Re-enabling OSPFv3 graceful restart helper

1. Enter the configure terminal command to access global configuration mode.
   

   device# configure terminal

2. Enter the ipv6 router ospf command to enter OSPFv3 router configuration mode and enable OSPFv3 globally.
   

   device(config)# ipv6 router ospf

3. Enter the graceful-restart helper command and specify the strict-lsa-checking parameter to re-enable the GR helper with strict LSA checking.
   

   device(config-ipv6-router-ospf-vrf-default-vrf)# graceful-restart helper strict-lsa-checking

The following example re-enables the GR helper with strict LSA checking.

device# configure terminal
device(config)# ipv6 router ospf 
device(config-ipv6-router-ospf-vrf-default-vrf)# graceful-restart helper strict-lsa-checking