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Cisco Bug: CSCun84000 - N7K: F3 PortLoopback fails due to Error in Forwarding ASIC MAC GD Block

Last Modified

Aug 31, 2020

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases

6.2(8)S2

Description (partial) 

Symptom:
In Nexus7000, F3 10Gig module may report PortLoopback failures INTERMITTENTLY due to " Error in Forwarding ASIC MAC GD Block".
"show diagnostic result module <mod#>"
<snip>
                Last failure reason ---------> Error in Forwarding ASIC MAC
                                               GD Block
<snip>

Conditions:
This issue is seen ONLY in F3 modules
AND
Failure should be intermittent. The module/port recovers itself after the failures.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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