show link-keepalive

Sample output

Total link-keepalive enabled ports: 8
Keepalive Retries : 4
Keepalive Interval: 5 sec
Keepalive Mode : verify-then-forward
Physical Keepalive Adjacent UDLD

Port  Enabled Status     Status   Switch    VLAN
----- ------- ---------------- --------- ------------- ----------
1   Yes   down      off-line 000000-000000 untagged
2   Yes   down      off-line 000000-000000 untagged
3   Yes   down      off-line 000000-000000 untagged
4   Yes   down      off-line 000000-000000 untagged
5   Yes   down      off-line 000000-000000 untagged
6   Yes   down      off-line 000000-000000 untagged
7   Yes   down      off-line 000000-000000 untagged
8   Yes   down      off-line 000000-000000 untagged