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Cisco Bug: CSCum08957 - Core Typhoon LC drops FAT-PW traffic with dst mac starting with 4 or 6

Last Modified

Feb 02, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

Traffic going over a FAT-PW is dropped.

Can be seen in the NP counters as drops in PARSE_DROP_ING_MPLS_LABEL_INVALID and RSV_DROP_ING_MPLS_PLU.

ASR9000 L2VPN PE running 4.3.x is a disposition PE of a FAT-PW (so with pw-class configured with flow-label).

The core LC receiving the MPLS frame must be a Typhoon (Enhanced Ethernet) linecard.

The destination MAC address following the FAT-PW VC label and the MPLS flow label must start with 4 or 6.

Related Community Discussions

ASR9000 DDTS Fixed-in (?)
Hi all Can anyone explain how to make sense of the fixed-in releases listed in the bug tool? Specifically, I am looking at a DDTS (<key>CSCum08957</key>) which is listed as &quot;known fixed&quot; in Well, I run 5.1.2, and an &quot;admin show ver&quot; gives me: =====SNIP===== asr9k-base, V 5.1.2[Default], Cisco Systems, at disk0:asr9k-base-5.1.2 =====SNAP===== So, does that mean that I'm in the clear? - I guess not... I can't find any SMU regarding the specific DDTS. Is the only way forward repropducing the effect ...
Latest activity: Sep 02, 2014
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