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Cisco Bug: CSCvt35452 - Unknown Protocol Drops due to LLDP packets

Last Modified

Mar 19, 2020

Products (1)

  • Cisco Catalyst 9300 Series Switches

Known Affected Releases

16.10.1 16.12.2 16.6.5 16.9.3 17.1.1

Description (partial)

Symptom:
Interface counter incrementing Unknown Protocol Drops

Switch#sh int gig1/0/1
…..
     3 unknown protocol drops

Conditions:
Catalyst 9K running IOS XE 16.6.5, 16.9.3, 16.10.1, 16.12.2, 17.1.1.

LLDP feature has never been enabled on the switch.
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