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ePDG Administration Guide, StarOS Release 21.3

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The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.

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Book Title

ePDG Administration Guide, StarOS Release 21.3

Chapter Title

Send DSReq if new PGW is selected during re-attach

Results

Updated:
September 6, 2017

Chapter: Send DSReq if new PGW is selected during re-attach

Send DSReq if new PGW is selected during re-attach

The ePDG will send the delete session request during reattach if another PGW is selected for current session. If the same PGW is selected for current session during reattach, ePDG will not send the delete session request to PGW and will do local purge.

In case of session creation failure during reattach, ePDG will always trigger delete session request to PGW.

This feature can be enabled by configuring “newcall duplicate-session notify-delete” in ePDG Configuration Mode.

Scope and Assumptions

Scope

  1. ePDG will trigger the delete session request if another PGW is selected in case of session successfully created.

  2. In case of session creation failure, ePDG will always trigger the delete session request to old PGW.

  3. If CLI is not configured then ePDG will do local purge during reattach.

Assumption

ePDG will recover PGW address in session recovery as well as ICSR.

Configuring Send DSReq if new PGW is selected feature

ip

With this release ip { inner | outer } | ikev2-mtu | mtu value } is introduced in Crypto Template config mode. 

configure
     crypto template
				      ip { inner | outer } | ikev2-mtu value  }
          default ip { fragment | ikev2 | mtu }
     end

Performance Indicator Changes

show crypto {map | template}

The following show output is added to show crypto {map | template} command as part of this release.

  • IPv4 Payload fragment type

show epdg-service statistics

The following show output is added to show epdg-service statistics command as part of this release.

  • Total Fragmented Packets

  • Total Fragments Sent

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