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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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