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Cisco Bug: CSCum03461 - N3064 - Switching-Mode Changes to Store-Forward After Upgrade

Last Modified

Feb 23, 2018

Products (5)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 3016 Switch
  • Cisco Nexus 3064-T Switch
  • Cisco Nexus 3048 Switch

Known Affected Releases

6.0(2)U1(3)

Description (partial)

Symptom:
On a 3064, the switching-mode may change from the default mode (Cut-Through) to Store-Forward. This occurs if the command "mac address-table aging-time xxxx" is in the running-config prior to the upgrade. Use "show run | i switching" command to confirm switching mode in use. If no output is returned, switch is using the default mode, Cut-Through.

Conditions:
"mac address-table aging-time xxxx" is in the running-config prior to the upgrade. This was seen with the following NX-OS combinations, but may be seen when upgrading to 5.0(3)U3(1) and any later images --

- From 5.0.3.U2.2 to 5.0.3.U5.1c 
- From 5.03.U2.2b to 5.0.3.U5.1c
- From 5.0.3U2.2  to 6.0(2)U1(3)
- From 5.0.3U2.2a to 5.0(3)U5(1g)
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Bug Details Include

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