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.
Workaround
Enable globally LLDP feature and save the configuration:
(config-t)#lldp run
