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Cisco Bug: CSCuk54781 - ICMPv6 Packet too big does not account for label stack

Last Modified

Jan 30, 2017

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)


IMCPv6 Type 2. Packet too big does not account for MPLS Label stack.


When a 6PE router attempts to switch an IPv6 packet too big to fit 
in the MPLS encap, the ICMPv6 Packet too big reports the MPLS MTU.

It should report (MPLS MTU) - (label encap size)
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