The show isis counters {area [area_name | all] | vlan [vlan_name | all]} command can
display all counters or only those specific to the router process or the configured
VLANs.
To clear the IS-IS counters for the router and the VLANs,
use the following command:
clear isis
counters
To clear the IS-IS counters only for the router process,
use the following command:
clear isis
counters area [area_name | all]
To clear the IS-IS counters only for one or all VLANs, use
the following command: