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Cisco Bug: CSCut40063 - Fex in AA mode off lines when simultaneous sh tech from both vpc peers

Last Modified

Feb 22, 2017

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases

7.2(0)D1(0.437)

Description (partial)

This issue happens only when "show tech fex" issued from both N7K peers simultaneously. Logs being very huge FEX (satctrl process) becomes busy collecting logs, and not able to respond to SDP messages from n7k and hence fex is taken offline.

Symptom:
2248PQ in AA mode goes offlines while collecting sh tech fex frm both vpcpeer.

SDP packet drops and also module keep alive message drops will be seen at N7k  peers and fex, eventually leading to SDP timeouts and FEX offline event.

Conditions:
"show tech fex" is issued from both peers in FEX-AA setup.

This is because; satctrl process at FEX is busy collecting logs and doesn't send or receive SDP packets in  this duration. This leads to SDP timeouts and fex is taken offline.
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