ICMPv6 Response for Fragmented Packets

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 - Configuration Required

Related Changes in This Release

Not Applicable

Related Documentation

Not Applicable

Revision Details

Release

In this release, P-GW supports Inner Fragmentation with VPP Non-CUPS Deployment.

21.15.x

Feature Changes

Previous Behavior: When an IPv6 packet with IP payload length is more than the data-tunnel-mtu value, ICMPv6 packet too big response is sent and the packet is dropped.

New Behavior: A fragmented IPv6 packet with IP payload length (for all fragments combined) of more than the data-tunnel-mtu value will not be dropped with ICMPv6 packet too big response. The packet is inner fragmented and forwarded with VPP non-CUPS deployment.

Customer Impact: Inner fragmentation is done overriding the policy ipv6 tunnel mtu exceed notify-sender under APN configuration.