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Cisco Bug: CSCvr92476 - Shallow discovery causes port flap if blade is running 4x10 instead of native 40gbps

Last Modified

Dec 12, 2019

Products (1)

  • Cisco Unified Computing System

Known Affected Releases

3.2(3b)B

Description (partial)

Symptom:
Shallow discovery causes port flap if blade is running 4x10 instead of native 40gbps as defined in the backplane-speed-pref

Before the unexpected port flap the backplane interface is 4x10 under connect nxos/show interface brief:
Eth3/1/1       1       eth  vntag  up      none                       10G(D) 1298
Eth3/1/2       1       eth  vntag  up      none                       10G(D) 1298
Eth3/1/3       1       eth  vntag  up      none                       10G(D) 1298
Eth3/1/4       1       eth  vntag  up      none                       10G(D) 1298

After the unexpected port flap the backplane interface is native 40gb under connect nxos/show interface brief:
Eth3/1/1       1       eth  vntag  down    Member port of 40G         10G(D) --
Eth3/1/2       1       eth  vntag  down    Member port of 40G         10G(D) --
Eth3/1/3       1       eth  vntag  down    Member port of 40G         10G(D) --
Eth3/1/4       1       eth  vntag  up        none                               40G(D) --

Conditions:
6332 FI w/2304 IOM
Backplane port speed preference set to 40gbps
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