SGSN Global Configuration Mode Commands

The commands in this mode configure SGSN-specific parameters impact the entire SGSN and that are independent of the GPRS or the IuPS services.

In this mode, your prompt will look similar to:
[local]hostname(config-sgsn-global)#

The SGSN Global configuration mode is a sub-mode derived from the Global configuration mode.

IMPORTANT:

The commands or keywords/variables that are available are dependent on platform type, product version, and installed license(s).

aggregate-ipc-msg

Enables/disables aggregation of inter-process communication (IPC) messages in the link manager (linkmgr) and session manager (sessmgr).

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
aggregate-ipc-msg { linkmgr | sessmgr } { flush-frequency frequency | num-msgs number_msgs }  default aggregate-ipc-msg { linkmgr | sessmgr }
default

Resets the managers to default values for flushing.

linkmgr

Selects the linkmgr to configure the number of IPC messages to be aggregated and frequency of flushing.

sessmgr

Selects the sessmgr to configure the number of IPC messages to be aggregated and frequency of flushing.

flush-frequency frequency

Configure the frequency, in 100-millisecond intervals, that the aggregated IPC messages will be flushed.

frequency : Enter an integer from 1 to 3. Default is 1.

num-msgs number_msgs

Configure the number of IPC messages to aggregate before flushing.

number_msgs : Enter the integer 1 (to disable aggregation) or an integer from 2 to 164 to define the number of messages. Default is 10.


Usage:

Use this command to enable/disable aggregation of IPC messages in the linkmgr and/or the sessmgr. This command includes options to configure the frequency of aggregated message flushing and the number of packets to be buffered before the flush. This command provides a solution for reducing latency while sending the IPC messages towards the core network (CN).

By default, the link manager buffers packets and then send them over the SCCP link if there are events to be sent via SCCP Connection Request (SCCP CR) towards the core node. The SGSN aggregate packets for 100 msec and send them with whatever aggregation has been done during those 100 msecs.

At the SGSN, this command can be used to reduce the processing involved in sending every event individually towards the core node in the following manner:
  • If aggregation is enabled, then there could be a time delay for sending SCCP CRs depending on configuration of the HNB-GW or SGSN.
  • If aggregation is reduced to 1, then there will be no delay for aggregation and events are sent via SCCP CR without delay. This reduces the SCCP connection setup time.

To view aggregate IPC message statistics, use command show config | grep aggregate-ipc-msg.


Example:
Configure the linkmgr to buffer 45 messages before flushing the linkmgr IPC messages: 
aggregate-ipc-msg
linkmgr flush-frequency 45
The following command configures the linkmgr to flush the IPC messages towards the CN without aggregation: 
aggregate-ipc-msg linkmgr1
The following command configures the sessmgr to flush the IPC messages towards the CN without aggregation: 
aggregate-ipc-msg sessmgr1
apn-resolve-dns-query snaptr

Enable/disable sending of SNAPTR DNS query to resolve an APN for a subscriber with an EPS (evolved packet system)-capable handset.

IMPORTANT:

This command is no longer available in all 12.0 and 12.2 releases. If you do not see this command in your release, look for the apn-resolve-dns-query snaptr command in the APN Profile configuration mode to accomplish the same task.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
[ no ] apn-resolve-dns-query snaptrdefault apn-resolve-dns-query
default

Resets the default, the ability to send SNAPTR DNS query is disabled.

no

Disables the ability to send SNAPTR DNS query.


Usage:

By default, sending the SNAPTR DNS query is disabled. Use this command to send SNAPTR DNS query when resolving an APN for an EPS-capable subscriber.

At PDP context activation, the SGSN will use the UE capabilitly as input to select either a GGSN or a P-GW for the EPS-capable subscriber. The SNAPTR DNS query will be used for P-GW resolution. Enabling this feature will give priority to P-GW selection for E-UTRAN-capable UEs.


Example:
Use the following command to enable sending of SNAPTR DNS query for APN resolution: 
apn-resolve-dns-query
Use the following command to disable the use of SNAPTR DNS query for APN resolution:
no apn-resolve-dns-query
bssgp-message ms-flow-control-from-unknown-ms

This command determines the SGSN response to MS-Flow-Control messages received from an unknown MS.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
bssgp-message ms-flow-control-from-unknown-ms { discard-message | send-ack | send-status }default bssgp-message
ms-flow-control-from-unknown-ms
default

Including default with the command configures the SGSN to use default behavior so that the SGSN sends BSSGP-Status messages whenever the SGSN receives an MS-Flow-Control message from an unknown MS.

discard-message

This keyword instructs the SGSN to discard the received BSSGP message. With this option, the SGSN does not send any response to the MS after discarding the received BSSGP message.

send-ack

This keyword instructs the SGSN to send an acknowledgement message (MS-Flow-Control-ACK) after receiving an MS-Flow-Control message.

send-status

Default

This keyword instructs the SGSN to send a BSSGP-Status message to the MS whenever the SGSN receives an MS-Flow-Control message from an unknown MS.


Usage:

This command allows the operator to specify the action the SGSN needs to take whenever the SGSN receives an MS-Flow-Control message from an unknown mobile station. This configuration determines the response for the SGSN globally.

The list of possible actions are:
  • send a BSSGP-Status response message
  • send an ACK message (MS-Flow-Control-ACK)
  • discard the BSSGP message

To see the statistics for the number of MS-Flow-Control messages that have been discarded, use the show bssgp statistics command from the Exec mode.

Example

Example
Change the default configuration and have the SGSN acknowledge receipt of the MS-Flow-Control message:
 bssgp-message ms-flow-control-from-unknown-ms send-ack
bssgp-timer

Configures the T2 and TH timers for the BVCs (BSSGP virtual connections) of the NSE (network service entities).

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
bssgp-timer { t2 T2_time | th TH_time }default bssgp-timer { t2 | th }
default

Resets the specified timers to default settings.

t2 T2_time

Configures the BVC reset guard timer (at the BSSGP layer) in units of 1 second.

T2_time : Enter an integer from 1 to 120. Default is 30 seconds.

th TH_time

Configures, at the BSSGP layer, the MS flow control parameter validity timeouts in units of 1 second.

TH_time : Enter an integer from 6 to 5999. Default is 500 seconds.


Usage:

Use this command to configure timer timeout values for MS flow control and BVC reset timers that control BVCs for the NSEs.


Example:
Set the TH timeout for 20 seconds: 
bssgp-timer th 20
bvc-unblock

This command enables (disabled by default) or disables the SGSN to unblock blocked BVCs based on the receipt of uplink packets from the BSC.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
bvc-unblock { data-or-flow-control | flow-control | ul-data }[ default | no ] bvc-unblock
default

Include default with the command to disable the function.

no

Include no with the command to disable this function.

data-or-flow-control

Enables the BVC-Unblock function when the SGSN receives either a FLOW-CONTROL-BVC packet or a UL-UNITDATA packet.

flow-control

Enables the BVC-Unblock function when the SGSN receives a FLOW-CONTROL-BVC packet.

ul-data

Enables the BVC-Unblock function when the SGSN receives a UL-UNITDATA packet.


Usage:

Configurations defined with this command are common to all NSE defined for the SGSN.

This command is useful if there is a BVC status mismatch across different SGSN managers (such as the sessmgr and the linkmgr) when the BSC sends BVC-Block (SGSN should move to BLOCKED) followed by a BVC-Reset (SGSN should move to UNBLOCKED). Such mismatches can easily occur, particularly on Gb-IP network connection, when one link receives the BVC-Block and a different link receives the BVC-Reset with little delay between the two.

If BVC-Unblock function is enabled, the SGSN ensures that BVCs which are in the BLOCKED state move to the UNBLOCKED state upon receipt of the configured packet type(s).


Example:
Instruct the SGSN to perform BVC-Unblock when a mismatch occurs and the SGSN receives a FLOW-CONTROL-BVC packet: 
bvc-unblock flow-control
dscp-template

Creates and/or deletes DSCP templates that can be configured for use for all GPRS services on the SGSN and provides access to the DSCP Template configuration mode.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
dscp-template template_name [ -noconfirm ]no dscp-template template_name
no

Deletes the template instance from the SGSN Global configuration.

template_name

Enter 1 to 64 alphanumeric characters, including dots (.), dashes (-), and forward slashes (/). to identify a unique instance of a DSCP template.

There is no known limit to the number of templates that can be created.


Usage:

This command enables the operator to create or delete an instance of a DSCP template and access the DSCP Template configuration mode. The DSCP templates are used to define the DSCP configuration for control packets and data packets for the GPRS services.

Related commands:
  • This command provides access to the mode containing all the configuration commands used to define DSCP markings for the control packets and data packets for a particular GPRS service (see the DSCP Template Configuration Mode Commands section).
  • To associated a specific DSCP template with a specific GPRS service configuration, for builds prior to release 14.0 use the associate-dscp-template downlink command and for builds in releases 14.0 and higher use the associate dscp-template downlinkcommand. Both commands are documented in the GPRS Service Configuration Mode Commands section.
  • To check the list of DSCP templates configured, use the show sgsn-mode command documented in the Exec Mode Commands section.

Example:
Use a command similar to the following to create a DSCP template with ID dscp_london that can be used specifically for Gb/IP calls from subscribers in London: 
dscp-template dscp_london
end

Exits the current mode and returns to the Exec Mode.

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
end

Usage:

Change the mode back to the Exec Mode.

exit

Exits the current mode and returns to the previous configuration mode.

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
end

Usage:

Change the mode to the Global Configuration Mode.

gmm-message

This command configures the SGSN to discard (drop) the Attach-Request message received with a random TLLI already in use.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
[ default ] gmm-message
attach-with-tlli-in-use discard-message
default

Resets the default function allowing multiple MS, using the same random TLLI, to attempt to Attach simultaneously and disables discarding the Attach-Request message for random TLLI already in use.


Usage:

Working with the two related commands (noted below), this command is part of a procedure for handling multiple MS Attaches all with the Same Random TLLI. Use this command to configure the SGSN to allow only one subscriber at a time to attach using a fixed random TLLI.

Related Commands:
  • The old-tlli invalidate tlli command configures a list of random TLLI to be invalidated from the GMM after the invalidate old-TLLI timer expires.
  • The old-tlli hold-time command configures the old-TLLI expiry timer.

Example

Example
Configure the SGSN to drop Attach Request containing TLLI already in use:
 gmm-message attach-with-tlli-in-use
discard-message
gmm-sm-statistics

This command is used to configure display of counters for internal/external reasons which lead to 2G/3G and Combined Attach Reject scenarios.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
 gmm-sm-statistics
attach-rejects cause network-failure only-internal 

 no gmm-sm-statistics
attach-rejects
no

The no form of the command is used to configure the display of counters for both internal and external triggers/reasons which lead to 2G/3G and Combined Attach Reject scenarios. This is also the default behavior.


Usage:

Different internal or external triggers/reasons lead to 2G/3G and Combined Attach Reject scenarios. 2G/3G and Combined Attach Requests are rejected with network failure cause codes.The operator is provided the flexibility to configure the display of internal or external reasons which lead to reject scenarios.

Example

Example
The following command is used to configure display of counters for internal reasons which lead to 2G/3G and Combined Attach Reject scenarios:
 gmm-sm-statistics
attach-rejects cause network-failure only-internal
The following command is used to configure display of counters for both internal and external reasons which lead to 2G/3G and Combined Attach Reject scenarios:
 no gmm-sm-statistics
attach-rejects
interface-management

This command creates an interface management configuration and provides access to the SGSN global interface management configuration mode.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
interface-management

Usage:

Use this command to access the SGSN global interface management configuration command to map NSE-ID and NSE-name to the Gb interface and/or to lock and unlock NSE/BSC from the SGSN.

Example

Example
Access the SGSN global interface management configuration command mode:
interface-management
imsi-range

Configure an IMSI range or a PLMN ID to associate with an Operator Policy.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
imsi-range mcc mcc_num mnc mnc_num { msin first start_number last stop_number [ operator-policy policy_name [ description description ] ] | plmnid plmn_id operator-policy policy_name [ description description ] } +no imsi-range mcc mcc_num mnc mnc_num { msin first start_number last stop_number | plmnid plmn_id }
no

Using no in the command deletes the definition from the SGSN Global configuration.

mcc mcc_num

mcc defines the mobile country code (MCC) of an IMSI.

mcc_num: Enter a 3-digit number from 100 to 999 - 000 to 099 are reserved.

mnc mnc_num

mnc defines the mobile network code (MNC) of an IMSI.

mnc_num: Enter a 2 or 3-digit number from 00 to 999.

msin

MSIN (mobile subscriber international number) portion of the IMSI.

first start_num: Defines first MSIN prefix number in a range

last stop_num: Defines the last or final MSIN prefix number in a range.

operator-policy policy_name description description

Identify the operator policy that the IMSI range definition and/or the PLMN-ID is to be associated.

policy_name : Enter a string of 1 to 64 alphanumeric characters.

description: Enter a string of 1 to 100 alphanumeric characters to provide range clarification for converted Release 9.0 configurations.

If a PLMN-ID is to be included in the definition, enter the plmnid before entering the operator policy name.

plmnid plmn_id

The 5-6 digit PLMN-ID consists of the MCC (mobile country code) plus the MNC (mobile network code) to identify the public land mobile network (PLMN) for a specific operator. This keyword associates a specific PLMN with this specific SGSN operator policy.

plmn_id : Enter 5 to 6 digits.

+

This symbol indicates that command can be repeated to create repeated definitions.


Usage:

An IMSI = maximum of 15 digits. An IMSI consists of the MCC (3 digits) + the MNC (2 or 3 digits) + the MSIN (the remaining 10 or 9 digits depending on the length of the MNC ).

MCC and MNC are the minimum amount of information required to identify a unique operator policy with IMSI filtering. The MCC and MNC combine uniquely to identify the country and the network operator, for example: Cingular Wireless in the United States = mcc 311mnc 180

To improve the granularity of call handling, an operator policy with additional IMSI filtering parameters can be defined, to include filtering based on the MSIN, by defining a MSIN range - first (or start-of-range) MSIN and last (or end-of-range) MSIN. The range numbers do not include the maximum allowed for the MSIN but should include a sufficient number to enable the operator policy to filter effectively.

For the most efficient IMSI filter, the operator policy should include all of the above parameters and the PLMN ID which defines the current location of the MS -- this parameter is particularly useful for highlighting which calls are roaming.

And if none of the operator policies contain useful filtering information, then the default operator policy will be applied as the information in this command is never defined for the default operator policy.

The following table will illustrate how these filtering parameters determine which operator policy will govern a call:

Operator Policy ID MCC MNC MSINfirst MSINlast PLMN ID
OpPol-1 123 45 67890 67898 .
OpPol-2 123 45 . . .
OpPol-3 123 45 67890 67898 23232
OpPol-4 123 45 . . 23232
OpPol-5 123 45 6789012 6789019 .
OpPol-6 123 45 6789012 6789019 23232
default . . . . .


The filtering selects which operator policy will be used to determine how a call is handled - the operator policy that best matches the IMSI. So, a call with IMSI 123456789012345 PLMNID 23232 is best matched with OpPol-6.

In most cases, the operator policy with the most information defined will be used as a combination of PLMNID and IMSI provides the best match. But OpPol-6 won’t always be the best match. Using the table above:

OpPol-1 is the best match for IMSI 123456789011111

OpPol-2 is the best match for IMSI 123456789099999

OpPol-5 is the best match for IMSI 123456789012345 if the PLMNID is 12344


Example:
The following associates operator policy oppol1 with country code 310, mobile network code of 33, and IMSI range 1231234 - 1231244:
imsi-range mcc 310
mnc 33 msin first 1231234 last 1231244 operator-policy oppol1
location-services

Enable or ‘start’ Location Services (LCS) on the SGSN.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
location-servicesno location-services
no

Disables or ‘stops’ LCS on the SGSN.


Usage:

By default, Location Services is not enabled on the SGSN. This command is mandatory to enable the SGSN to support LCS, which is a license-controlled feature. Multiple other commands are required to configure LCS functionality. For more information about the operation and configuration of LCS on the SGSN, refer to the Location Services section of the SGSN Administration Guide.


Example:
Use the following command to disable Location Services once they have been enabled:
no location-services
map-message

This command instructs the SGSN to ignore the CAMEL subscription when there is no CAMEL service associated or in existence.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
map-message insert-subscriber-data
csi-handling when-camel-not-associated ignore-subscriptiondefault map-message
insert-subscriber-data csi-handling
default

Resets the SGSN’s default behavior. By default, the SGSN validates the CAMEL subscription and rejects an Attach Request when there is no CAMEL service association.


Usage:

By default, the SGSN updates the the CAMEL subscription included in the INSERT-SUBSCRIBER-DATA (ISD) messages received from the HLR. While processing the ATTACH request from the CAMEL subscriber, the SGSN checks whether it has a CAMEL service associated with the corresponding service (either GPRS service or SGN service). It drops the ATTACH request if there is no CAMEL service associated with a corresponding service.

Also by default, the SGSN does not allow establishment of a Direct Tunnel (DT) for a CAMEL subscriber. It strictly validates the subscriber against the CAMEL subscription during the Direct Tunnel setup procedure.

This command enables the operator to control the behavior of the SGSN by configuring the SGSN to ignore the CAMEL subscription. This allows the SGSN to successfully complete an ATTACH procedure when there is an ATTACH Request from a CAMEL subscriber and there is no CAMEL service association in the SGSN. As well, during the Direct Tunnel establishment, validation of the CAMEL subscription is ignored to allow the DT to setup when there is no CAMEL service association in the SGSN.


Example:
Instruct the SGSN to validate the CAMEL subscription:
default map-message
insert-subscriber-data csi-handling
max-pending-attaches

Configure the maximum length of the pending attach queue.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
max-pending-attaches limitdefault max-pending-attaches
default

Resets the SGSN’s Attach queue to a maximum pending value of 10,000.

limit

Set the a maximum limit to the pending Attach/RAU messages queue in the LinkMgr. When the limit is reached a message is sent to the IMSIMgr.

limit : Enter an integer from 5000 - 50000. Default is 10000.


Usage:

With this command, configure the maximum limit to the pending ATTACH/RAU messages queue in the LinkMgr. When the limit is reached, the LinkMgr sends the Query/Forward messages to the IMSIMgr.

As the IMSIMgr gets busier and does not responded to Query/Forward requests, the response to the requests will get slower and slower and the queue size continues inflating if the incoming message rate is high. To avoid this situation, set the max-pending-attaches for the pending queue for Attach and RAU messages. All other messages from the HLR will be added to the queue as they cannot be dropped. High and low watermarks are set to the queue at 80% of max-pending-attaches ” and 60% of max-pending-attaches respectively.

Once a high watermark is reached, the new Attach and RAU requests are dropped and relevant statistics are incremented. Once a low watermark is hit, the new Attach/RAU requests are accepted and added to the pending queue. The entries are added to the pending queue only when the window-size between IMSIMgr and LinkMgr becomes zero. This is a very rare occurrence and will not affect the current behavior in normal circumstances.


Example:
Set the queue length to a maximum of 15000 requests:
max-pending-attaches 15000
old-tlli invalidate tlli

This command configures a list of random TLLI to be invalidated (removed) from the GMM after the invalidate old-TLLI timer expires.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
[ no ] old-tlli
invalidate tlli < hexadecimal >
no

Removes a single random TLLI from the configured list.

< hexadecimal >

Identifies a single random TLLI to be removed from the GMM after the old-TLLI timer expires.


Usage:

Use this command to create a list of up to 50 random TLLI to be dropped from the GMM after the old-TLLI timer expires. This command also starts the invalidate old-TLLI timer.

IMPORTANT:

If the old-TLLI expiry timer is not configured with the old-tlli hold-time command, then the SGSN will only drop second Attach Requests using the same random TLLI already in use.

Related Commands:
  • The gmm-message configures the SGSN to discard (drop) the Attach-Request message received with a random TLLI already in use
  • The old-tlli hold-time command configures the old-TLLI expiry timer.

Example

Example
Add random TLLI 0x7f05a30a to the Invalidate List: 
 old-tlli invalidate
tlli 0x7f05a30a
old-tlli hold-time

This command configures the old-TLLI expiry timer to be started in GMM when anyone of the listed random TLLI are received.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
[ default ] old-tlli
hold-time <
seconds >
default

Resets the timer to 5 seconds

< seconds >

Sets the numbers of seconds before the timer expires; range 1 to 125.


Usage:

Use this command to configure the old-TLLI expiry timer to be started in GMM when anyone of the listed random TLLI are received. If the timer expires prior to receiving Attach-Complete then the SGSN invalidates (removes) the TLLI from the GMM.

IMPORTANT:

For this configuration to work, the list of random TLLI to be removed (invalidated) from the GMM must be defined with the old-tlli invalidate tlli command.

Related Commands:
  • The gmm-message configures the SGSN to discard (drop) the Attach-Request message received with a random TLLI already in use
  • The old-tlli invalidate tlli command configures the random invalidate TLLI list.

Example

Example
Set the timer for 2 seconds: 
 old-tlli hold-time 2
pdp-deactivation-rate

Set the rate the SGSN deactivates PDP connections per second per SessMgr when GPT-C path failure is detected.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
pdp-deactivation-rate { connected-ready rate | idle-standby rate } default pdp-deactivation-rate { connected-ready | idle-standby }
default

If this keyword is used with the command, then the default deactivation rates are used.

connected-ready rate

Subscribers that are in the PMM-Connected / GPRS-Ready state and actively using the SGSN service need to be deactivated at a faster rate to facilitate the deactivation/re-activation process.

rate -sets the number of subscribers to be deactivated per second per SessMgr and the valid range is 1 to 1000 and the default is 760 connected-ready subscribers deactivated per second.

idle-standby rate

Subscribers that are in the PMM-Idle / GPRS-Standby state are not actively using the SGSN service and can be deactivated at a slower rate. The deactivation process for idle-standby subscribers includes paging before the Deactivate Request is sent.

rate - sets the number of subscribers to be deactivated per second per SessMgr and the valid range is 1 to 1000 and the default is 240 idle-standby subscribers deactivated per second.


Usage:

Use this command to define a rate at which the SGSN processes PDP deactivations when a GTP-C path failure is detected (and confirmed according to the SGSN's default behavior). The operator can use this command to set a deactivation rate that ensures radio network congestion is avoided.

Related commands:
  • max-remote-restart-counter-change - allows the operator to set a maximum variance between stored and received values for restart counter changes coming from the GGSN. For details, refer to the SGSN Global configuration mode documentation.
  • disable-remote-restart-counter-verification - allows the operator to disable the default behavior. For details, refer to this command in the SGSN Global configuration mode documentation.

Example

Example
Use the following command to deactivate PDP connections for 600 PMM-Connected / GPRS-Ready subscribers per second:
pdp-deactivation-rate
connected-ready 600
Use the following command to deactivate PDP connections for 320 PMM-Idle / GPRS-Standby subscribers per second:
pdp-deactivation-rate
idle-standby 320
Use the following command to reset the default 760 per second deactivation rate for PMM-Connected / GPRS-Ready subscribers: 
default pdp-deactivation-rate
connected-ready
target-offloading

Selects the subscriber offloading algorithm to be applied to the SessMgr and the IMSIMgr.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
target-offloading
algorithm [ optimized-for-speed | optimized-for-target-count ] default target-offloading
algorithm
default

Resets the configuration to default values.

optimized-for-speed

Enables faster algorithm to achieve the target count.

optimized-for-target-count

Enables a reliable algorithm to achieve the target count.

Default.


Usage:

With the SGSN’s distributed architecture, there are many SessMgrs and offloading will happen in parallel at all SessMgrs. This command enables the operator to control the total number of subscribers being offloaded.

IMPORTANT:

The value for this command can not be altered once dynamic offloading has begun - refer to the command description for the sgsn-offload command in the Exec Mode chapter..


Example:
Set the SGSN to use the faster algorithm for offloading:
target-offloading
algorithm optimized-for-speed
tlli-cb-audit

This command enable (default is disabled) or disables a periodic (hourly) audit of TLLI-CBs in the BSSGP� layer.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
tlli-cb-audit[ default | no ] tlli-cb-audit
default

Include default with the command to disable the audit function.

no

Include no with the command to disable the audit function.


Usage:

This command is used to clean-up hanging or unassociated TLLI in the BSSGP layer. This configuration defined with this command will be common to all NSE configured for this SGSN.

Independent of this command configuration, the SGSN triggers and audit when the number of TLLI-CBs reaches 35,000.


Example:
Use the following command to enable the hourly audit for unassociated TLLl-CBs:
tlli-cb-audit
umts-aka-r99

This command enables the operator to authenticate mobile equipment (MEs) with R99+ USIMs and capable of UMTS AKA.

Platform:

ASR 5000

Product:

SGSN


Privilege:

Security Administrator, Administrator


Syntax 
umts-aka-r99no umts-aka-r99
no

Including no with the command disables the authentication.


Usage:

This command enables operators to authenticate MEs that are attempting to connect to a 2.5G network with R99+ USIMs if the MEs are UMTS AKA capable. For R99 mobiles, the SGSN will continue to perform GSM AKA even if quintuplets are received fromthe HLR.

Example

Example
Use the following command to disable UMTS AKA authentication for MEs with R99+ USIMs:
no umts-aka-r99