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Cisco Bug: CSCuj78478 - 100 M ports come up in "no neg auto" mode in 1C

Last Modified

Feb 05, 2017

Products (2)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3548 Switch

Known Affected Releases

6.0(2)A1(1c)

Description (partial)

Symptom:
When a port is configured as 100M in Eden 1a ports come up in "negotiation auto" mode regardless of configuration because only the "negotiate auto" is supported. In this case, " show run interface eth <> all" still shows "no neg auto"
When the switch is upgraded from 1a to 1c in this state, the port will come up in "no negotiate auto" mode. But the config seems to be active because in 1c, both "no neg auto" and "neg auto" are supported.

Conditions:
Perform an upgrade from Eden 1a to Eden 1c when there exists a saved configure port speed of 100M
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