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Cisco Bug: CSCus53913 - AppNav: Tunnel MTU results in fragmentation after Tunnel interface flap

Last Modified

Jan 30, 2017

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.5(3)S

Description (partial)

Symptom:
"show ip traffic" is showing fragments when AppNav (or DPSS) is being used. Redirected packets are dropped by the SN and not returned.

Conditions:
"show ip traffic" is showing fragments. Either the SN facing interface is configured with > 1500 bytes mtu. Or > 1500 bytes packets are diverted.

Tunnel interface for AppNav went down and come back up shortly before the traffic drop begins.
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