# S-GW Changes in Release 14.0

This chapter identifies features and functionality added to, modified for, or deprecated from 14.0 S-GW software releases.
Topics covered in this chapter are:

- S-GW Feature Changes as of November 7, 2012
- S-GW Configuration Management Changes as of November 7, 2012
- S-GW Performance Management Changes as of November 7, 2012
- S-GW Security Management Changes as of November 7, 2012
- S-GW Feature Changes as of September 28, 2012
- S-GW Configuration Management Changes as of September 28, 2012
- S-GW Performance Management Changes as of September 28, 2012
- S-GW Security Management Changes as of September 28, 2012
- S-GW Feature Changes as of July 31, 2012
- S-GW Configuration Management Changes as of July 31, 2012
- S-GW Performance Management Changes as of July 31, 2012
- S-GW Security Management Changes as of July31, 2012
- S-GW Feature Changes as of June 29, 2012
- S-GW Configuration Management Changes as of June 29, 2012
- S-GW Performance Management Changes as of June 29, 2012
- S-GW 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.

S-GW Feature Changes as of November 7, 2012

This section provides information on S-GW feature changes in release 14.0.

IMPORTANT:

For more information regarding features in this section, refer to the S-GW Administration Guide for this release.

New S-GW Features

This section identifies new S-GW features available in release 14.0.

None for this release.

Modified S-GW Features

This section identifies S-GW features modified in release 14.0. There are two kinds of modified features: enhancements and behavior changes. Enhancements are feature changes based on customer change requests. Behavior changes are feature changes that modify an existing behavior and may result from software error corrections (bug fixes).

UE IDLE: HSS Triggered APN-AMBR Modify Failed Due to No DDN

When the UE was in IDLE state, S-GW received Modify Bearer Request (MBR); however, when it needed to do Downlink-Data-Notification (DDN) to originate Update Bearer Request (UBR), the S-GW failed to send DDN to MME.

Previous Behavior: On receiving UBR from P-GW, if page-ue pgw-initiated-proc CLI command is configured and UE is in idle state, S-GW tries to initiate DDN towards MME.

New Behavior: Now, if UBR is triggered due to MBR from MME, even if page-ue pgw-initiated-proc CLI command is configured and UE is in idle state, S-GW will will forward UBR to MME instead of initiating DDN.

S-GW Configuration Management Changes as of November 7, 2012

This section provides information on S-GW configuration command changes in release 14.0.

None for this release.

S-GW Performance Management Changes as of November 7, 2012

This section provides information on S-GW 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 S-GW Bulk Statistics

This section identifies new S-GW bulk statistics available in release 14.0.

None in this release.

Modified S-GW Bulk Statistics

This section identifies S-GW bulk statistics modified in release 14.0.

The data type for various GTP-C bulk statistics changed from Int32 to Int64 in this release.

GTP-C Schema

Deprecated S-GW Bulk Statistics

This section identifies deprecated S-GW bulk statistics that are no longer supported in release 14.0.

None for this release.

New S-GW Performance Commands

This section identifies new S-GW performance commands available in release 14.0.

None for this release.

Modified S-GW Performance Commands

This section identifies S-GW performance commands modified in release 14.0.

None for this release.

Deprecated S-GW Performance Commands

This section identifies deprecated S-GW performance commands that are no longer supported in release 14.0.

None for this release.

S-GW Security Management Changes as of November 7, 2012

This section provides information on S-GW security management changes in release 14.0.

None for this release.

S-GW Feature Changes as of September 28, 2012

This section provides information on S-GW feature changes in release 14.0.

None for this release.

S-GW Configuration Management Changes as of September 28, 2012

This section provides information on S-GW configuration command changes in release 14.0.

IMPORTANT:

For more information regarding commands in this section, refer to the eHRPD/LTE Command Line Interface Reference for this release.

New S-GW Configuration Commands

This section identifies new S-GW commands available in release 14.0.

accounting stop-trigger

This command configures the trigger point for accounting stop CDR. Default is on session deletion request.

S-GW Service Configuration Mode

    accounting stop-trigger
    custom

    default accounting stop-trigger

For more information regarding this command, refer to the S-GW Service Configuration Mode Commands chapter in the Command Line Interface Reference.

Modified S-GW Configuration Commands

This section identifies S-GW commands modified in release 14.0.

None for this release.

Deprecated S-GW Configuration Commands

This section identifies deprecated S-GW commands that are no longer supported in release 14.0.

None for this release.

S-GW Performance Management Changes as of September 28, 2012

This section provides information on S-GW 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 S-GW Bulk Statistics

This section identifies new S-GW bulk statistics available in release 14.0.

None in this release.

Modified S-GW Bulk Statistics

This section identifies S-GW bulk statistics modified in release 14.0.

The data type for the following bulk statistics changed from Int32 to Int64:

S-GW Schema

- datastat-uplink-qci1totpkt
- datastat-uplink-qci2totpkt
- datastat-uplink-qci3totpkt
- datastat-uplink-qci4totpkt
- datastat-uplink-qci5totpkt
- datastat-uplink-qci6totpkt
- datastat-uplink-qci7totpkt
- datastat-uplink-qci8totpkt
- datastat-uplink-qci9totpkt
- datastat-uplink-othertotbyte
- datastat-uplink-othertotpkt
- datastat-downlink-qci1totpkt
- datastat-downlink-qci2totpkt
- datastat-downlink-qci3totpkt
- datastat-downlink-qci4totpkt
- datastat-downlink-qci5totpkt
- datastat-downlink-qci6totpkt
- datastat-downlink-qci7totpkt
- datastat-downlink-qci8totpkt
- datastat-downlink-qci9totpkt
- datastat-downlink-othertotbyte
- datastat-downlink-othertotpkt

Deprecated S-GW Bulk Statistics

This section identifies deprecated S-GW bulk statistics that are no longer supported in release 14.0.

None for this release.

New S-GW Performance Commands

This section identifies new S-GW performance commands available in release 14.0.

None for this release.

Modified S-GW Performance Commands

This section identifies S-GW performance commands modified in release 14.0.

show sgw-service

The following fields have been added to the output of this command:

- Delay Paging Msgs Demux SMGR Peer

Exec Mode

    show sgw-service statistics
    all

Deprecated S-GW Performance Commands

This section identifies deprecated S-GW performance commands that are no longer supported in release 14.0.

None for this release.

S-GW Security Management Changes as of September 28, 2012

This section provides information on S-GW security management changes in release 14.0.

None for this release.

S-GW Feature Changes as of July 31, 2012

This section provides information on S-GW feature changes in release 14.0.

None for this release.

S-GW Configuration Management Changes as of July 31, 2012

This section provides information on S-GW configuration command changes in release 14.0.

None for this release.

S-GW Performance Management Changes as of July 31, 2012

This section provides information on S-GW 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 S-GW Bulk Statistics

This section identifies new S-GW bulk statistics available in release 14.0.

None in this release.

Modified S-GW Bulk Statistics

This section identifies S-GW bulk statistics modified in release 14.0.

The data type for the following bulk statistics changed from Int32 to Int64:

S-GW Schema

- datastat-uplink-qci1totbyte
- datastat-uplink-qci2totbyte
- datastat-uplink-qci3totbyte
- datastat-uplink-qci4totbyte
- datastat-uplink-qci5totbyte
- datastat-uplink-qci6totbyte
- datastat-uplink-qci7totbyte
- datastat-uplink-qci8totbyte
- datastat-uplink-qci9totbyte
- datastat-downlink-qci1totbyte
- datastat-downlink-qci2totbyte
- datastat-downlink-qci3totbyte
- datastat-downlink-qci4totbyte
- datastat-downlink-qci5totbyte
- datastat-downlink-qci6totbyte
- datastat-downlink-qci7totbyte
- datastat-downlink-qci8totbyte
- datastat-downlink-qci9totbyte

Deprecated S-GW Bulk Statistics

This section identifies deprecated S-GW bulk statistics that are no longer supported in release 14.0.

None for this release.

New S-GW Performance Commands

This section identifies new S-GW performance commands available in release 14.0.

None for this release.

Modified S-GW Performance Commands

This section identifies S-GW performance commands modified in release 14.0.

show sgw-service

The following fields have been added to the output of this command:

- Delay Paging Msgs Demux SMGR Peer

Exec Mode

    show sgw-service statistics
    all

Deprecated S-GW Performance Commands

This section identifies deprecated S-GW performance commands that are no longer supported in release 14.0.

None for this release.

S-GW Security Management Changes as of July 31, 2012

This section provides information on S-GW security management changes in release 14.0.

None for this release.

S-GW Feature Changes as of June 29, 2012

This section provides information on S-GW feature changes in release 14.0.

IMPORTANT:

For more information regarding features in this section, refer to the S-GW Administration Guide for this release.

New S-GW Features

This section identifies new S-GW features available in release 14.0.

Dynamic GTP Echo Timer

The dynamic echo timer has been added in this release to enable the eGTP and GTP-U services to better manage GTP paths during network congestion. As opposed to the default echo timer which uses fixed intervals and retransmission timers, the dynamic echo timer uses a calculated round trip timer (RTT) that is generated once a full request/response procedure has completed. A multiplier can be added to the calculation for additional support during congestion periods.

This feature encompasses a number of command changes. Refer to the New, Modified and Deprecated, S-GW Commands sections in this chapter for additional information.

Downlink Delay Notification Value Handling

This feature provides for the handling of delay value information elements (IEs) at the S-GW. When a delay value is received at the S-GW from a particular MME, the S-GW delays sending data notification requests for all idle calls belonging to that particular MME. Once the timer expires, requests can be sent. The delay value at the S-GW is determined by the factor received in the delay value IE (as a part of either a Modify Bearer Request or a Data Downlink Notification Request) and a hard-coded base factor of 50 ms at the S-GW.

Downlink Delay Notification Throttling

As part of the DDN Value Handling feature, an additional set of controls has been introduced allowing the S-GW to set factors that “throttle” the continuous sending and receiving of DDN messages.

This feature encompasses a number of command changes. Refer to the Modified S-GW Commands sections in this chapter for additional information.

Idle-mode Signaling Reduction Support

The S-GW now supports Idle-mode Signaling Reduction (ISR) allowing for a control connection to exist between an S-GW and an MME and S4-SGSN. The S-GW stores mobility management parameters from both nodes while the UE stores session management contexts for both the E-UTRAN and GERAN/UTRAN. This allows a UE, in idle mode, to move between the two network types without needing to perform racking area update procedures, thus reducing the signaling previously required.

ISR support on the S-GW is embedded and no configuration is required, however, an optional feature license is required to enable this feature.

Closed Subscriber Group Support

The S-GW supports the following Closed Subscriber Group (CSG) Information Elements (IEs) and Call Detail Record:

- User CSG Information (UCI) IE in S5/S8
- CSG Information Reporting Action IE and functionality in S5/S8
- An SGW-CDR that includes a CSG record

Modified S-GW Features

This section identifies S-GW features modified in release 14.0. There are two kinds of modified features: enhancements and behavior changes. Enhancements are feature changes based on customer change requests. Behavior changes are feature changes that modify an existing behavior and may result from software error corrections (bug fixes).

EPS Bearer Setup Reporting Behavior Change

In previous releases, the only EPS bearer setup statistics was EPS bearer setup success. What was needed was a way to identify bearer setup failures.

Previous Behavior: No counter or statistics available to identify EPS bearer setup attempts to allow for calculating bearer setup failures.

New Behavior: A new counter now exists in the output of the show sgw-service statistics command and in the S-GW schema as a bulk statistic.

For more information regarding EPS bearer setup attempts reporting, refer to the S-GW Performance Management Changes section in this chapter.

Modify Bearer Request Forwarding Behavior Change

This change applies to the forwarding of the Modify Bearer Request (MBR) message from the S-GW to the P-GW.

Previous Behavior: The S-GW would forward MBRs to the P-GW without checking to see if the ULI, UCI, timezone, or RAT type had actually changed.

New Behavior: The S-GW now forwards MBRs to the P-GW only if one of the above parameters has changed. The S-GW will only forward the changed parameter.

Delete Session Request Forwarding Behavior Change

This change applies to the forwarding of timezone information from the S-GW to the P-GW after receiving it in a Delete Session Request (DSR) message from an MME.

Previous Behavior: The S-GW did not forward the timezone to the P-GW if it received one in a DSR message.

New Behavior: The S-GW now forwards the timezone to the P-GW if it is received in a DSR message.

S-GW Configuration Management Changes as of June 29, 2012

This section provides information on S-GW configuration command changes in release 14.0.

IMPORTANT:

For more information regarding commands in this section, refer to the eHRPD/LTE Command Line Interface Reference for this release.

New S-GW Configuration Commands

This section identifies new S-GW commands available in release 14.0.

page-ue

This command has been added in support of the P-GW initiated CBR/MBR/UBR procedures collision scenario.

S-GW Service Configuration Mode

    [ default | no ] page-ue
    pgw-initiated-proc

For more information regarding this command, refer to the S-GW Service Configuration Mode Commands chapter of the eHRPD/LTE Command Line Interface Reference.

gtpc echo-retransmission-timeout

This command has been added to support the Dynamic GTP Echo feature.

eGTP Service Configuration Mode

    gtpc echo-retransmission-timeout seconds

For more information regarding the Dynamic GTP Echo feature, refer to the S-GW Feature section in this chapter. For more information regarding thegtpc echo-retransmission-timeout command, refer to the eGTP Service Configuration Mode Commands chapter in the eHRPD/LTE Command Line Interface Reference.

echo-retransmission-timeout

This command has been added to support the Dynamic GTP Echo feature.

GTP-U Service Configuration Mode

    echo-retransmission-timeout seconds

For more information regarding the Dynamic GTP Echo feature, refer to the S-GW Feature section in this chapter. For more information regarding theecho-retransmission-timeout command, refer to the GTP-U Service Configuration Mode Commands chapter in the eHRPD/LTE Command Line Interface Reference.

gtpp attribute served-pdp-pdn-address-extension

This command now allows a new field to be added to SGW-CDRs for served PDP PDN address extensions.

GTPP Server Group Configuration Mode

    gtpp attribute served-pdp-pdn-address-extension

For more information regarding this command, refer to the GTPP Server Group Configuration Mode Commands chapter in the eHRPD/LTE Command Line Interface Reference.

Modified S-GW Configuration Commands

This section identifies S-GW commands modified in release 14.0.

ddn

This command has been modified in support of the DDN Throttling feature.

S-GW Service Configuration Mode

    ddn throttle arp-watermark arp_value [ rate-limit limit time-factor seconds throttle-factor percent increment-factor percent [ poll-interval seconds ] throttle-time-sec seconds [ throttle-time-min minutes ] [ throttle-time-hour hour ] stab-time-sec seconds [ stab-time-min minutes ] [ stab-time-hour hour ]

    no ddn throttle

For more information regarding the ddn throttle command, refer to the S-GW Service Configuration Mode Commands chapter of the eHRPD/LTE Command Line Interface Reference.

gtpc echo-interval

This command has been modified to support the Dynamic GTP Echo feature. The gtpc echo-interval command now supports dynamic echo with the addition of the dynamic option. When enabled, the dynamic echo interval feature uses a calculated round trip timer (RTT) and can optionally add a configurable multiplier to be applied to the RTT result.

eGTP Service Configuration Mode

    gtpc echo-interval seconds [ dynamic [ smooth-factor multiplier ] ]

For more information regarding the Dynamic GTP Echo feature, refer to the S-GW Feature section in this chapter. For more information regarding the gtpc echo-interval command, refer to the eGTP Service Configuration Mode Commands chapter of the eHRPD/LTE Command Line Interface Reference.

gtpc retransmission-timeout (Behavior change)

This command has been modified to support the Dynamic GTP Echo feature.

eGTP Service Configuration Mode

    gtpc retransmission-timeout seconds

Previous Behavior: In previous releases, this command controlled the timeout for retransmitting all GTPv2 control messages including echo procedures.

New Behavior: In release 14.0, this command only configures retransmission timeouts for non-echo GTPv1 messages.

IMPORTANT:

No changes were made to the syntax of this command. All changes are embedded.

For more information regarding the Dynamic GTP Echo feature, refer to the S-GW Feature section in this chapter. For more information regarding the gtpc retransmission-timeout command, refer to the eGTP Service Configuration Mode Commands chapter of the eHRPD/LTE Command Line Interface Reference.

echo-interval

This command has been modified to support the Dynamic GTP Echo feature. The echo-interval command now supports dynamic echo with the addition of the dynamic option. When enabled, the dynamic echo interval feature uses a calculated round trip timer (RTT) and can optionally add a configurable multiplier to be applied to the RTT result.

GTP-U Service Configuration Mode

    echo-interval seconds [ dynamic [ smooth-factor multiplier ] ]

For more information regarding the Dynamic GTP Echo feature, refer to the S-GW Feature section in this chapter. For more information regarding the gtpc echo-interval command, refer to the GTP-U Service Configuration Mode Commands chapter of the eHRPD/LTE Command Line Interface Reference.

Deprecated S-GW Configuration Commands

This section identifies deprecated S-GW commands that are no longer supported in release 14.0.

retransmission-timeout

In release 14.0, this command is replaced by the echo-retransmission-timeout command. Refer to the New S-GW Configuration Commands section for information on the echo-retransmission-timeout command.

GTP-U Service Configuration Mode

    retransmission-timeout seconds

S-GW Performance Management Changes as of June 29, 2012

This section provides information on S-GW 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 S-GW Bulk Statistics

This section identifies new S-GW bulk statistics available in release 14.0.

The following bulk statistics are new in this release:

S-GW Schema

- sessstat-isr-curr-active-sess
- sessstat-isr-curr-idle-sess
- sessstat-isr-activations-mme
- sessstat-isr-activations-s4sgsn
- sessstat-isr-deactivations-mme
- sessstat-isr-deactivations-s4sgsn
- sessstat-isr-deactivations-callclear
- totepsbearactive-qci1
- totepsbearactive-qci2
- totepsbearactive-qci3
- totepsbearactive-qci4
- totepsbearactive-qci5
- totepsbearactive-qci6
- totepsbearactive-qci7
- totepsbearactive-qci8
- totepsbearactive-qci9
- totepsbearactive-other
- totepsbearsetup-attempt
- ddn-notification-throttled

Modified S-GW Bulk Statistics

This section identifies S-GW bulk statistics modified in release 14.0.

None for this release.

Deprecated S-GW Bulk Statistics

This section identifies deprecated S-GW bulk statistics that are no longer supported in release 14.0.

None for this release.

New S-GW Performance Commands

This section identifies new S-GW performance commands available in release 14.0.

None for this release.

Modified S-GW Performance Commands

This section identifies S-GW performance commands modified in release 14.0.

show session subsystem facility sessmgr

As part of the GTP-U fast path feature support for the S-GW, the output of this command has been modified to make the fast path counters more generic.

Exec Mode

    show session subsystem
    facility sessmgr

The following fields have been modified in the output of this command:

- Total Sgsn Fast Path statistics updatesThis counter has been replaced by: Total Gtpu Fast Path statistics updates
- Total Sgsn Fast Path out-of-order statistics updatesThis counter has been replaced by: Total Gtpu Fast Path out-of-order statistics updates
- Total Sgsn Fast Path statistics updates lostThis counter has been replaced by: Total Gtpu Fast Path statistics updates lost
- Total Sgsn Fast Path packets lostThis counter has been replaced by: Total Gtpu Fast Path packets lost
- Total Sgsn Fast Path bytes lostThis counter has been replaced by: Total Gtpu Fast Path bytes lost
- Total Sgsn Fast Path packets receivedThis counter has been replaced by: Total Gtpu Fast Path packets received
- Total Sgsn Fast Path bytes receivedThis counter has been replaced by: Total Gtpu Fast Path bytes received

show sgw-service

In support of the S-GW Service mode command, page-ue, which, in turn, supports collision handling at the S-GW, the output of the following command has been modified.

Exec Mode

    show sgw-service all

The following fields have been added to the output of this command:

- Page UE for PGW initiated ProcThis field displays the configuration value of the feature as enabled or disabled.

show sgw-service statistics

In support of the S-GW Idle-mode Signaling Reduction (ISR) feature, the output of the following command has been modified.

Exec Mode

    show sgw-service statistics
    all

The following fields have been added to the output of this command:

- Idle-ISRThis field displays the total number of Idle-mode Signaling Reduction UE sessions currently idle.
- Active-ISRThis field displays the total number of Idle-mode Signaling Reduction UE sessions currently active.
- ISR StatisticsThe fields in this section support the S-GW Idle-mode Signaling Reduction feature.
  - Total ISR Activations
    - MME
    - S4-SGSN
  - Total ISR Deactivations
    - MME
    - S4-SGSN
    - Call Clear

Deprecated S-GW Performance Commands

This section identifies deprecated S-GW performance commands that are no longer supported in release 14.0.

None for this release.

S-GW Security Management Changes as of June 29, 2012

This section provides information on S-GW security management changes in release 14.0.

None for this release.