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Cisco Bug: CSCuw49153 - Tomahawk MH Improve error correction in receive dir for x120 phy stuck

Last Modified

Jul 21, 2018

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

Bringing up new links or after a fiber cut. The links get into a unidirectional traffic forwarding condition.ASR9K is able to transmit traffic. But receive packets will be dropped.

This is an interoperability issue between ASR 9000 (A9K-8X100-SE/TR or A9K-4X100-SE/TR) and M6 / NCS2K-100G-CK linecard.  

This issue is not applicable to PIDs A9K-8X100-L-SE/TR, A9K-2X100G-SE/TR and A9K-1X100-SE/TR. 

The issue happens only when link flaps or comes up in DWDM core network or trunk port. 

A9K-8X100GE-TR (or A9K-8X100GE-TR) <-> CPAK-100G-SR10 (on ASR card) <-> CPAK-100G-SR10 (on optical card) <->
NCS2K-200G-CK-LIC (DWDM w/ 20% SD FEC) <-> 600  to 1000 km optical fiber with MSTP amps, ROADMs, etc. <->
NCS2K-200G-CK-LIC (DWDM w/ 20% SD FEC) <-> CPAK-100G-SR10 (on optical card) <->
CPAK-100G-SR10 (on ASR card) <-> A9K-8X100GE-TR (or A9K-8X100GE-TR)

Related Community Discussions

XR 5.3.1 recommended SMU set for Tomahawk linecards
The following is a recommendation for running 5.3.1 with tomahawk linecards. The recommended set supersedes a number of posted or in the process of posting smu's. Since they are superseded by this set, there is no need to run them and to simplify the smu's for 531, have been removed. Recommended set: asr9k-px-5.3.1.CSCuw65671.pie and txt asr9k-px-5.3.1.CSCux07434.pie and txt asr9k-px-5.3.1.CSCuw94704.pie and txt asr9k-px-5.3.1.CSCux07751.pie and txt asr9k-px-5.3.1.CSCuv61090.pie and txt asr9k-px-5.3.1.CSCuw15926.pie ...
Latest activity: Mar 18, 2016
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