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Cisco Bug: CSCuj62175 - 4500 VSS EVN no connectivity after applying and removing CTS

Last Modified

Jul 21, 2014

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)

On the 4500 VSS platform connected to some switch once CTS is applied and removed from the interface, there is no more connectivity in all VRFs - no arp entry. 4500 VSS drops ARP response.

Once debug k5cpumapacketdropped is enabled we can see the following:

*Oct  3 13:54:41.914: Packet Dropped: Reason: Packet has no local txInfos EventCode 33 Port ? Vlan 65535 FwdVlan 65535Src 00:08:E3:FF:FC:28 Dst 00:1B:2A:67:FD:3F Type/Len 0x8100

and the packet never gets back to other end so we can see incomplete ARP entry on the switch connected to the VSS.

When cts is applied and removed from the interface where vnet trunk is configured
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