQDN based DNS resolution for non-local RAIs
when selection of the call-control profile is based on the old-RAI
and the PLMN Id of the RNC.
Call Control Profile
Configuration Mode
peer-nri-length <length>
remove peer-nri-length
Modified SGSN Configuration
Commands
This section
identifies SGSN commands modified in release 14.0.
SGSN Performance
Management Changes as of November 7, 2012
New SGSN Bulk Statistics
This section
identifies new SGSN bulk statistics available in release 14.0.
Modified SGSN Bulk
Statistics
This section
identifies modified SGSN bulk statistics available in release 14.0.
Deprecated SGSN Bulk
Statistics
This section
identifies SGSN bulk statistics deprecated in release 14.0.
New SGSN Performance
Commands
This section
identifies new SGSN performance commands available in release 14.0.
Modified SGSN Performance
Commands
This section
identifies modified SGSN performance commands available in release 14.0.
show port
New keyword verbose displays
port utilization data with kilobyte accuracy using decimal points.
Exec Mode
show port utilization
table verbose
There are no new fields
added to the display.
Deprecated SGSN Performance
Commands
This section
identifies SGSN performance commands deprecated in release 14.0.
SGSN Security Management
Changes as of November 7, 2012
This section provides
information on SGSN security management changes in release 14.0.
SGSN Feature Changes
as of September 28, 2012
This section
provides information on SGSN feature changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the ASR 5000 Serving GPRS
Support Node Administration Guide for this release.
New SGSN Features
This section
identifies SGSN features new in release 14.0.
AAA Changes To Support
Location Services (LCS) Feature
The Location Services
(LCS) feature in SGSN provides the mechanism to support mobile location
services for operators, subscribers and third party service providers.
AAA changes have been made to support the LCS feature. A new CDR
type Mobile Terminated Location Request CDRs (LCS-MT-CDR) is introduced.
LCS-MT-CDRs support the standard dictionaries.
For detailed information
on LCS-MT-CDRs, refer to the Cisco
ASR 5x00 GTPP Interface Administration and Reference manual.
The accounting command
in GPRS Service Configuration Mode and SGSN Service Configuration
Mode has been modified to include a new keyword lcs mt-cdr,
to enable/disable the generation of LCS-MT-CDRs. New counters
and statistics have been introduced to support LCS-MT-CDRs.
APN Redirection per
APN with Lowest Context-ID
The APN Redirection
per APN with Lowest Context-ID feature adds the flexibility to select the
subscription APN with the least context ID when the APN is not found
in the subscription. SGSN already provides sophisticated APN replacement
with support for first-in-subscription, default APN, blank APN,
and wildcard APN. This latest feature works along similar lines providing
further flexibility to the operator in allowing activations when
the MS requested APN is incorrect, misspelled, or not present in
the subscription.The SGSN's APN selection procedure is based on
3GPP 23.060 Annex A, which this feature extends based on CLI controls
under the APN Remap Table configuration mode.The APN Redirection
per APN with Lowest Context-ID feature is selected within the CLI
using a new keyword in the APN Remap Table configuration mode.
Commandguard
Operators can accidentally
enter configuration mode via CLI or file replay. To protect against
this, SGSN supports a new commandguard CLI
command, commandguard,
which is disabled by default, can only be enabled or disabled from
the Global Configuration mode. When commandguard is
enabled it affects the configure and autoconfirm CLI commands
by causing them to prompt (Y/N) for confirmation. When
autoconfirm is enabled commandguard has
no affect. The commandguard state
is preserved in the SCT and, when enabled, is output by the various
variants of the show
config CLI command.
Disassociated DSR
Support on the S4-SGSN
The S4-SGSN now supports
the disassociation of the SGSN and EGTP applications for a Delete
Session Request in a certain scenario. In this scenario, the SGSN
application instructs the EGTP facility to send the Delete Session
Request to the SGW and not respond back to the SGSN application
to confirm the action. Since the SGSN application is no longer waiting
for a response from the EGTP facility, there will be reduced internal
communication between the SGSN and EGTP. The EGTP facility will
handle retransmissions of the DSR request, thereby eliminating the possibility
of hanging sessions at the SGSN.
GMM-Cause for MAP-Cause
for ‘roaming-not-allowed’
It is now possible for
the operator to configure the desired reject cause code for map-cause ‘roaming-not-allowed’ when
sending GMM-Reject to the UE. Cause options include:
- gprs-serv-and-non-gprs-serv-not-allowed
- gprs-serv-not-allowed
- gprs-serv-not-in-this-plmn
- location-area-not-allowed
- network-failure
- no-suitable-cell-in-this-la
- plmn-not-allowed
- roaming-not-allowed-in-this-la
GTP Echo-Specific
Retransmissions Timer
Previously, the retransmission-timeout
parameter for the SGSN's Gn interface was common for GTP-C echo
and non-echo messages. A single "fixed-retransmission" timer (explicitly configured
via CLI) made it difficult for operators to fine tune this timer
to ensure fast failover to an alternative gateway, yet not have
all existing tunnels to a GGSN disconnected due to one or two local
GTP echo messages. Now, the SGSN supports different retransmission-timeout
values for GTP-C echo and non-echo messages. The idea is to prevent
early detection of path failure in cases of delayed echo responses
due to congestion in the network.
Now, the SGSN supports
two echo-retransmission mechanisms for both GTP-C and GTP-U based
on how retransmission-timeout is calculated, whether statically
or dynamically. One mechanism is the echo-retransmission default,
the fixed-retransmission timer, which is configured with a fixed
value. The second mechanism is the exponential-backoff timer for
which retransmission-timeout is not explicitly configured but calculated
dynamically based on RTT values of previous echo transmissions.
gtpv2 Protocol Support
for SRNS Relocation on the S4-SGSN
As part of the S4-SGSN Support for
Intra- and Inter-SGSN SRNS feature, the software has been enhanced
to support the use of the gtpv2 (egtp) protocol to support:
- Inter-SGSN SRNS relocation
over the S16 interface
- MME - SGSN SRNS relocation
over the S3 interface
Ignore Context-ID
During 4G/3G Handovers
HSS and HLR, when operating
as separate network nodes, are required to use the same context-ID
for a given APN-configuration of a subscriber. During inter-RAT
cell re-selections and handovers between 2G/3G and 4G,
if the SGSN does not find a matching APN-configuration for the given
context-ID learnt from the peer node, then the PDP does not get
established. This could result in SRNS relocation failures when
none of the PDP's learnt from the SGSN has a matching context-ID
in the HLR.
New commands have been
added to enable the operator to configure the SGSN to ignore the context-ID
provided by the peer and to use the PDP- type and address information
to search through HLR subscription and to update the context-ID
information within the PDP. For details, refer to the description
for the rau-inter command
under the Call-Control
Profile Configuration Mode Commands section of the Cisco ASR
5x00 GPRS / UMTS Command Line Interface Reference.
Location Services
LoCation Services (LCS)
on the SGSN is a 3GPP standards-compliant feature that enables the
SGSN to collect and use or share location (geographical position)
information for connected UEs in support of a variety of location
services, such as location-based charging and positioning services.
The SGSN uses the Lg interface to the gateway mobile location center
(GMLC), which provides the mechanisms to support specialized mobile
location services for operators, subscribers, and third party service
providers. Use of this feature and the Lg interface is license controlled.
A variety of new commands
are used to configure this feature and they are identified in the New SGSN Configuration
Commands section of this document. For details about this feature
and its configuration, refer to the Location Services section
of the SGSN Administration
Guide.
Lock/Shutdown
the BSC from the SGSN
When the SGSN returns
to Active state, after scenarios such as rebooting or reloading,
all the BSCs that had been connected to the SGSN would attempt to
re-establish connections. This could result in two serious problems
for operators:
- high CPU usage in the
SGSN where too many BSC/RNCs were connected.
- network overload when
other network nodes cannot match the SGSN's capacity.
The SGSN now supports
a Lock/Shutdown feature that provides a two prong solution.
CPU Usage Solution: Staggering the BSC auto-learning procedures
when the SGSN re-loads will help to reduce the high CPU usage. This
can be achieved by the operator locking the NSE/BSCs from the
SGSN before reboot/reload and then unlocking them one-by-one
to avoid high CPU usage.
Network Overload Solution:
A new timer, SNS-GUARD, has been added to clean-up resources if
the SNS procedure does not complete properly, whether or not the
BSC is administratively locked. Now the SGSN starts this timer after
sending SNS-SIZE-ACK and the BSC information will be removed, if
the auto-learning clean-up procedure does not complete before the
timer expires.
A series of new commands
and keywords has been added to enable the operator to configure this
new administrative Lock/Shutdown the BSC functionality
as part of 'interface management' configuration. For details, refer
to the SGSN Global Interface
Management section of the Cisco
ASR 5x00 GPRS / UMTS Command Line Interface Reference.
MS, PGW and HSS Initiated
PDP Context Modification Procedure Support
The S4-SGSN now supports
the following MS and network initiated PDP modification procedures
on the S4-SGSN:
- 3G MS initiated PDP modification
procedure
- 2G MS initiated modification
procedure
- 3G PGW Initiated PDP
modification procedure
- 2G PGW initiated bearer
modification procedure
- 3G HSS initiated PDP
modification procedure
- 2G HSS initiated bearer
modification procedure
S4-SGSN Support for
Intra- and Inter-SGSN SRNS Relocation
SRNS relocation is the
method defined in 3GPP TS 23.401 for connected mode inter-RAT handovers
from E-UTRAN to UTRAN or UTRAN to E-UTRAN networks. The SGSN already supports
SRNS relocation across the Gn interface. The S4-SGSN now also supports
SRNS relocation for the following cases across the S3 (S4-SGSN to
MME) and S16 (S4-SGSN to S4-SGSN) interfaces:
- Intra-SGSN SRNS relocation
- Inter-SGSN SRNS relocation
over the S16 interface
- UTRAN-to-E-UTRAN connected
mode Inter-RAT handover over the S3 interface
- UTRAN-to-E-UTRAN connected
mode Inter-RAT handover over the S3 interface
S4-SGSN Support for
ISD / DSD Message Handling and HSS Initiated Bearer Modification
ISD / DSD Message
Handling
Insert Subscriber Data
(ISD) and Delete Subscriber Data (DSD) messages are generated by the
HSS/HLR. These messages are used to communicate the subscribers
current subscription data to the S4-SGSN. The subscription data
for a subscriber can include GPRS subscription data or EPS subscription
data or both.
The PDP is either modified
or deleted based on the subscription data received by the S4-SGSN.
The S4-SGSN deletes the PDP context if any form of barring is detected
or if the APN-name or PDP-type of the PDP address is changed. The
S4-SGSN modifies the PDP if QoS is changed or APN-AMBR is changed
(in case of EPS subscription).
If a PDP modification
is required based on the subscription data received but the associated UE
is disconnected or in an inactive state, such PDP contexts are deleted
by the S4-SGSN.If the UE is connected or in a ready state, the S4-SGSN
sends an updated bearer command (with subscribed QoS) to the S-SGW
or P-GW and the P-GW initiates a PDP modify procedure.
The Modify bearer command
is a notification sent to the S-GW/P-GW which notifies
a change in the subscribed QoS. The message is sent to S-GW/P-GW
if the UE is in ready or connected state. Modify Bearer command
is not sent when the PDP is in preserved state and when ISR is active,
in such cases the S4-SGSN initiated modify request using Modify
Bearer Request updates the QoS to the S-GW/P-GW after the
PDP is active or UE activity is detected on S4-SGSN respectively.
Support for PDN Type
IPv4_OR_IPv6 (3) on the S4-SGSN
To comply with 3GPP TS
29.272, the S4-SGSN now supports a PDP type value of IPv4_OR_IPv6
(3) sent from the Home Subscriber Server (HSS).
This value is used to
indicate that the PDN can be accessed either in IPv4 mode, or in
IPv6 mode, but not from UEs supporting dualstack IPv4v6. This value
is only used as part of the APN subscription context, as an authorization
mechanism between the HSS and MME.
IMPORTANT:
The PDP type value
of IPv4_OR_IPv6 will never be used as a requested
PDN Type from the UE, since UEs use only one of their supported
PDN Types, i.e., IPv4 only, IPv6 only or IPv4v6 (dualstack).
Modified SGSN Features
This section
identifies SGSN features modified in release 14.0.
Change to GTP_SGSN_CONTEXT_ACK_MSG
'cause' IE
Previous Behavior: Earlier
when SGSN ctxt ack is sent in the scenarios noted below, then the
message contains the "gtp authentication failure" in the IE "cause".
Scenario:
- ISRAU in 3G
- SGSN ctxt response with
No IMEISV
- Identity request to
MS
- Identity response with
No identity
- SGSN ctxt ack
New Behavior: The
value in "cause" IE in GTP_SGSN_CONTEXT_ACK_MSG is
changed for a specific scenario during ISRAU in 3G. Now the cause
code is "GTP_REQUEST_ACCEPTED" in IE "cause".
Change in LORC Status
in DPCR for Specified Scenario
Previous Behavior: In
the scenario noted below, the LORC status was not updated when PDP
contexts deactivated and, while sending DPCR, the correct LORC status
was not being included even if the LORC status was "UE is back in
Radio".
- Precondition:
- Enable LORC Feature in
the apn-profile for sending LORC to GGSN.
- Enable IU release cause
in iups-service.
- Scenario:
- Attach & activate
in 3G.
- Send IU Release Request
- SGSN sends IU Rel Cmd,
UPCQ with LORC "LORC detected for UE".
- UPCR, Iu Release Complete.
- Send DPCQ from the GGSN.
- Paging.
- Service Request for Paging,
common ID, Sec mode command, complete.
- After Iu is established,
Deactivate Request, Accept.
- DPCR is sent by SGSN
with LORC status.
New Behavior: Now
the LORC status is updated when PDP contexts are deactivated and
the LORC status "UE is back in Radio" is included in DPCR.
Change in Cancel-Location
Behavior
Previous Behavior: During
a 2G call, when Cancel Location was received after Attach Accept
is sent, the SGSN was not sending Detach Request.
New Behavior: Now
during a 2G call, if Cancel Location is received after Attach Accept
is sent, then Page Req will be sent and page response Detach Request
will be sent to the MS. If Attach Accept has not been sent, the
Attach Reject will be sent.
Changes in Traps for
SS7 Congestion
Previous Behavior: When
the SGSN receives a congestion indication (SCON) for a remote code
(PC) from a signaling gateway (SG), this results in an SS7PCCongested
trap. So if the SGSN receives an indication that the remote has
become unavailable (DUNA) after receiving a congestion indication
and without receiving a congestion cleared indication, then the SGSN
generates:
- SS7PCCongestionCleared
- SS7PCUnavailable
New Behavior: When
the SGSN receives a congestion indication (SCON) from a signaling
gateway (GS), which is followed by an indication that the remote
has become unavailable (DUNA) without receiving a congestion cleared
indication, then the traps generated are:
- SS7PCCongested
- SS7PCUnavailable
Extensions Added to
Initial UE Message Extensions
Previous Behavior: Previously,
the Initial UE Message Extension did not contain any of the following
IE Extensions: CSG ID, Cell Access Mode, and L-GW Transport Layer Address
and the extensions were not supported by the SGSN in Mon-Pro.
New Behavior: Per
3GPP TS 25.413, CSG ID, Cell Access Mode, and L-GW Transport Layer
Address extensions have been added to the Initial UE MEssage Extensions
and they display in Mon-Pro in RANAP if they are provided by the MS.
Flush-LL Message
Sent to BSC When Intra-RAU Occurs in SGSN from a Different Cell
Previous Behavior:
In a certain scenario, a Flush-LL message was not sent to the BSC.
-
Scenario:
- Attach a subscriber
in 3G.
- Inter-RAT RAU to 2G
occurs in foreign TLLI.
- During RAU accept retries,
suspend and suspend ack occurs with the new local TLLI.
- Intra RAU again occurs
with the local TLLI derived from the PTMSI of the previous RAU Accept
Message (from a different cell).
- The Flush LL message
is not sent to the old BSC.
New Behavior: In
this scenario, the Flush-LL message now will be sent to the BSC.
Impact: The number
of Flush-LL messages increases if this scenario occurs in the network.
In/Outbound
Stream Control Enhanced
Previous Behavior: The
maximum configurable CLI limit for sctp-max-out-strms was
set to 65535 even though internally the number was capped at 16
as the maximum number of streams supported.
New Behavior: The
maximum configurable CLI limit for sctp-max-out-strms is
now 16, the default limit. To expand the operators control of streaming,
a configurable parameter to control inbound streaming - sctp-max-in-strms -
has been made accessible in the CLI.
Impact: For outbound
streaming with sctp-max-out-strms,
backward compatibility is maintained. For inbound streaming, the customer
can configure the maximum number of streams, up to 16, to accommodate
reception needs from the peer - hence stream negotiation is improved
and complete.
Note:
To ensure backward compatibility,
the CLI range from “17” to “65535” has
been deprecated. If the user provides a value in the deprecated
range, a warning message will be displayed.
ISR Deactivation Cause
Value and Node Value Sent in Delete Session Request
Previous Behavior:
When the Idle Mode Signaling Reduction feature was enabled on the
S4-SGSN, and a UE initiated a GPRS Detach, the S4-SGSN was sending
the Indication Flag IE to the SGW in the Delete Session Request.
New Behavior: In
this scenario, the Indication Flag is no longer sent, Instead, the S4-SGSN
sends the cause value (ISR Deactivation) and Node Type to the SGW
in the Delete Session Request message.
License Control for
Access-Type
Previous Behavior: Access-type
keyword options "gprs" and "umts" for commands in the Call-Control
Profile configuration mode were generally available.
New Behavior: The
access-type options "gprs" and "umts" for commands in the Call-Control
Profile configuration mode will only be accessible if the SGSN service
license is installed.
License Control for
Location Reporting
Previous Behavior:
Some configuration commands related to Location Reporting functionality
were available and configurable even if the appropriate license
was not enabled.
New Behavior: The location-reporting command
in the Call Control Profile configuration mode is now available
and configurable only if the specified license is enabled.
License Control for
S4-SGSN Configuration Commands
Previous Behavior:
Some configuration commands related to S4-SGSN functionality were
available and configurable even if the appropriate licenses were
not enabled.
New Behavior: The
following S4-SGSN configuration commands now are available and configurable
only if the specified license is enabled:
Table 1. License Controlled
Commands on the S4-SGSN
Command |
CLI
Mode |
Required
License |
associate tai-mgmt-db
|
SGSN Service Configuration
|
SGSN S4 License
|
associate tai-mgmt-db
|
GPRS Service Configuration
|
SGSN S4 License
|
associate network-global-mme-id-mgmt-db
|
SGSN Service Configuration
|
SGSN S4 License
|
associate network-global-mme-id-mgmt-db
|
GPRS Service Configuration
|
SGSN S4 License
|
gmm t3323-timeout
|
SGSN Service Configuration
|
Idle Mode Signaling Reduction
|
idle-mode-signaling-reduction
|
Call Control Profile Configuration
|
Idle Mode Signaling Reduction
|
sgsn-core-nw-interface
|
Call Control Profile Configuration
|
SGSN S4 License
|
LORC Private Extension
Included in DPCQ during Specific Scenarios
Previous Behavior: In
scenarios similar to the one described below, where the SGSN locally
deactivated a PDP context without informing the MS, then the SGSN
(with LORC feature enabled) sent DPCQ to the GGSN without including
the LORC private extension.
- Precondition:
- loss-of-radio-coverage
ranap-cause 46 (in iups-service)
- gtp private-extension
loss-of-radio-coverage send-to-ggsn send-to-peer-sgsn (in apn-profile)
- Scenario:
- Attach in 3G.
- Activate with background
class.
- Iu Release Request, Cmd.
- UPCQ, DL data, UPCR.
- Iu Release Complete,
UPCR.
- PTMSI attach in 3G.
- Common Id, Security mode
cmd, complete.
- After Accept.
- DPCQ, DPCR.
New Behavior: In
scenarios similar to the one described above, where the SGSN locally
deactivates a PDP context without informing the MS, then the SGSN
(with LORC feature enabled) sends DPCQ, including the LORC private
extension, to the GGSN
LORC IE Included
in DPCQ Triggered by Inter-RAT RAU Rejects
Previous Behavior:
In a scenario where the SGSN locally deactivates a PDP context without
informing the MS, and when the LORC feature is enabled, the DPCQ
sent to GGSN did not include the LORC private extension.
-
Precondition:
- loss-of-radio-coverage
ranap-cause 46 (in iups-service)
- gtp private-extension
loss-of-radio-coverage send-to-ggsn send-to-peer-sgsn (in apn-profile)
-
Scenario:
- Attach in 3G (with access
restriction for 3G)
- Activate in 3G (with
background class)
- Iu Release Request,
Cmd
- UPCQ, DL data, UPCR
- Iu Release Complete,
DL Data
- IRAT RAU in 2G
- RAU Reject with cause
13
- DPCQ
New Behavior: In
this scenario the DPCQ sent to the GGSN now includes the LORC private
extension.
Impact: The data
count while the MS is in the LORC state is more accurate.
New S-CDR Field Support
for custom33 Dictionary
Previous Behavior:
The S-CDR field “SGSN Change” is not present in custom33
dictionary.
New Behavior: The
S-CDR field “SGSN Change” has been included in custom33
dictionary. This field is the first record after an inter-SGSN routing
area update. The field “SGSN Change” is populated
in the custom33 dictionary by default. CLI support has been provided
to disable this field. A new keyword sgsn-change is included
in the command gtpp
attribute to optionally disable the S-CDR field “SGSN
Change” for custom33 dictionary. The keyword is license restricted.
Note:
For custom33 users,
upgrading from pre-R14.0 release to R14.0 and higher releases it
is recommended that this field is disabled before an upgrade to
avoid billing issues.
For detailed information,
refer to the Cisco ASR
5x00 GTPP Interface Administration and Reference manual.
NF capability decoding
Previous Behavior:
The length of Spare bits in MS Network Capability is 2 bits and
Decoding of NF Capability bit is absent. If the MS Network Capability
bit is provided by the MS, NF Capability is not decoded in MS Network
Capability in mon-pro as a part of GMM Message and Spare bits are
Decoded as 2 bits. 2 bit Spare Bits are decoded instead of 1 bit
NF Capability Bit Field and 1 bit Spare Bit Field.
New Behavior: Code
changes are added to decode the NF Capability Bit under MS Network
Capability octets. The Length of Spare bits in MS Network Capability
is reduced to 1 bit from 2 bits, and decoding of 1 bit length value
'NF capability’ is added. NF Capability now is decoded
in MS Network Capability.
PS Paging Change
for Clear Subscribers All Command
Previous Behavior:
In a certain scenario, subscribers were not cleared when the MS
responded to a Paging Request from the SGSN. To authenticate the
subscriber, the SGSN performed an SAI. If the SAI failed with type
Network Failure, the SGSN re-initiated the Paging Request and did
not clear the subscribers.
-
Precondition: A
call-control-profile is created and configured with the authenticate service-request parameter.
-
Scenario:
- Attach in 3G
- IU Released
- PMM-IDLE state
- Execute the clear subscribers all command
in Exec Mode
- The SGSN pages the MS
- The MS sends the Service
Request with a type Paging Response
- SAI response returned
as SYSTEM FAILURE
- The SGSN sends a service
reject with a cause of Network Failure
New Behavior: The
SGSN will not re-initiate the Paging Request if the SAI fails due
to a Network Failure. The SGSN clears the subscribers with an Implicit
Detach.
RAU Reject Cause Corrected
when AIA and UGL with 5003
Previous Behavior:
Authentication information is sent from the SGSN to the Diameter
(HSS) and the Diameter returns an error code 5003 (DIAMETER_AUTHORIZATION_REJECTED).
The SGSN rejects the call with an incorrect GMM cause code value
"Network Failure".
New Behavior: As
per 3GPP TS 29272 v9.7, the correct cause code to be sent in this
scenario is "15 - No Suitable Cells In Tracking Area". The mapping
has been corrected and the GMM cause now displays "No Suitable Cells
In Tracking Area" when Diameter Returns reject cause as 5003 in
both the cases AIA and UGL.
Support for IE "SubscriberProfileIDforRFP"
in added Direct Tx Message
Previous Behavior:
IE "SubscriberProfileIDforRFP" Cause Code:202, is not present in
the Direct Tx Message, if MS provides a "SubscriberProfileIDforRFP",
a Decode Error is displayed in Mon_Pro.
New Behavior: IE
"SubscriberProfileIDforRFP" added in Direct Tx Message, if MS provides
a "SubscriberProfileIDforRFP" it will be decoded in the Direct Tx
message.
SGSN Configuration
Management Changes as of September 28, 2012
This section
provides information on SGSN configuration command changes in release 14.0.
IMPORTANT:
For more information
regarding commands in this section, refer to the GPRS/UMTS
Command Line Interface Reference for this release.
New SGSN Configuration
Commands
This section
identifies new SGSN commands available in release 14.0.
associate
New command associates
the MAP service configured for the LCS with the Location Service
configuration:
Location-Service Configuration
Mode
[ no ] associate
map-service <map_serv_name>
commandguard
New command prevents
operators from accidentally entering configuration modes, via CLI or
file replay, by enabling prompting for autoconfirm and configuration
commands:
Global Configuration
Mode
commandguard
[ default | no ] commandguard
enb-direct-data-forward
A new command has been
implemented to enable and disable the setup of indirect data forwarding
tunnels (IDFT) between the eNodeB and the RNC via the SGW during
connected mode handovers.
RNC Configuration Mode
enb-direct-data-forward
no enb-direct-data-forward
gmlc
A new command identifies
the gateway mobile location center (GMLC) for the SGSN when using
Location Services.
MAP Service Configuration
Mode
gmlc { isdn <E.164#> | point-code <point_code> } [ gsn-address <ipv4_address> ] [ source-ssn <ssn> ]
no gmlc { isdn <E.164#> | point-code <point_code>
interface-management
A new command enters
the SGSN global interface management configuration mode:
SGSN-Global Configuration
Mode
interface-management
interface-management
A new command maps the
interface management configuration to the NSE-ID or to an NSE-name
to identify the peer NSE/BSC:
Interface Management
Configuration Mode
[ no ] interface
gb peer-nsei id nsei_id name nsei_name
interface-management
A new command locks
or shuts down the interface towards the NSE based on either the NSE-ID
or the NSE-name. The “no” form of the command
unlocks the interface towards the NSE/BSC.
Interface Management
Configuration Mode
[ no ] lock-interface
gb peer-nsei { name nsei_name | id nsei_id }
lcs-mo, lcs-mt, lcs-ni
3 new commands restrict
or allow location requests (mobile-terminating, mobile-originating,
or network-induced) by access-type and associate the LCS with operator
policies for granular control
Call-Control Profile
Configuration Mode
lcs-mo { allow | restrict } access-type { gprs | umts }
lcs-mt { allow | restrict } access-type { gprs | umts }
lcs-ni { allow | restrict } access-type { gprs | umts }
location-services
A new command is used
to create an instance of the location service configuration and
to access the Location Service configuration mode.
Context Configuration
Mode
location-services <loc_serv_name>
no location-services
location-services
A new command is used
to enable or ‘start’ the new Location Services
(LCS) functionality on the SGSN. The negative form of the command
can be used to disable or ‘stop’ LCS.
SGSN-Global Configuration
Mode
location-services
no location-services
release-compliance
The release-compliance command
is implemented to enable or disable the sending of EPS information
in the Update GPRS Location (UGL) Request message to the HLR.
HLR Configuration Mode
release-compliance release-8
no release-compliance
sctp-max-in-strms
Enables the operator
to determine the maximum number of inbound streams to receive from the
peer.
PSP Configuration Mode
sctp-max-in-strms < max_in_strms
>
default sctp-max-in-strms
timeout
New command configures
the LCSN timer for the Location Service configuration:
Location-Service Configuration
Mode
timeout lcsn <10-20>
Modified SGSN Configuration
Commands
This section
identifies SGSN commands modified in release 14.0.
accounting
A new keyword lcs mt-cdr is
included in the command accounting,
this keyword is used to enable/disable the generation of
LCS-MT-CDRs.
GPRS Service Configuration
Mode
accounting { cdr-types { mcdr | scdr | sms { mo-cdr | mt-cdr } } | lcs { mt-cdr } | smbmscdr } + | context cntx_name }
SGSN Service Configuration
Mode
accounting ( cdr-types { mcdr | scdr | sms { mo-cdr | mt-cdr } } | lcs { mt-cdr } | smbmscdr } + | context cntx_name }
apn-selection-default
A new keyword lowest-context-id enables
the operator to configure selection of the subscription APN with
the least context-ID when the APN is not found in the subscription.
APN Remap Table Configuration
Mode
[ no ] apn-selection-default { first-in-subscription | lowest-context-id | network-identifier <apn_net_id> }
aps
The default keyword
has been added to the aps command
in this release.
Card Configuration Mode
default aps
IMPORTANT:
default aps is
the equivalent of entering aps 1+1 uni-directional
non-revertive.
gtpc
A new keyword echo-retransmission and accompanying
filters (exponential-backoff, min-timeout,
smooth-factor,
timeout)
enable the operator to configure retransmission parameters for GTPC
echo messages or to use system defaults by using the default keyword.
SGTP-Service Configuration
Mode
gtpc echo-retransmission { exponential-backoff [ min-timeout <1-20> | smooth-factor <1-5> ] | timeout <1-20> }
default gtpc echo-retransmission
gtpp attribute
A new keyword sgsn-change is
included in the command gtpp
attribute, this keyword is used to optionally disable
the inclusion of the S-CDR field “SGSN Change” in
custom33 dictionary. The keyword is license restricted, specific
to SGSN and is enabled by default.
GTPP Server Group Configuration
Mode
gtpp attribute { camel-info | cell-plmn-id | diagnostics | duration-ms | imei | local-record-sequence-number | msisdn | node-id-suffix STRING | plmn-id | rat | record-extensions rat | served-pdp-pdn-address-extension | sgsn-change |sms { destination-number | recording-entity | service-centre } } +
default gtpp attribute { cell-plmn-id | diagnostics | duration-ms | imei | local-record-sequence-number | msisdn | plmn-id | rat | record-extensions rat | served-pdp-pdn-address-extension | sgsn-change |sms { destination-number | recording-entity | service-centre } }
no gtpp attribute { cell-plmn-id | diagnostics | duration-ms | imei | local-record-sequence-number | msisdn | node-id-suffix | plmn-id | rat | record-extensions rat | served-pdp-pdn-address-extension | sgsn-change |sms { destination-number | recording-entity | service-centre } }
Note:
For SGSN specific custom33
dictionary, it is recommended to disable this keyword before an
upgrade to prevent billing issues.
gtpu
A new keyword echo-retransmission and accompanying
filters (exponential-backoff, min-timeout,
smooth-factor,
timeout)
enable the operator to configure retransmission parameters for GTP-U
echo messages or to use system defaults by using the default keyword.
SGTP-Service Configuration
Mode
gtpu echo-retransmission { exponential-backoff [ min-timeout <1-20> | smooth-factor <1-5> ] | timeout <1-20> }
default gtpc echo-retransmission
local-cause-code-mapping
A new keyword, map-cause-code,
configures the GMM reject cause code to send to a UE for map cause
'roaming not allowed'
Call-Control Profile
Configuration Mode
local-cause-code-mapping
map-cause-code roaming-not-allowed gmm-cause-code gmm-cause
remove local-cause-code-mapping
map-cause-code roaming-not-allowed
ns-timer
A new keyword, sns-guard,
sets the wait time for the auto-learn procedure to complete proper
clean-up of learnt BSC/NSE information.
Network Service Entity
IP-Local Configuration Mode
ns-timer sns-guard seconds
default ns-timer sns-guard
peer-mme
The fallback-for-dns keyword
is now supported in the peer-mme command.
Enabling this keyword enables the S4-SGSN to support fallback to
the locally configured peer-mme address in the event a DNS query
times out or fails.
Call Control Profile
Configuration Mode
peer-mme mme-groupid <lac val> mme-code <rac value> prefer { fallback-for-dns | local } address { <ipv4_address> | <ipv6_address> } interface { gn [ s3 ] | s3 [ gn ] }
peer-mme
The CLI online help
for this command has been modified. A warning has been added that informs
the user that changing the currently configured prefer option
for the same RAC and LAC via the peer-mme command overwrites
the previously configured prefer setting
for all interfaces.
ranap
A new keyword arp-ie is
added to enable or disable the inclusion of ARP-IE in RAB assignment / Relocation
request RANAP messages per RNC.
RNC Configuration Mode
[ default | no ] ranap
arp-ie
rau-inter
New keyword makes it
possible to configure the SGSN to ignore the peer’s context-ID
and replace with PDP context-ID information based on the HLR subscription.
Call-Control Profile
Configuration Mode
[ default | no ] rau-inter
ignore-peer-context-id
sgsn imsimgr
Session Manager instance
ranges have been modified from a maximum of 4095 to a maximum of
384:
Exec Mode
sgsn imsimgr audit-with
sessmgr instance <1 - 384>
sgsn imsimgr
Session Manager instance
ranges have been modified from a maximum of 4095 to a maximum of
384:
Exec Mode
sgsn imsimgr add-record <integer> sessmgr instance <1 - 384>
sctp-max-out-strms
The system has always
capped the maximum number of outbound SCTP streams at 16 and now
the configurable range (1 - 16) has been modified to accommodate
the cap.
PSP Configuration Mode
sctp-max-out-strms < max_in_strms
>
default sctp-max-out-strms
Note:
To ensure backward compatibility,
the CLI range from “17” to “65535” has
been deprecated. If the user provides a value in the deprecated
range, a warning message will be displayed.
sgsn-address
The fallback-for-dns keyword
is now supported. Enabling this keyword enables the S4-SGSN to support
fallback to the locally configured peer-sgsn address in the event
a DNS query times out or fails.
Call Control Profile
Configuration Mode
sgsn-address rac <rac-id> lac <lac_id> [ nri <nri> ] prefer { fallback-for-dns | local } address { ipv4 <ip_address> | ipv6 <ip_address> } interface { gn | s16 }
sgsn-address
The CLI online help
for this command has been modified. A warning has been added that informs
the user that changing the currently configured prefer option
for the same RAC and LAC via the sgsn-address command
overwrites the previously configured prefer setting
for all interfaces.
Deprecated SGSN
Configuration Commands
This section
identifies SGSN commands deprecated in release 14.0.
aps
The no keyword
for the aps command
has been deprecated in this release.
Card Configuration Mode
no aps
IMPORTANT:
To disable APS, use the redundancy port-mode command in
the Card Configuration Mode.
authenticate detach
The CLI syntax for the
command authenticate
detach in the call-control-profile configuration mode
is modified to configure the authentication procedure during detach
only for UMTS access type. The “gprs” option is deprecated
and no longer valid.
Call Control Profile
Configuration Mode
[ no | remove] authenticate
detach [ access-type { umts | gprs } ]
SGSN Performance
Management Changes as of September 28, 2012
New SGSN Bulk Statistics
This section
identifies new SGSN bulk statistics available in release 14.0.
Modified SGSN Bulk
Statistics
This section
identifies modified SGSN bulk statistics available in release 14.0.
Deprecated SGSN Bulk
Statistics
This section
identifies SGSN bulk statistics deprecated in release 14.0.
New SGSN Performance
Commands
This section
identifies new SGSN performance commands available in release 14.0.
show location-service
A new show command displays
configuration for the Location Service parameters.
Exec Mode
show location-service
service { all | name <loc_serv_name> }
Modified SGSN Performance
Commands
This section
identifies modified SGSN performance commands available in release 14.0.
show call-control-profile
full all
The show call-control-profile
full all command output has been modified to provide the
configured DNS context associations for the PGW and SGW for the
S4-SGSN.
Exec Mode
show call-control-profile
full all
show cdr statistics
The output of this Exec
mode command has been modified to include two new statistics:
- Number of files pending
transfer: This statistic represents number of files that are present
in the directory "/records/***"
waiting to be transferred to the remote server.
- Number of files queued
transfer: This statistic represents the number of files that are currently
queued to transfer to the remote server.
Exec Mode
show cdr statistics
Note:
The Context Configuration
Mode edr-module active-charging-service has to be configured before
executing the show
cdr statistics command.
show configuration
The show configuration command
with keywords verbose and context name has been
enhanced to include LCS-MT-CDR information. LCS-MT-CDR is a new
accounting CDR type introduced to support the LCS feature.
The parameter ranap arp-ie is
displayed in the show
configuration output, if inclusion of ARP-IE in RAB assignment / Relocation
request RANAP messages per RNC is enabled.
The parameter no ranap arp-ie is
displayed in the show
configuration output, if inclusion of ARP-IE in RAB assignment / Relocation
request RANAP messages per RNC is disabled.
Exec Mode
show configuration verbose
show configuration context name
show configuration context name verbose
show gmm-sm statistics
SGW Change Statistics
were placed in the output of the show show gmm-sm statistics command.
These statistics have been removed. The equivalent SGW relocation
change statistics were already available, and remain, in the output
of the show s4-sgsn
statistics command.
Exec Mode
show gmm-sm statistics
The SGW Change Statistics
that were removed from the show gmm-sm statistics output
are:
- SGW Change Statistics
- Total S-GW Changes
- 3G SGW Changes
- Intra RAU (3G)
- Inter SGSN RAU over
S16 (3G)
- MME-SGSN RAU over S3
(3G)
- 2G SGW Changes
- Intra Rau (2G)
- Inter SGSN RAU over
S16 (2G)
- MME-SGSN RAU over S3
(2G)
As noted above, The
equivalent SGW relocation change statistics are still available
in the output of the show
s4-sgsn statistics command.
Exec Mode
show s4-sgsn statistics
... ... ...
S4 SGSN Statistics Summary:
SGW Relocations :
3G Intra SGSN RAU :
0 2G Intra SGSN RAU :
0
3G
Inter SGSN RAU (S16) : 0 2G
Inter SGSN RAU (S16) : 0
3G
MME-SGSN RAU (S3) :
0 2G MME-SGSN RAU (S3) :
0
Intra SGSN 2G to 3G
RAU : 0 Intra
SGSN 3G to 2G RAU : 0
... ... ...
show gmm-sm statistics
New counters have been
added to the output of this command to track attempted and successful
SRNS relocations between SGSNs and MMEs.
Exec Mode
show gmm-sm statistics
show gmm-sm statistics
verbose
New inter-GPRS Service
and inter-RAT / RAU / FSM counters expand RAU
failure and internal failure statistics. Some counters were removed
to avoid confusion regarding internal failures.
The following is a list
of new counters:
- Inter GPRS Srv Rau Requests:
- Inter GPRS Srv Rau Accepts:
- Inter GPRS Srv Rau Failures:
- Inter GPRS Srv Rau Success:
- No Matching Sgtp Service:
- No Matching Map Service:
- Inter RAT Requests
- Inter RAT Accepts:
- Inter RAT Failures
- Inter RAT Success
The following is a list
of removed counters:
- Alloc SMID Failed:
- Insert SMID Failed:
- No Sgtp inst:
- No Map inst:
- Inter RAT Requests:
show gmm-sm statistics
verbose
The command show gmm-sm statistics
verbose displayed incorrect counters when a 3G to 2G IRAT
is performed. The counter names have been changed.
"Radio-status-bad before
a" changed to "Radio-status-bad before auth"
"Radio-status-bad after
au" changed to "Radio-status-bad after auth”
Exec Mode
show gmm-sm statistics verbose
show gprsns statistics
New stats peg the number
of NS-UNITDATA packets received over an inactive NSVC link and handled
by the SGSN. Stats are pegged for facility sessmgr and linkmgr.
New counter “Number
of udata handled in inactive state” displays when the command includes
the msg-stats nse <nse> keywords
and either the facility
linkmgr all or the facility sessmgr all keywords.
Exec Mode
show gprsns statistics
msg-stats nse <nse> facility linkmgr all
show gprsns statistics
msg-stats nse <nse> facility sessmgr all
show gprsns statistics
msg-stats consolidated nse <nse>
show gprs-service
all
The show gprs-service all command
has been enhanced to include LCS-MT-CDR information. LCS-MT-CDR
is a new accounting CDR type introduced to support the LCS feature.
Exec Mode
show gprs-service all
show gtpp counters
The output of this command
is enhanced to include new counters related to LCS-MT-CDRs. The
updated output is obtained when the command is used with the keywords all, group name group_name and cgf_address cgf_address.
Exec Mode
show gtpp counters all
show gtpp counters group
name group_name
show gtpp counters cgf-address cgf_address
show gtpp statistics
The output of this command
is enhanced to include new counters related to LCS-MT-CDRs. The
updated output is obtained when the command is used with the keywords group name group_name, cgf_address cgf_address, debug-info and verbose debug-info.
Exec Mode
show gtpp statistics
show gtpp statistics
group name group_name
show gtpp statistics
cgf-address cgf_address
show gtpp statistics
debug-info
show gtpp statistics
verbose debug-info
show gtpp storage-server
The output of this command
is enhanced to include new counters related to LCS-MT-CDRs. The
updated output is obtained when the command is used with the keywords group name group_name and verbose.
Exec Mode
show gtpp storage-server statistics
show gtpp storage-server
statistics verbose
show gtpp storage-server
group name group_name
show iups-service
name
A new field, E-NodeB Direct Data Forwarding,
has been added to the output of the show iups-service name command
to indicate whether eNodeB direct data forwarding is enabled or
disabled. If the field reads Disabled,
the S4-SGSN uses indirect data forwarding tunnels (IDFT).
Exec Mode
show iups-service name <service_name>
show llc status
Session Manager instance
ranges have been modified from a maximum of 4294967295 to a maximum
of 384:
Exec Mode
show llc status gprs-service
<variable> sessmgr instance <1 - 384>
show map-service
all
The field 3GPP Release Compliance has
been added to the show map-service
all command output to indicate the configured 3GPP release compliance
setting. The 3GPP release compliance setting is configured with
the release-compliance command
in HLR Configuration Mode.
Exec Mode
show map-service all
show s4-sgsn statistics
all
More granularity has
been provided in the command output so that ISRAUs across both the S16
and S3 interfaces are tracked individually for SGW relocations.
Formerly, only one counter tracked both interfaces.
Exec Mode
show s4-sgsn statistics all
show s4-sgsn statistics
all
The command output has
been modified to show packet and byte queued and dropped statistics
for the S4-SGSN. These statistics are provided in the GTPU Statistics section
of the output.
Exec Mode
show s4-sgsn statistics all
show s4-sgsn statistics
all
A new section, IDFT Statistics,
has been added to the command output to provide counters that track
the number of indirect data forwarding tunnel (IDFT) packets and bytes
sent to and from the SGW.
Exec Mode
show s4-sgsn statistics all
show s4-sgsn statistics
all
The output of this command
has been enhanced to provide statistics related to the Inter- and Intra
SGSN SRNS feature, including:
- Intra- and Inter-SGSN
SRNS relocation counters added to the SGW Relocation Statistics output
section.
- SRNS procedure abort
counters in the new Procedure
Abort Statistics output section.
show session subsystem
The show session subsystem command
with the keyword facility has
been enhanced to include LCS-MT-CDR information. LCS-MT-CDR is a
new accounting CDR type introduced to support the LCS feature. New
LCS-MT-CDR related counters are provided.
Exec Mode
show session subsystem [ full | facility facility [ all | instance id ] ] [ verbose ] [ | { grep grep_options | more }]
show sgsn-fast-path
statistics
Session Manager instance
ranges have been modified from a maximum of 65535 to a maximum of
384:
Exec Mode
show sgsn-fast-path
statistics smgr-instance <1 - 384>
show sgsn sessmgr
memory statistics
The output of this command
has been enhanced to provide memory allocation information for the
PDN bundle level bearer information required during 3G PGW Initiated
PDP Bearer Modification.
Exec Mode
show sgsn sessmgr instance <instance number> memory statistics
... ... ...
|------------------------------------------------------------------|
SGSN-specific
Memory Statistics
|------------------------------------------------------------------|
| Entity | Blk User | blkSize | numAlloc | numFree
|
|------------------------------------------------------------------|
... ... ...
| SM
App | S4 PDN TransCb | 20 | 0 | 409 |
... ... ...
show sgsn-service
all
Exec Mode
The show sgsn-service all command
has been modified to correctly output the configured GMM T3323-timeout setting
in minutes. Previously, the output identified the setting in units
of seconds.
The show sgsn-service all command
has been enhanced to include LCS-MT-CDR information. LCS-MT-CDR
is a new accounting CDR type introduced to support the LCS feature.
Exec Mode
show sgsn-service all
show subscribers
gprs-only full all
In the PDN Gateway section
of the show subscribers
gprs-only full all command, the Name field has been
changed to FQDN and
the FQDN field now shows both the configured destination-host and destination-realm
for the subscribed FQDN. The FQDN is a concatenation of these two
items. The FQDN is a concatenation of both the destination-host
and destination-realm.
Exec Mode
show subscribers gprs-only
full all all
show subscribers
sgsn-only full all
In the PDN Gateway section
of the show subscribers
sgsn-only full all command, the Name field has been
changed to FQDN and
the FQDN field now shows both the destination host and destination
realm for the subscribed FQDN.
Exec Mode
show subscribers sgsn-only
full all all
Deprecated SGSN Performance
Commands
This section
identifies SGSN performance commands deprecated in release 14.0.
SGSN Security Management
Changes as of September 28, 2012
This section provides
information on SGSN security management changes in release 14.0.
SGSN Feature Changes
as of July 31, 2012
This section
provides information on SGSN feature changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the ASR 5000 Serving GPRS
Support Node Administration Guide for this release.
New SGSN Features
This section
identifies SGSN features new in release 14.0.
Modified SGSN Features
This section
identifies SGSN features modified in release 14.0.
Holding Iu Established
via Service Request
Previous Behavior: For
an Iu established as the result of a Service Request (signaling),
the SGSN would not wait for the iu-hold-timer to expire (unless “iu-hold-connection always” is
configured). The SGSN would immediately release the Iu after any
SM/SMS activity completes. If the Iu were established by
an RAU/Attach, the SGSN would consult the “follow-on-req” bit
in the RAU-Request/Attach-Request message. As this bit
is not part of the Service Request message, the SGSN assumed that
the MS just has a single activity to complete, and hence, the SGSN
would release the Iu after any activity (SM/SMS) completed.
New Behavior: The
SGSN now waits until the iu-hold-timer expires before releasing
the Iu. In addition, this behavior is controllable via a new CLI
command, refer to section New
SGSN Configuration Commands for syntax details.
SGSN Configuration
Management Changes as of July 31, 2012
This section
provides information on SGSN configuration command changes in release 14.0.
IMPORTANT:
For more information
regarding commands in this section, refer to the GPRS/UMTS
Command Line Interface Reference for this release.
New SGSN Configuration
Commands
This section
identifies new SGSN commands available in release 14.0.
service-request-follow-on
New command instructs
the SGSN (by default) not to release an Iu immediately but to wait for
the Iu-Hold-Timer expiry. A negative command would disable this
function.
IuPS Service Configuration
Mode
service-request-follow-on
[ default | no ] service-request-follow-on
Modified SGSN Configuration
Commands
This section
identifies SGSN commands modified in release 14.0.
random-value-in-iov-ui
New keyword in the llc command
enables the SGSN to send random IOV-UI values, with zeros sent as
the IOV-UI value in the XID messages by default.
GPRS Service Configuration
Mode
llc random-value-in-iov-ui
[ default | no ] llc
random-value-in-iov-ui
Deprecated SGSN Configuration
Commands
This section
identifies SGSN commands deprecated in release 14.0.
SGSN Performance Management
Changes as of July 31, 2012
This section provides
information on SGSN performance management changes in release 14.0.
IMPORTANT:
For more information
regarding bulk statistics in this section, refer to the Statistics and Counters
Reference for this release.
For more information
regarding commands in this section, refer to the UMTS Command Line Interface
Reference for this release.
New SGSN Bulk Statistics
This section
identifies new SGSN bulk statistics available in release 14.0.
Modified SGSN Bulk
Statistics
This section
identifies modified SGSN bulk statistics available in release 14.0.
Deprecated SGSN Bulk
Statistics
This section
identifies SGSN bulk statistics deprecated in release 14.0.
New SGSN Performance
Commands
This section
identifies new SGSN performance commands available in release 14.0.
Modified SGSN Performance
Commands
This section
identifies modified SGSN performance commands available in release 14.0.
show gmm-sm statistics
The output of this
Exec mode command has been modified to display appropriate reasons for
PDP overrides with the following new fields/counters:
- 2G Call Control Profile
IPv4v6 PDP Type Override Statistics
- Successful override
to IPv4:
- IPv4 activation success
after Override:
- Pv4 activation failure
after Override:
- Successful override
to IPv6:
- IPv6 activation success
after Override:
- IPv6 activation failure
after Override:
- IPv6 activation failure
after Override:
- Successful override
to IPv4:
- IPv4 activation success
after Override:
- IPv4 activation failure
after Override:
- Successful override
to IPv6:
- IPv6 activation success
after Override:
- IPv6 activation failure
after Override:
show gmm-sm statistics
gprs-service <gprs-name> nsei <nsei-id>
The output of this
Exec mode command has been modified to provide enhanced details
for attach failures per NSEI with new fields/counters:
- Inter RAT PS Only Routing
Area Update Failure Causes
- 2G-Failure due to Other
Ongoing Procedure
- Inter RAT Comb. Routing
Area Update Failure Causes:
- 2G-Failure due to Other
Ongoing Procedure:
- Intra Ra-Upd Routing
Area Update Failure Causes:
- 2G-Failure due to Other
Ongoing Procedure:
- Intra Combo. Routing
Area Update Failure Causes:
- 2G-Failure due to Other
Ongoing Procedure:
- Intra Periodic Routing
Area Update Failure Causes:
- 2G-Failure due to Other
Ongoing Procedure:
- Inter SGSN PS Only
Routing Area Update Failure Causes:
- 2G-Failure due to
Other Ongoing Procedure:
- Inter SGSN Comb. Routing
Area Update Failure Causes:
- 2G-Failure due to
Other Ongoing Procedure:
- Inter-System Attach
Statistics
- 2G-Attach
- 2G-Comb-Attach:
- 2G-Attach-Rej:
- 2G-Comb-Attach-Rej
- 2G-Attach-Acc
- 2G-Comb-Attach-Acc
- Gprs-Attach Failure
Causes:
- 2G-Failure Due to Other
Ongoing Procedure:
- Comb-Attach Failure
Causes:
- 2G-Failure Due to Other
Ongoing Procedure:
- GPRS FSM Attach Statistics:
- Inter Service PS Only
Routing Area Update Failure Causes:
- 2G-Failure due to Other
Ongoing Procedure:
- Inter Service Comb.
Routing Area Update Failure Causes:
- 2G-Failure due to Other
Ongoing Procedure:
- GPRS FSM Total RAU Statistics:
- Authentication And Ciphering
Response With SRES Mismatch:
- Total-Auth-Cipher-Resp
with Sres Mismatch:
- 2G-Auth-Cipher-Resp
with Sres Mismatch:
- Authentication And Ciphering
Reject:
- Total-Auth-Cipher-Rej
- 2G-Auth-Cipher-Rej
- Authentication and Ciphering
Reject Reasons:
- 2G-XRes Mismatch
- 2G-Too many SYNC Failures:
- 2G-Too many MAC Failures:
- 2G-Gsm Auth Unacc:
show gprs-service
all
The output of this
Exec mode command has been modified to track configuration for sending
random IOV-UI values in XID messages with the following new fields/counters:
- GMM accept procedure
: old tlli
- LLC IOVUI in xid-reset
: send
- LLC IOVUI val in xid-reset:
Random value
- LLC Reset VUR during
intra RAU : Disabled
- LLC detect overflow
: Disabled
Deprecated SGSN Performance
Commands
This section
identifies SGSN performance commands deprecated in release 14.0.
SGSN Security Management
Changes as of July 31, 2012
This section provides
information on SGSN security management changes in release 14.0.
SGSN Feature Changes
as of June 29, 2012
This section
provides information on SGSN feature changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the ASR 5000 Serving GPRS
Support Node Administration Guide for this release.
New SGSN Features
This section
identifies new SGSN features available in release 14.0.
2G and 3G Inter
-PLMN Intra-RAU Support on the S4-SGSN
The S4-SGSN supports
2G and 3G inter- and intra-PLMN intra RAU procedures. However, if
the new PLMN’s operator policy is configured to use the
Gn interface, the PDP contexts are not transferred from the S4 interface
to the Gn interface. In addition, the S4-SGSN currently does not support
the association of a different EGTP service for each PLMN.
2G and 3G Routing
Area Update Support on the S4-SGSN
The S4-SGSN supports
outbound Routing Area Update (RAU) procedures for a subscriber already
attached on that SGSN (that have PDP contexts anchored through S4
interface) and inbound RAU procedures for an EPC capable UE.
The following RAU procedures
are supported for both 2G and 3G services:
-
2G and 3G Intra-SGSN
RAU with and without S-GW relocation
-
2G and 3G Inter-SGSN/SGSN-MME
RAU with and without S-GW relocation across S16 and S3 interfaces
-
Intra-SGSN Inter-RAT
RAU with and without S-GW relocation
Accounting Path
Framework, New
The SGSN uses a new
accounting path framework to support PSC3 numbers of 8 million attached
subs and 16 million PDP contexts. In the old accounting path framework,
there was one AAA session per sub-session in the Session manager
and one archive session per sub-session in AAA manager. As part
of the new accounting path framework there is only one AAA session
per call in the Session manager and one archive session per call
in the AAA manager. Also, there is an additional accounting session
in the Session manager and the AAA manager per sub-session. The new
accounting path framework improves memory and CPU utilization and
prevents tariff or time limit delay. There are no changes in the
CLI syntax to support the new accounting path and the existing accounting
behavior of SGSN is not modified.
ASCII S-CDR Format
Support
The SGSN supports a
new custom dictionary (custom41) that is based on custom6. The new custom41
generates the S-CDR in ASCII format for post-processing by the external
mediation server. For detailed information, refer to the Cisco ASR 5x00 GTPP Interface
Administration and Reference.
CLI Control of Gr
or S6d Interface Selection on the S4-SGSN
The S4-SGSN supports
control over the selection of the S6d (Diameter) or legacy Gr interface
for PDP context operations. This allows flexible operator control
over interface selection for operational or administrative reasons.
This feature overrides any other criteria for the selection of the
P-GW or GGSN for PDP contexts. This feature is applicable only for
EPC-capable UEs.
New CLI commands have
been introduced to support this feature.
Custom GUTI Mapping
Support on the S4-SGSN
The S4-SGSN supports
the configuration of a custom list of MME group IDs for operators with
networks that have been configured with LACs in the 32768-65535
range for UMTS and GPRS coverage.
Once valid MME group
codes are configured, the S4-SGSN uses them to identify whether the
received LAC is a native LAC or a LAC mapped from a globally unique
temporary UI identifier (GUTI); i.e., an MME group code that is
part of a GUTI.
A new CLI command has
been introduced to support this feature.
Deactivation Procedure
Support on the S4-SGSN
The S4-SGSN supports
the following deactivation procedures:
-
3G / 2G MS
initiated bundle deactivation
-
3G / 2G MS
initiated dedicated bearer deactivation
-
3G / 2G P-GW
initiated dedicated bearer deactivation
-
3G / 2G P-GW
initiated PDN deactivation
DNS Support on the
S4-SGSN
By default, the S4-SGSN
supports the initiation of a DNS query after APN selection using
a S-NAPTR query. The S4-SGSN resolves a P-GW by sending an APN-FQDN
query to the DNS client. Similarly, the S4-SGSN resolves the S-GW
by sending a RAI-FQDN query to the DNS client. The DNS Client then
sends a query to the DNS server to retrieve NAPTR/SRV/A
records and return the S-GW or P-GW IP address to the SGSN.
To perform a DNS SNAPTR
query, the SGSN requires an additional, optional, configuration that
identifies the context where DNS lookup for EPC-capable UEs must
occur. This is accomplished by creating a call-control-profile that
specifies the context from which the DNS client should be used for
resolving a co-located P-GW/GGSN address on a Gn SGSN as well
New CLI commands have
been introduced to support this feature.
DSCP Marking of Control
Packets for Gb and Iu Interfaces
The SGSN now supports
a mechanism for differentiated services code point (DSCP) marking
of control packets and signaling messages at the SGSN’s
M3UA level on Iu interfaces and LLC messages for the Gb interface.
This DSCP marking feature
enables the SGSN to perform classifying and managing of network
traffic and to determine quality of service (QoS) for the interfaces
to an IP network. Implementation of this feature requires the use
of several existing, modified and new CLIs.
-
Use the
dscp-template command
in the SGSN Global configuration mode to create a new template or
to access an existing DSCP template.
-
Use the commands in the
DSCP Template configuration mode to define DSCP marking for data
packets and control packets.
-
Use modified and new commands
to associate the DSCP template at the
Forcing UE to a
Particular SGSN in Iu/Gb Flex Pool
3GPP TS 23.236 defines
pooling of SGSNs and the ability to offload subscribers from one SGSN
to another within the pool. This proprietary enhancements allows
an SGSN to offload on a per-subscriber basis (IMSI) and can force
the selected IMSI to offload to a specific SGSN (Target NRI). The
maximum number of IMSI that can be off-loaded at one time is 256.
Idle Mode Signaling
Reduction Support on the S4-SGSN
The S4-SGSN supports
the license-enabled idle mode signaling reduction (ISR) feature.
The ISR feature enables a UE to be registered in both UTRAN and
GERAN networks at the same time it is registered in the E-UTRAN
network. To activate the ISR feature, for a UE, ISR functionality must
be supported in both the UE and the SGSN, MME, S-GW and HSS.
New CLI commands are
introduced to enable and configure this feature.
Ignoring/Rejecting
Secondary PDP Request from UE
It is now possible
for the SGSN administrator to configure the operator policy’s
IMEI profile to either ignore or reject Secondary PDP Requests from
UEs based on an IMEI range.
Local Configuration
of P-GW Address on the S4-SGSN
The S4-SGSN provides
support for the local configuration of a P-GW to obtain its address for
operators wishing to bypass DNS resolution of APN FQDN for obtaining
a P-GW address.
A new CLI command has
been introduced to support this feature.
Local Configuration
of an S-GW Address per RAI on the S4-SGSN
The S4-SGSN supports
the option to configure a local S-GW address for a RAI (LAC, RAC, MCC
and MNC). The S4-SGSN will select this address based on the configured
local policy. The local policy can also be configured to allow the
selection of the locally configured S-GW address when the DNS lookup
fails. Local selection of the S-GW address applies in the following scenarios:
-
First PDP context activation
for a subscriber
-
Intra SGSN routing
area update
-
New SGSN routing area
update
-
New CLI commands have
been introduced to support this feature.
Location Change Reporting
3G/2G Location
Change Reporting on the SGSN facilitates location-based charging
on the GGSN by providing the UE’s location information
when the UE is in connected mode. The SGSN notifies the GGSN whenever
one of the following changes:
-
the serving cell global
identity (CGI), or
-
the service area identity
(SAI), or
-
the routing area identity (RAI).
Mobility Management
Procedure Support on the S4-SGSN
The S4-SGSN supports
the following mobility management procedures over the S6d (Diameter)
and Gr interfaces:
- Attach
- Service request
- Detach
- Iu-Release procedures
- Operator policy override
for the Gn/S4 interface for EPC subscribers
- Zone code
- ARD
- ADD
- Operator policy-based
Mobility Management context handling
MS Initiated Primary
Secondary Activation Procedure Support on the S4-SGSN
The S4-SGSN supports
default and dedicated bearer activation for:
-
Default and dedicated
activation secondary PDP procedure trigger from MS).
-
Lawful Intercept activation
rejects and failures
-
-
APN-selection as per
annex A.2/Spec 23.060 rel-9
Multi-Services Support
on CLC2
With Release 14.0,
the CLC2 is now able to support simultaneously multiple services through
the same optical port - such as Frame Relay and MTP2. The service
configuration is done at the path level and each path will correspond
to one of the possible services.
P-GW Initiated Bearer
Deactivation on the S4-SGSN
The S4-SGSN supports
the P-GW initiated PDP deactivation procedure in addition to the legacy
MS initiated deactivation procedure.
PSC3 Support
As Part of PSC3 support,
in Release 14.0 the SGSN now supports 8M attached subscribers and
16M PDP contexts. This enhanced support applies only to PSC3 with
14.0. For PSC2 with 14.0, the previous support numbers of 4M attached
subscribers and 8M PDP contexts still applies.
P-TMSI Scaling Support
for PSC3 Cards
Previous Behavior:
All P-TMSIs were allocated from a single pool.
New Behavior: Each
P-TMSI will be allocated from a specific NRI pool. To facilitate
this new default behavior, the no nri command
has been deprecated from both the GPRS Service and SGSN Service
configuration modes (refer to the sections for Deprecated SGSN Configuration
Commands for details.
In support of the new
default behavior for P-TMSI scaling for PSC3 cards, the nri command
structure in the GPRS Service and the SGSN Service configuration
modes has been modified, refer to the section for Modified SGSN Configuration
Commands for details.
New statistics have
been added to aid in monitoring NRI requirements, refer to the show sgsn sessmgr command
in the section on Modified SGSN
Performance Commands for details.
IMPORTANT:
To ensure backward
compatibility of the configuration file, pre-14.0 configuration
files will have the no
nri configuration treated as if NRI length 6 with NRI
value of 0 was configured.
QoS Mapping Support
on the S4-SGSN
The S4-SGSN supports
the configuration of quality of service (QoS) parameters as call-control-profiles
that will ensure proper QoS mapping between the S4-SGSN and the
EPC UEs.
The configured call-control-profiles
will be used if the S4 interface is chosen for PDP activation, but
the subscription does not have an EPS subscription. Therefore, GPRS
subscription data (which uses QoS in pre-release 8 format), will
be mapped to EPS QoS behavior. The Allocation and Retention policy
will be mapped to EPS ARP using the configured call-control-profiles.
New CLI commands have
been introduced to support this feature.
Restricting Activation
Based on PDP-Type
Administrative controls
for the SGSN have been enhanced so that PDP context activation can
be restricted based on the type of PDP requested. For an operator
policy’s call control profile, restrictions can be specified
for a single PDP-type or for multiple PDP-types and the restriction can
be further fine-tuned by network access type.
S13’ Interface
Support on the S4-SGSN
In addition to the
MAP-based Gf interface, the S4-SGSN supports the DIAMETER based S13’ (S13
prime) interface towards the Equipment Identify Registry. The S13’ interface
enables the S4-SGSN to perform the ME Identity Check procedure to
validate the IMEI with the EIR.
S13’ interface
support is a license-enabled feature.
New CLI commands have
been introduced to support this feature.
S3 Interface Support
on the S4-SGSN
A signaling interface
from the S4-SGSN to the MME in the EPC network is now supported over
the S3 interface. This interface provides a GTV2 signaling path
connection between the S4-SGSN and the MME for S4-SGSN-to-MME RAU / TAU
context handovers.
S4-SGSN Support
Support for S4-SGSN
functionality has been added to the SGSN to enable connectivity
of subscribers to the EPC core network when accessing through UMTS/GPRS.
The S4-SGSN is a license- enabled feature, and the license also
provides support for the S3 signaling interface to the MME.
The S4-SGSN supports
control and bearer separation, and off loads the backward compatibility
requirement from the MME and S-GW elements to the UMTS core.
Comprehensive S4-SGSN
support also includes support for these additional interfaces to
the following network elements and gateways:
-
S-GW via the S4 interface
(base feature of the S4 license)
-
Equipment Identity
Registry (EIR) via the S13’ interface (additional feature
license required)
-
Home Subscriber Server
(HSS) via the S6d interface (additional feature license required)
-
MME via the S3 interface
(base feature of the S4 license)
-
Peer S4-SGSN via the
S16 interface (base feature of the S4 license)
S6d Interface Support
for the S4-SGSN
The S4-SGSN supports
the DIAMETER-based S6d interface to the HSS, in addition to the legacy
Gr interface to the HLR (for the Gn/Gp SGSN). This license-enabled
feature enables operators to consolidate the HLR/HSS functions
into a single node. The SGSN selects the Gr interface / S6d
interface based on the MAP or HSS service associated with the configured
SGSN and/or GPRS services.
In addition, the S4-SGSN
sets the following initiate UGL messages on a change of HSS service:
-
Initial attach indicator
bit in Update GPRS Location message, ISR information IE, if the
UGL is sent for an initial attach or for a inbound routing area
update without ISR activation and the selected interface is Gr.
-
Initial attach indicator
bit in Update Location Request message, ULR flags, if the ULR is
sent for an initial attach or for a inbound routing area update
without ISR activation and the selected interface is S6d.
New CLI commands have
been introduced to support this feature.
S-GW and P-GW Tunnel
and Subscription Recovery on the S4-SGSN
The S4-SGSN supports
session recovery procedures and recovers the S4 tunnel created for each
subscriber assigned PDP contexts through S4 interface.
This functionality
is part of session recovery procedures and allows sessions to be reconstructed
when the system recovers from a card-level software fault.
Statistics Support
for the S4-SGSN
Bulk statistics support
has been implemented for the S4-SGSN. System and SGSN schemas have
been enhanced, and EGTPC schema bulk statistics support has been
introduced to provide information and statistics related to S4-SGSN functionality.
UE Requested Service
Request Procedure Support on the S4-SGSN
The S4-SGSN supports
the UE requested Service Request procedure as defined in section 6.12.1A
of TS 23.060 v8.10.0.
UMTS/GSM
AKA Support for the S4-SGSN
The S4-SGSN provides
support for the following UMTS/GSM Authentication and Key Agreement
(AKA) procedures:
-
-
-
PTMSI attach (foreign/local)
-
-
-
-
-
Using Peer SGSN/MME
vectors (ISRAU/PTMSI attach) in the same or different PLMN
Modified SGSN Features
This section
identifies SGSN features modified in release 14.0.
Backwards Compatibility
IMPORTANT:
Configuration files created
with Release 14.0 will not be downgradable.
With release of 14.0,
several commands have been deprecated and replaced by similar commands.
These changes were made to ensure the configurations would be compatible
with potential product combinations such as the SGSN/MME.
If your system is running
pre-14.0 software, we recommend that prior to upgrading to 14.0 you
copy the configuration file and store the copy off the chassis for
possible use if a downgrade is required.
Configuration files created
with releases prior to 14.0, that use the deprecated commands, will
automatically be converted using the new form of the commands required
for release 14.0.
The table below provides
a mapping between the deprecated (pre-14.0) commands, used for associating
various services with GPRS and SGSN services, and their release
14.0 equivalents.
Table 2. 14.0 Deprecated/Replacement Commands
Deprecated
Command |
New Equivalent
in Release 14.0 |
SGSN Service Configuration Mode
|
SGSN Service Configuration Mode
|
associate-service egtp <service_name> context <context_name>
|
associate egtp-service <service_name> context <context_name>
|
associate-service hss-peer-service <service_name> context <context_name>
|
associate hss-peer-service <service_name> context <context_name>
|
camel-service <service_name> context <context_name>
|
associate camel-service <service_name> context <context_name>
|
gs-service <service_name> context <context_name>
|
associate gs-service <service_name> context <context_name>
|
mobile-application-part service <service_name> context <context_name>
|
associate map-service <service_name> context <context_name>
|
sgtp-service <service_name> context <context_name>
|
associate sgtp-service <service_name> context <context_name>
|
. |
GPRS Service Configuration Mode
|
GPRS Service Configuration Mode
|
associate-dscp-template
downlink <template_name>
|
associate dscp-template
downlink <template_name>
|
associate-service camel <service_name> context <context_name>
|
associate camel-service <service_name> context <context_name>
|
associate-service egtp <service_name> context <context_name>
|
associate egtp-service <service_name> context <context_name>
|
associate-service gs <service_name> context <context_name>
|
associate gs-service <service_name> context <context_name>
|
associate-service hss-peer-service <service_name> context <context_name>
|
associate hss-peer-service <service_name> context <context_name>
|
associate-service map <service_name> context <context_name>
|
associate map-service <service_name> context <context_name>
|
associate-service sgtp <service_name> context <context_name>
|
associate sgtp-service <service_name> context <context_name>
|
Configurable Support
for Extended RNC ID
Corrected Content: This
section includes corrections to previously published content. The
previous content stated that the “Extended RNC ID expands
the ID range from 1 - 4096 to 1 - 65535” which is incorrect.
In accordance with
3GPP TS 29.060, v9.2.0, if the Target Identification IE preamble
byte is included as part of the gtpc send configuration
of the SGTP Service, then multiple optional parameters, such as
Extended RNC ID, are encoded. Extended RNC ID expands the ID range
from 0 - 4095 to 0 - 65535.
This is an expansion of
the supported functionality and no changes were made to the syntax. If
the gtpc send configuration
does not include the IE (the default), then the SGSN accords with
3GPP TS 29.060, v9.7.0 which discourages inclusion of the preamble
as this version of 29.060 specifies some of the optional parameters
(such as Extended RNC IDs) have become mandatory and some operational
parameters are removed.
Previous Behavior:
The SGSN did not support Extended RNC ID IE in RANAP messages. GTP
messages like Forward Relocation Requests and GTP Relay Information
Message did not support Extended RNC ID. Forward Relocation Request
was using the encoding and decoding scheme mention in 3GPP 29.060
(Release 9.1.0 or earlier).
New Behavior: The
SGSN now supports Extended RNC ID IE in RANAP messages. GTP messages
like Forward Relocation Requests and GTP Relay Information Message will
support Extended RNC ID. Forward Relocation Request uses the encoding
and decoding scheme mentioned in 3GPP 29.060 (Release 9.7.0 or after).
Default APN Enhancement
to Support Multiple Trigger APNs
It is now possible to
configure up to four (4) default APNs with the apn-selection-default command
in the APN Remap Table configuration mode. The default APN selection
procedure will proceed to check each configuration sequentially
(in the order of configuration) for all conditions and options unti
l one is a match.
This enhancement is
intended to reduce the number of activation rejections because of incorrectly
configured APNs and enable better operational efficiency. An example,
would be the ability for an operator to define separate default
APNs for prepaid and post-paid subscribers. Any one of the default
APN configurations can be deleted but they must be deleted one-at-a
time.
No changes were made
to the syntax to support this functionality.
Previous Behavior:
Previously, it was only possible to configure one default APN for
an operator policy.
New Behavior: Now
it is possible to use the same command syntax, apn-selection-default in
the Call Control Profile configuration mode, to configure up to
four instances of a default APN configuration per APN remap table
and operator policy.
GTP-C Echo Sent Immediately
Previous Behavior: The
SGSN sent GTP-C Echo Request 60 seconds after RAU Accept was received
in the following scenario:
- Precondition:
- iups1-sgtp-service1/map-service1/sgsnno1/plmn1
- iups2-sgtp-service2/map-service2/sgsnno2/plmn2
- gprs1-sgtp-service2/map-service2/sgsnno2/plmn1
- gprs2-sgtp-service1/map-service1/sgsnno1/plmn3
- Scenario:
- Attach in gprs1
- Activate
- GTPC/GTPU echo
retries
- Intra RAU in gprs2
- Path failure
- Complete RAU
New Behavior: When
a new GTPC session is added to the SGTPCmgr and the SGTPCmgr does
not have any information on that GGSN node, then the SGTPCmgr will
send an Echo Request immediately without waiting for 60 seconds
(even if SGTP service remote restart counter verification is disabled).
So in the above scenario, the modifications mean that the SGSN sends
Echo Request immediately after RAU Accept.
IMEI-SV Sending Behavior
Corrected Content: This
section includes corrections to previously published content. The
previous content stated that the “New Behavior: If CLI gtp send imeisv is
not enabled and the SGSN receives IMEI-SV from the MS during authentication,
then the SGSN IMEI-SV in the Create PDP Context Request to the GGSN.
So now by default, the SGSN sends IMEI-SV if it is received even
if gtp send imeiv is
not enabled.”-- This information was in error and has
been corrected below.
Previous Behavior: If
CLI gtp send imeisv was
not enabled and the SGSN received IMEI-SV from the MS during authentication,
then the SGSN sent the IMEI-SV, in the Create PDP Context Request,
to the GGSN. So by default, IMEI-SV was sent if received, even if gtp send imeiv was
not enabled.
New Behavior: If CLI gtp send imeisv is
not enabled and the SGSN receives IMEI-SV from the MS during authentication,
then the SGSN does not send IMEI-SV in the Create PDP Context Request
to the GGSN. So now by default, the SGSN sends IMEI-SV if it is
received only if gtp send imeiv is
enabled.
In/Outbound
Stream Control Enhanced
Previous Behavior: The
maximum configurable CLI limit for sctp-max-out-strms was
set to 65535 even though internally the number was capped at 16
as the maximum number of streams supported.
New Behavior: The
maximum configurable CLI limit for sctp-max-out-strms is
now 16, the default limit. To expand the operators control of streaming,
a configurable parameter to control inbound streaming - sctp-max-in-strms -
has been made accessible in the CLI.
Impact: For outbound
streaming with sctp-max-out-strms,
backward compatibility is maintained because even if the customer configured
a maximum greater than 16 in the CLI, the functional maximum was
capped. For inbound streaming, the customer can configure the maximum
number of streams, up to 16, to accommodate reception needs from
the peer - hence stream negotiation is improved and complete.
NRIs per SGSN
Beginning with Release
14.0, the number of subscribers per sessmgr has increased. For this reason,
it is strongly recommended that
at least 3 local NRIs be configured per SGSN to ensure smooth operation.
P-TMSI Allocation Strategy
Change
Previous Behavior: The
SGSN re-issued the same P-TMSI rather than relinquish a previously
allocated P-TMSI even if the MS had not started to use it.
New Behavior: The
SGSN relinquishes a P-TMSI if the MS is not using it and re-generates
another P-TMSI on the next Attach/RAU.
Impact: The SGSN
has a free run to generate any P-TMSI, so there should not be any
impact due to this change.
Session Manager Guard-Timer
Previous Behavior: The
internal SM guard-timer was hard-coded to 80s for 2G subscribers
and 35 seconds for 3G subscribers.
New Behavior: The
internal SM guard-timer is now configurable and the default for
both 3G and 2G timers is 80 seconds.
SGSN Configuration
Management Changes as of June 29, 2012
This section
provides information on SGSN configuration command changes in release 14.0.
IMPORTANT:
For more information
regarding commands in this section, refer to the GPRS/UMTS
Command Line Interface Reference for this release.
New SGSN Configuration
Commands
This section
identifies new SGSN commands available in release 14.0.
associate
Beginning with release
14.0, the associate CLI
command will be used to associate all services associated with GPRS
and SGSN services. The only exception is the IuPS service. This
is to provide a common framework for associating services across
the SGSN.
GPRS Service Configuration
Mode
associate { { camel-service < camel_svc_name
> | dscp-template
downlink <
dscp_template_name > | egtp-service < egtp_svc_name
> | gs-service< gs_svc_name
> | hss-peer-service < hss_svc_name
> | map-service < map_svc_name
> | network-global-mme-id-mgmt-db | sgtp-service < sgtp_svc_name
> } [ context < ctx_name
> ] | tai-mgmt-db < database_name
> }
no associate { camel-service | dscp-template downlink | egtp-service
| gs-service | hss-peer-service | map-service | network-global-mme-id-mgmt-db | sgtp-service | tai-mgmt-db < database_name
> }
SGSN Service Configuration
Mode
associate { { camel-service < camel_svc_name
> | egtp-service< egtp_svc_name
> | gs-service< gs_svc_name
> | hss-peer-service< hss_svc_name
> | map-service< map_svc_name
> | network-global-mme-id-mgmt-db | sgtp-service < sgtp_svc_name > } [ context < ctx_name
> ] | tai-mgmt-db < database_name > }
no associate { camel-service
| egtp-service | gs-service | hss-peer-service
| map-service | network-global-mme-id-mgmt-db | sgtp-service | tai-mgmt-db < database_name
> }
associate
New associate command
with a new keyword dscp-template
downlink in the IuPS service configuration mode associates
the DSCP template with the IuPS service and the Iu interface to
apply the configured DSCP values for all downlink subscriber-specific
control packets sent out from the SGSN.
IuPS Service Configuration
Mode
associate dscp-template
downlink <template_name>
no associate dscp-template downlink
associate
New associate command
with a new keyword dscp-template
downlink in the GPRS service configuration associates
the DSCP template with the GPRS service and the Gb interface to
apply the configured DSCP values for all downlink subscriber-specific
control packets sent out from the SGSN.
GPRS Service Configuration
Mode
associate dscp-template
downlink <template_name>
no associate dscp-template downlink
dns-pgw
Specifies the name
of the context where the S4-SGSN should perform a DNS lookup for
the P-GW.
Call Control Profile
Configuration Mode
dns-pgw context < context_name
>
remove dns-pgw
dns-sgw
Specifies the name
of the context where the S4-SGSN should perform a DNS lookup for
the S-GW.
Call Control Profile
Configuration Mode
dns-sgw context <context_name
>
remove dns-sgw
egtp-service
Creates a new, or enter
an existing, EGTP service on the S4-SGSN.
Context Configuration
Mode
egtp-service <service_name>
no egtp-service <service_name>
gmm T3323-timeout
Configures the Idle
Mode Signaling Reduction deactivation timer value sent to the UE
by the S4-GSSN during Attach Accept and RAU messages.
SGSN Service Configuration
Mode
gmm T3323-timeout <dur_mins>
default T3323-timeout
gtpc
Configures an EGTP
service on the S4-SGSN
EGTP Service Configuration
Mode
gtpc { bind { ipv4-address <ipv4_address> [ ipv6-address <ipv6_address> ] | ipv6-address <ipv6_address> [ ipv4-address <ipv4_address> ] } | echo-interval <seconds> { dynamic | smooth factor <multiplier> ] } | echo-retransmission-timeout <secs> | max-retransmissions <num> | path-failure detection | retransmission-timeout <seconds> }
no gtpc { bind { ipv4-address <ipv4_address> [ ipv6-address <ipv6_address> ] | ipv6- address <ipv6_address> [ ipv4-address <ipv4_address> ] } | echo-interval | path-failure
detection }
default gtpc { echo-interval | max-retransmissions | path-failure
detection | retransmission-timeout }
idle-mode-signaling-reduction
Configures the Idle
Mode Signaling Reduction (ISR) feature on the S4-SGSN. Only umts is currently
supported as an access-type.
Call Control Profile
Configuration Mode
idle-mode-signaling-reduction
access-type { umts | gprs }
remove idle-mode-signaling-reduction
access-type { gprs | umts }
interface-type
Specifies the interface
type for a pre-configured EGTP service.
EGTP Service Configuration
Mode
interface-type { interface-mme | interface-pgw-ingress | interface-sgsn | interface-sgw-egress
| interface-sgw-ingress }
location-reporting
Enables the SGSN to
perform location change reporting to the GGSN.
Call Control Profile
Configuration Mode
location-reporting access-type { gprs | umts }
remove location-reporting
access-type { gprs | umts }
pdn-type-override
Enables the SGSN to
override the IPv4v6 PDP/PDN type based on the access-type.
Call Control Profile
Configuration
pdn-type-override ipv4v6
( ipv4 | ipv6 ) [ access-type { eps | gprs | umts } ]
remove pdn-type-override
access-type { eps | gprs | umts }
pdp-activate
Enables the operator
to configure the SGSN to reject secondary PDP requests from the
UE based on the configured IMEI range.
IMEI Profile Configuration
Mode
pdp-activate { drop | restrict } secondary-activation
access-type { gprs | umts }
remove pdp-activate { drop | restrict } secondary-activation
access-type { gprs | umts }
peer-mme
Configures a peer MME
address for a given MME group ID (LAC) and MME code (RAC) on the
S4-SGSN.
Call Control Profile
Configuration Mode
peer-mme mme-groupid <lac_id> mme-code <rac_id> prefer { fallback-for-dns | local } address { <ipv4_address> | <ipv6_address> } interface { gn { s3 } | s3 { gn } }
remove peer-mme mme-groupid
<lac_id> mme-code <rac_id> prefer { fallback-for-dns | local } address { <ipv4_address>| <ipv6_address>} interface { gn { s3 } | s3 { gn } }
pgw-address
Configures a local
P-GW address on the S4-SGSN.
APN Profile Configuration
Mode
pgw-address <ip4_address> weight <value> [ -noconfirm ]
plmn
Creates a custom list
of MME group IDs on the S4-SGSN if networks have been configured with
LACs in the 32768-65535 range for UMTS and GPRS coverage.
LTE Network Global
MME ID Management Database Mode
plmn mcc <mcc_value> mnc <mnc_value>mme-group-id-range first <low_num>last <high_num>
no plmn mcc <mcc_value> mnc <mnc_value> mme-group-id-range
first <low_num> last <high_num>
prefer subscription-interface
Selects the specified
subscription interface (Gr or S6d) if both interfaces are associated
with call control profile.
Call Control Profile
Configuration Mode
prefer subscription-interface { hlr | hss }
remove prefer subscription-interface { hlr | hss }
qos
Enables the operator
to define QoS mapping parameters between the S4-SGSN and the S-GW.
Call Control Profile
Configuration Mode
qos gn-gp { arp
high-priority <
priority > medium-priority < priority > | pre-emption { capability { may-trigger-pre-emption | shall-not-trigger-pre-emption } | vulnerability { not-pre-emptable | pre-emptable } }
remove qos gn-gp arp
remove qos gn-gp pre-emption { capability | vulnerability }
rai
Configures local a
Routing Area Instance that will serve the S-GW addresses for an
S4-SGSN.
LTE TAI Management
Object Configuration Mode
rai mcc <mcc_value> mnc <mnc_value> lac <lac_value> rac <rac_value>
no rai mcc <mcc_value> mnc <mnc_value> lac <lac_value> rac <rac_value>
sctp-max-data-chunks
Enables the operator
to define a maximum limit for the number of Data chunks that can
be bundled into an SCTP message.
Peer Server Process
Configuration Mode
sctp-max-data-chunks ( limit <1..65535> | mtu-limit )
default sctp-max-data-chunks
sctp-max-in-strms
Enables the operator
to determine the maximum number of inbound streams to receive from the
peer.
PSP Configuration Mode
sctp-max-in-strms < max_in_strms
>
default sctp-max-in-strms
sctp-parameters
Enables the operator
to suppress repeat sending of the source IPv4 address as part of
the Optional Address Parameter IE i the INIT/INIT-Ack chunk
when the endpoint is uni-homed.
Peer Server Process
Configuration Mode
sctp-parameter ipv4-address
suppress single-ended
[ default | no
sctp-parameter ipv4-address suppress single-ended
service-type
A new service-type command
enables the operator to configure multi-service support for a single
port on a channelized line card (CLC2).
Card Configuration
Mode
service-type multi-service
default service-type
sgsn-core-nw-interface
On the S4-SGSN, enables
operators to forcefully select the Gn interface for EPC-capable UEs.
sgsn-core-nw-interface { gn | s4 }
sgw-address
Configure a local S-GW
address serving the configured RAIs in the TAI object on an S4-SGSN.
LTE TAI Object Configuration
Mode
sgw-address <ipv4_addr> | <ipv6_addr> s5-s8-protocol { both | gtp | pmip } weight <number>
no sgw-address <ipv4_addr> | <ipv6_addr> s5-s8-protocol { both | gtp | pmip }
tai-mgmt-db
Creates a TAI Management
Database for the S-GW for RAI configuration on the S4-SGSN. Once
created, the user enters TAI Management Database Configuration Mode.
LTE Policy Configuration
Mode
tai-mgmt-db <tai_mgmt_db_name> [ -noconfirm ]
no tai-mgmt-db <tai_mgmt_db_name> [ -noconfirm ]
tai-mgmt-obj
Creates a TAI management
object and enters TAI Management Object Configuration Mode for configuring
S-GW addresses per RAI on the S4-SGSN.
LTE Management Database
Configuration Mode
tai-mgmt-ojb <obj_name> [ -noconfirm ]
no tai-mgmt-obj <obj_name>
validation-mode
Specifies the validation
method to be performed on messages received by the configured EGTP
service on the S4-SGSN.
EGTP Service Configuration
Mode
validation-mode { custom1 | standard }
default validation-mode
vplmn-address
Overrides the ‘vplmn-address-allowed’ flag
behavior during GGSN selection.
Call Control Profile
Configuration Mode
vplmn-address { allowed | not-allowed }
remove vplmn-address
Modified SGSN Configuration
Commands
This section
identifies SGSN commands modified in release 14.0.
associate
A new keyword dscp-template downlink associates
the DSCP template with a specific peer server process (PSP) instance
to allow the SGSN to apply the configured DSCP values for all downlink
control messages sent out of the SGSN over the SCTP association.
PSP Configuration Mode
associate dscp-template downlink < template_name
>
no associate dscp-template downlink
ciphering-algorithm-gprs
The maximum number
of ciphering algorithm priorities that can be configured has been reduced
from 8 to 4.
Call Control Profile
Configuration Mode
ciphering-algorithm-gprs
priority <
priority > < algorithm_type >
remove ciphering-algorithm-gprs
priority <
priority >
failure-handling
The functionality of
the continue option
for IMEI procedures can be configured in case of timeout and error
responses requests from HSS so that the requests will be re-tried
on a second peer (if configured) and the call is continued. Previously,
for IMEI procedures the continue option
had the same funtionality as the retry-and-terminate option.
HSS Peer Service Configuration
Mode
failure-handling { authentication-information-request | check-identity-request| notify-request | purge-ue-request | update-location-request } { diameter-result-code start_error_code [ to end_error_code ] | request-timeout } action { continue | retry-and-terminate | terminate }
nri
Modified to support
configuration of P-TMSI scaling for PSC3s. For the nri length command,
keywords are now optional rather than mandatory. The default nri command
is added to set the NRI length to 6 and the value to 0.
GPRS Service Configuration
Mode
nri length < length > [ nri-value < nri_value > | null-nri-value < null_nri > non-broadcast-lac < lac > rac <rac> nri-value < nri_value
> ]
default nri
path
The new service-type
keyword enables the operator to configure multiple service types
(e.g., Frame Relay and MTP2) for the same port on a Channelized
line card (CLC2).
Channelized Port Configuration
Mode
path path_id { ds1 connects | e1 connects } service-type service-type frame-mapping multiplexing
index# index# framing mode mapping-mode { bit-sync | byte-sync } [ timeslots slot# [ slot# ] | framerelay [ intf-type intf_type [ lmi_type lmi_type ] ] ]
no path path_id { ds1 | e1 } connects service-type service_type
pdp-activate restrict
New pdp-type keyword
enables the SGSN to restrict PDP activation on the basis of the
requested PDP-type and network access type.
Call Control Profile
Configuration Mode
pdp-activate restrict
pdp-type { all | dual-ipv4v6 | ipv4 | ipv6 | ppp } access-type { gprs | umts } [ all | location-areas-list
instance <
instance > }
remove pdp-activate restrict
pdp-type { all | dual-ipv4v6 | ipv4 | ipv6 | ppp } access-type { gprs | umts } [ all | location-areas-list
instance <
instance > }
peer-nsei
In the peer-nsei command,
a new set of keywords enables the operator to associate a DSCP marking
template at the peer-NSE level to allow the SGSN to apply the configured
DSCP values for all downlink packets sent out from the SGSN over
the Gb interface.
GPRS Service Configuration
Mode
peer-nsei <nse_id> associate dscp-template downlink < template_name
>
no peer-nsei <nse_id> associate dscp-template downlink
peer-nsei
For the peer-nsei command,
the name keyword
is added to enable the operator to assign a name to the BSC in the
configuration.
GPRS Service Configuration
Mode
peer-nsei <nse_id> [ name < peer_nsei_name
> ]
no peer-nsei < nsei_id > [ name ]
sctp-max-out-strms
The system has always
capped the maximum number of outbound SCTP streams at 16 and now
the configurable range (1 - 16) has been modified to accommodate
the cap.
PSP Configuration Mode
sctp-max-out-strms < max_in_strms
>
default sctp-max-out-strms
sgsn-address
New keyword interface has
been added to enable operators to specify the interface type (s16 or gn) used
for communication between the SGSN and the peer SGSN.
Call Control Profile
Configuration Mode
sgsn-address rac <rac value> lac <lac value> [ nri <val> ] prefer { local | fallback-for-dns} address
ipv4 <ipv4 addr> interface { gn | s16 }
sgsn offload
Keyword combinations
for imsi and target-nri have
been added to enable the operator to select a particular subscriber
for offloading and/or to select a particular SGSN as the
target for offloading.
Exec Mode
sgsn offload { gprs-service < service_name
> | sgsn-service < service_name
> } { activating [ imsi < imsi > | nri-value < nri_value > | stop [ imsi < imsi > | nri-value < nri_value
> ] ] | connecting [ nri-value < nri_value
> | stop [ imsi < imsi > | nri-value < nri_value > | target-nri < target_nri > ] | t3312-timeout < seconds > [ nri-value < nri_value > | target-nri < target_nri > ] | target-nri < target_nri > [ imsi < imsi > | target-count < num_to_offload > ] ] }
sm
The new guard-timer keyword
enables the operator to set the expiry timer for the internal timer
that controls when the session manager resources are cleared for
both 3G and 2G SGSNs:
GPRS Service Configuration
Mode and SGSN Service
Configuration Mode
sm guard-timer< guard_seconds>
default sm guard-timer
Deprecated SGSN
Configuration Commands
This section
identifies SGSN commands that are no longer supported in release 14.0.
associate-service
The associate-service command
has been deprecated and the function has been added to the associate command.
SGSN Service Configuration
Mode
associate-service { egtp <service_name> | hss-peer-service <service_name> context <context_name> }
associate-service
The associate-service command
has been deprecated and the function has been added to the associate command.
GPRS Service Configuration
Mode
associate-service { egtp <service_name> | camel-service <service_name> | gs-service <service_name> | hss-peer-service <service_name> | map-service <service_name> | sgtp-service <service_name> context <context_name> }
camel-service
The camel-service command
has been deprecated and the function has been added to the associate command.
SGSN Service Configuration
Mode
camel-service <service_name> context <context_name>
gs-service
The gs-service command
has been deprecated and the function has been added to the associate command.
SGSN Service Configuration
Mode
gs-service <service_name> context <context_name>
mobile-application-part
service
The mobile-application-part-service command
has been deprecated and the function has been added to the associate command.
SGSN Service Configuration
Mode
mobile-application-part service<service_name> context <context_name>
no nri
The no nri option
has been deprecated from the nri command.
GPRS Service Configuration
Mode
no nri
sgtp-service
The sgtp-service command
has been deprecated and the function has been added to the associate command.
SGSN Service Configuration
Mode
sgtp-service<service_name> context <context_name>
SGSN Performance
Management Changes as of June 29, 2012
This section
provides information on SGSN performance management changes in release 14.0.
IMPORTANT:
For more information
regarding bulk statistics in this section, refer to the Statistics and Counters
Reference for this release.
For more information
regarding commands in this section, refer to the Command Line Interface Reference for
this release.
New SGSN Bulk Statistics
This section
identifies new SGSN bulk statistics available in release 14.0.
Modified SGSN Bulk
Statistics
This section
identifies SGSN bulk statistics modified in release 14.0.
Deprecated SGSN
Bulk Statistics
This section
identifies deprecated SGSN bulk statistics that are no longer supported
in release 14.0.
New SGSN Performance
Commands
This section
identifies new SGSN performance commands available in release 14.0.
show s4-sgsn statistics
Provides statistics
related to the S4-SGSN, including S-GW Relocations, ISR Deactivations, and
S3 Interface Selection Statistics.
Exec Mode
show s4-sgsn statistics [ all | smgr-instance <instance_number> ]
clear s4-sgsn statistics [ all | smgr-instance <instance_number> ]
Modified SGSN Performance
Commands
This section
identifies SGSN performance commands modified in release 14.0.
clear subscribers
Use of the new imei keyword
enables the operator to disconnect one subscriber or a range of
subscribers based on the international mobile equipment identity
(IMEI or IMEI-SV) of the subscriber’s mobile equipment.
Exec Mode
clear subscribers imei <imei>
clear subscribers sgsn-service <service_name> imei <imei>
clear subscribers gprs-service <service_name> imei <imei>
clear subscribers
Use of the new pooled-only keyword
ensures offloading only the subscribers from pooled RNCs/NSEIs.
Exec Mode
clear subscribers { gprs-service < service_name
> | sgsn-service < service_name
> } nri { any | <nri_value> } pooled-only
show bssgp statistics
The output of this
command has been modified so that RIM messages dropped due to an invalid
LAC value in the destination address display only for the invalid
destination address.
Exec Mode
show bssgp statistics
show bssgp statistics
verbose
The output of this
command, using the verbose keyword,
has been enhanced due to the moving of detailed BSSGP statistics
for downlink packets dropped due to different causes to verbose
mode.
Exec Mode
show bssgp statistics verbose
show bulkstat variables
The output of this
command has been enhanced to include the two bulkstat variables
related to message errors for permanent and transient failures on
the SGSN.
Exec Mode
show bulkstat variables
show call-control-profile
The output of this
command, using the full and all keywords,
has been enhanced to provide information related to the preferred
subscription interface configured on the SGSN.
Exec Mode
show call-control-profile
full all
show call-control-profile
The output of this
command, using the full and name keywords,
has been modified to show the name of the TAI management database
associated with the specified call-control-profile on the S4-SGSN.
Exec Mode
show call-control-profile
full name <name>
show call-control-profile
The output of this
command, using the full and name keywords,
has been modified to show the GPRS, UMTS, and/or EPS PDN
Type Override configuration information. EPS information is applicable
to the S4-SGSN only.
Exec Mode
show call-control-profile
full name <name>
show configuration
The output of this
command has been modified to indicate if a DSCP template has been associated
with the ss7-routing-domain.
Exec Mode
show configuration
show configuration
This command output,
using the verbose keyword,
has been modified to show the interface type configured for the
peer SGSN.
Exec Mode
show configuration verbose
show egtp statistics
The output of this
command is enhanced to show message statistics for the Idle Mode Signaling
Reduction (ISR) feature on the S4-SGSN. The verbose option
provides additional ISR-related message information.
Exec Mode
show egtpc statistics [ verbose ]
show gmm-sm statistics
The output of this
command has been enhanced to provide counters related to the override
of the VPLMN Address-Allowed Flag on a per service basis.
Exec Mode
show gmm-sm statistics { gprs-service | sgsn-service }<service-name>
show gmm-sm statistics
The output of this
command, with the sm-only keyword,
has been enhanced to provide statistics related to the Override
PDP Type for Inbound Roamers.
Exec Mode
show gmm-sm statistics
sm-only
show gmm-sm statistics
The output of this
command, with the verbose keyword,
has been enhanced to provide information related to idle-mode-signaling
reduction activity and operator policy-based reject counters related
to EGTPC.
Exec Mode
show gmm-sm statistics verbose
show gmm-sm statistics
The output of this
command, with the sm-only and verbose keywords,
has been enhanced to provide information on how many secondary PDP
requests from a UEs have been restricted (ignored) or rejected.
Exec Mode
show gmm-sm statistics
sm-only verbose
show gmm-sm statistics
The output of this
command, with the verbose keyword,
has been enhanced to provide a new counter that increments by one
only when all instances of an APN Selection failed.
Exec Mode
show gmm-sm statistics verbose
show gmm-sm statistics
The output of this
command, with the verbose keyword,
has been modified to rename the Cancel Location Attempts Indicator
to cancel-loc-att-indicator.
This counter also has been re-aligned to appear inline with the counter
that precedes it.
Exec Mode
show gmm-sm statistics verbose
show gprsns statistics
The output of this
command, with the sns-msg-stats and verbose keywords,
has been enhanced to provide three new counters that provide information
on the type of cause for the transmission of the SNS status message.
Exec Mode
show gprsns statistics
sns-msg-stats verbose
show gprs-service
The output of this
command, with the name keyword,
has been modified to indicate whether a DSCP template has been associated
with the peer NSEI.
Exec Mode
show gprs-service name <service_name>
show gprs-service
The output of this
command, with name keyword,
has been modified to indicate if a Network Global MME ID Management
Database and TAI Management Database are associated with the specified
GPRS service on the S4-SGSN.
Exec Mode
show gprs-service name <service_name>
show gprs-service
name
The output of this
command, with the name keyword,
has been enhanced to provide the BSC name associated with the configuration.
Exec Mode
show gprs-service name <service_name>
show gprs-service
The output of this
command, with the all and nsei all keywords,
has been enhanced to show the NSEI information (MCC, MNC, LAC, RAC,
NSE status) in tabular form.
Exec Mode
show gprs-service all
nsei all
show gprs-service
The output of this
command, with the all and nsei id keywords,
has been enhanced to show the NSE information in tabular form.
Exec Mode
show gprs-service all
nsei id <nse-id>
show gprs-service
The output of this
command, with the name and nsei all keywords,
has been enhanced to show the NSE information in tabular form.
Exec Mode
show gprs-service name <service_name> nsei all
show gprs-service
The output of this
command, with the name and nsei id keywords,
has been enhanced to show the NSE information in tabular form.
Exec Mode
show gprs-service name <service_name> nsei id <nse-id>
show hss-peer-service
The output of this
command, with the all keyword,
has been modified so that the Request timeout field always reads n/a (not applicable),
as the Request timeout is not currently used.
Exec Mode
show hss-peer-service all
show imsa - Changes
to the Output
Corrected Content: Information
related to changes to the output of show imsa was
added to the SGSN section in error and it has been removed.
show iups service
name
The output of this
command, with the name keyword,
has been enhanced to indicate if a DSCP template has been defined
for the specified iups-service.
Exec Mode
show iups-service name <service-name>
show llc statistics
verbose
The output of this
command, with the verbose keyword, been
enhanced so that in the tlli unassigned state, the SGSN will not
process an XID with a SAP value not equal to 1.
Exec Mode
show llc statistics verbose
show lte-policy
Including the tai-mgmt-db name keyword
with the command generates an output enhanced to provide the parameters
for the configured TAI management database on the S4-SGSN.
Exec Mode
show lte-policy tai-mgmt-db name<db_name>
show sgsn
Including the sessmgr keyword
with the command generates a display that has been enhanced to provide
output related to P-TMSI scaling for PS3 cards.
Exec Mode
show sgsn sessmgr ptmsi
statistics { nri <nri_value> }
show sgsn-pool statistics
The output of this
command, with the sgsn-service, imsi-offloaded-to-peer and verbose keywords,
has been enhanced to show the current off-loading configuration,
and to show the off-load status for subscribers based on the IMSI.
Exec Mode
show sgsn-pool statistics
sgsn-service <service_name> imsi-offloaded-to-peer
verbose
show sgsn-service
The output of this
command, with all keyword,
has been enhanced to provide the configured GMM-T3323 Timeout value
for the Idle Mode Signaling Reduction feature on the S4-SGSN.
Exec Mode
show sgsn-service all
show sgsn sessmgr
New keywords ptmsi statistics and nri <nri_value> have
been added to provide information for how many P-TMSIs are presently
allocated and how many are still free to be freshly allocated.
Exec Mode
show sgsn sessmgr { all | instance <instance> } ptmsi statistics { nri <nri_value> }
show sgtpc statistics
The output of this
command, with the all keyword,
has been enhanced to display GTP MS Info Change Notification Request
and MS Info Change Notification Response message statistics.
Exec Mode
show sgtpc statistics all
show ss7-routing-domain
The output of this
command has been enhanced to provide counter information related
to RST and RSR messages when the keywords, illustrated below, are
included with the command.
Exec Mode
show ss7-routing-domain
all mtp3 statistics destination-point-code all
show ss7-routing-domain
The output of this
command has been modified to indicate whether or not a DSCP template has
been associated with the specified ss7-routing domain.
Exec Mode
show ss7-routing-domain <domain_num>
show subscribers
Use of the new pooled-only keyword
in combination with the nri keyword
instructs the SGSN to only display subscribers with a specific NRI
in pooled RNCs/NSEIs.
Exec Mode
show subscribers { gprs-service < service_name
> | sgsn-service < service_name
> } nri { any | <nri_value> } pooled-only
show subscribers
The output of this
command has been enhanced to provide information pertaining to subscriber
usage of S4-SGSN related interfaces when keywords, illustrated below,
are included with the command.
Exec Mode
show subscribers [ grps-only | sgsn-only ] summary
show subscribers
The output of the this
command, with the gprs-only and full keywords,
has been modified to change the status indication for QoS-related
parameters on the S4-SGSN from “TRUE” to “ENABLED” and
from “FALSE” to “DISABLED.”
Exec Mode
show subscribers gprs-only full
show subscribers
The output of this
command, with the gprs-only and full keywords,
has been modified to output the current PTMSI, PTMSI Ack flag, and
any previously allocated PTMSI (when the current PTMSI is not acknowledged).
Exec Mode
show subscribers gprs-only full
show subscribers
The output of the this
command, with the sgsn-only and full keywords,
has been modified to change the status indication for QoS-related
parameters on the S4-SGSN from “TRUE” to “ENABLED” and
from “FALSE” to “DISABLED.”
Exec Mode
show subscribers sgsn-only full
show subscribers
The output of this
command, with the sgsn-only and full keywords,
has been modified to output the current PTMSI, PTMSI Ack flag, and
any previously allocated PTMSI (when the current PTMSI is not acknowledged).
Exec Mode
show subscribers sgsn-only full
show subscribers
The output of this
command, when including the sgsn-only,
full,
and all keywords,
has been enhanced to provide information related to S4-SGSN functionality.
Exec Mode
show subscribers sgsn-only
full all
show subscribers
The output of this
command, when including the summary keyword,
has been enhanced to provide information relating to subscribers’ use
of interfaces.
Exec Mode
show subscribers summary
Deprecated SGSN
Performance Commands
This section
identifies deprecated SGSN performance commands that are no longer
supported in release 14.0.
SGSN Security Management
Changes as of June 29, 2012
This section provides
information on SGSN security management changes in release 14.0.