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Cisco Bug: CSCtn81109 - Diagnostic test fails N7K-M132XP-12 randomly on reload of a N7K

Last Modified

Feb 13, 2018

Products (3)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch

Known Affected Releases

5.1(3)

Description (partial)

Symptom:
On the Nexus7000, N7K-M132XP-12 modules may report diagnostic failures after
bootup.

"show diagnostic result module X" shows one or more ports failing PortLoopback
and/or BootupLoopback  test.

"show diagnostic result module <mod#> detail":
5) PortLoopback:
          Port  17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 
          -----------------------------------------------------
                 U  U  .  .  .  .  E  .  U  U  E  .  .  E  E  E <<===

Nexus7000 may also report following message:
%MODULE-4-MOD_WARNING: Module X (serial: <serial#>) reported warning on ports
x/y-x/y (Ethernet) due to Loopback test failed.

10) BootupPortLoopback:
          Port   1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 
          -----------------------------------------------------
                 .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  
          Port  17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 
          -----------------------------------------------------
                 .  .  .  .  .  .  .  .  .  F  .  .  .  .  F  . <<===

Conditions:
- Issue is experienced immediately after switch reboot (not at every reboot,
random behavior)
- Failed ports may recover after some time.
- Failing ports need not be successive.

Related Community Discussions

スイッチの起動後、N7K-M132XP-12 上のいくつかのポートで diag test が失敗する
2011年10月19日(初版) TAC SR Collection 主な問題 スイッチの起動後、N7K-M132XP-12 上のポートで PortLoopback テストもしくは  BootupPortLoopback で Failure(F) または Error disabled(E) を検出する可能性があります。 原因 <key>CSCtn81109</key> で報告されているソフトウェア不具合の影響です。
Latest activity: Jun 01, 2012
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  • Status
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  • Related Community Discussions
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