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Cisco Bug: CSCtd08797 - Tagtotag w/ port-channel - Pkts route-cached, MLS CEF adj has MTU as 0

Last Modified

Mar 01, 2018

Products (1)

  • Cisco 7600 Series Routers

Known Affected Releases

12.2(33)SRD3

Description (partial)

Symptoms: MPLS packets are software switched when port-channel interfaces are
the MPLS interfaces. Affects tag-to-tag traffic. 

Conditions: Issue is seen after the router is upgraded to Cisco IOS Release
12.2(33)SRD3. The MTU for the MLS CEF adjacency for the MPLS label is
misprogrammed and shows up as 0. Should see "MTU failures" incrementing in
<CmdBold>show mls stat<noCmdBold>.
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  • Status
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