Cisco Bug: CSCul40539 - ISM: NAT64 IPv6 packets get fragmented on Egress LC on ISM router

Last Modified

Jan 08, 2017

Products (1)

Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

4.3.4.BASE 5.1.1.BASE

Description (partial)

Symptom:
Translated IPv6 packets, even when DF bit was set on the original IPv4 header, might get fragmented on the egress linecard if the IPv6 MTU of next-hop is less than the size of the translated IPv6 packets.

Conditions:
NAT64 with IPv6 MTU of next-hop less than the translated IPV6 packet size.

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