IPv6 MTU Option Support in RA Message Enhancement

Feature Summary and Revision History

Summary Data

Applicable Product(s) or Functional Area

P-GW

Applicable Platform(s)

  • ASR 5500

  • VPC-DI

  • VPC-SI

Feature Default

Enabled - Always-on

Related Changes in This Release

Not applicable

Related Documentation

  • Command Line Interface Reference

  • P-GW Administration Guide

Revision History

Revision Details

Release

Enhancement to the CLI ipv6 initial-router-advt

21.12.18

Feature Changes

Previous Behavior: The CLI 'ipv6 initial-router-advt option mtu' was used to enable or disable by sending MTU in RA packet.

New Behavior: For the P-GW and SAEGW, an additional option value is added to the existing CLI command ipv6 initial-router-advt option mtu . The configured value must be in octets -integer 1280-2000 . The syntax is as follws: 

ipv6 initial-router-advt { interval int_value | num-advts num_value | option mtu | value } 
[ default ] ipv6 initial-router-advt { interval | num-advts| option mtu | value } 
no ipv6 initial-router-advt option mtu

The configured value is sent in the RA packet rather than the data tunnel MTU.


Important
This value is used only for advertisement in RA packet and the gateway need not enforce this value. The behaviour of 'default' and 'no' options of this CLI remains the same.