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Cisco Bug: CSCuj42921 - EMC-ENTRANCE:Port goes to err disable, nack error and speed not supporte

Last Modified

Apr 21, 2014

Products (1)

  • Cisco MDS 9000 Series Multilayer Switches

Known Affected Releases


Description (partial)

In case of some model of SFP, inserting and removing them in quick succession
can cause the read to fail mid-way with nack errors, and the probing of supported
speeds will fail. This causes port to not come up, and "speed not supported by
transceiver" error will be seen, since correct speed was not read from sfp sprom.

Certain model SFP are removed and reinserted.
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  • Full Description (including symptoms, conditions and workarounds)
  • Status
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