To view graceful restart information for IS-IS and OSPF, configure traceoptions (see Tracking Graceful Restart Events).
Here is the output of a traceoptions log from an OSPF restarting router:
Oct 8 05:20:12 Restart mode - sending grace lsas Oct 8 05:20:12 Restart mode - estimated restart duration timer triggered Oct 8 05:20:13 Restart mode - Sending more grace lsas
Here is the output of a traceoptions log from an OSPF helper router:
Oct 8 05:20:14 Helper mode for neighbor 192.255.5.1 Oct 8 05:20:14 Received multiple grace lsa from 192.255.5.1