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Cisco Bug: CSCuo93631 - N7K MAC address in hardware but missing from software after ISSU

Last Modified

Jan 25, 2019

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases

7.1(0)D1(0.143) 7.1(0)D1(0.146) 7.1(0)D1(0.153)

Description (partial)

Symptom:
Nexus 7000 does not learn new MAC addresses in software after ISSU.

"show hardware mac address-table <x>" contains MAC entry in hardware (x = ingress module in question) 

"show mac address-table" does not contain MAC entry in software

Conditions:
a) ISSU performed on N7K
b) In combination with ISSU, a new learn mac address caused by a new mac, or a flush of the mac table and re-learn of existing macs while system is undergoing ISSU.

Related Community Discussions

Nexus 7000/7700 で ISSU 後、F3 モジュールで MAC address が学習されない
2014年10月23日(初版) TAC SR Collection 主な問題 Nexus 7000/7700 シリーズスイッチで ISSU 後、F3 モジュールで新しく MAC 学習されず、MAC address table にもエントリが載らない。 原因 不具合<key>CSCuo93631</key> が原因である可能性があります。 該当しているかどうかを確かめるには、F3 モジュールにアタッチし、以下のコマンドを使ってください。 ( F3 モジュールが slot 1 にある場合の例です ) | N7K# attach module 1 Attaching to module 1 ... To exit type 'exit', to abort type '$.' module-1# show system internal mtm info global | inc sup_ack nl_mv_rd num_ack_pending 1 sup_ack_pending 1 &quot;sup_ack_pending 1&quot; | となっていれば不具合に該当しています。 解決策 <key>CSCuo93631</key> に該当している場合の回避策はいくつかあります。以下のいずれかをご実施ください。 ...
Latest activity: Oct 23, 2014
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