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Cisco Bug: CSCum78930 - CMCC XM:ASR1013-CB--ICMPv6 packet-too-big is dropped by ZBFW

Last Modified

Jan 30, 2017

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.2(4)S 15.3(3)S 15.4(1)S 15.4(2)S n/a

Description (partial)

Symptom:
The ICMPv6 error packet (too-big packet) with icmpv6 echo reply as payload is dropped by ZBFW.

Conditions:
If the intermediate hosts generate icmpv6 error packets with icmpv6 echo reply as
pay load without properly fragmenting the packets as per the mtu of the v6 packet
flow, such icmpv6 errors packets will be dropped.
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Bug Details Include

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  • Status
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