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Cisco Bug: CSCvt03274 - C9200L uplink doesn't detect link down when one pair of the fiber cable is unplugged

Last Modified

Sep 28, 2020

Products (1)

  • Cisco Catalyst 9200-L Series Switches

Known Affected Releases

16.12.2

Description (partial)

Symptom:
C9200L uplink doesn't detect link down when one pair of the fiber cable is unplugged on C9200L side

peer side detects link down immediately
C9200L doesn't detect link down for 45-60 seconds (remains up/up), and detect errdisable by UDLD error after that, if UDLD is configured.

Conditions:
C9200L switch
fiber transceiver is inserted in one of the interfaces on uplink module

Tx fiber is being disconnected on C9200L side
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Bug Details Include

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