OSPFv2 non-stop routing (NSR) can be re-enabled if it has been disabled. The following task re-enables NSR for OSPFv2.
Note
GR is mutually exclusive to NSR.device# configure terminal
device(config)# router ospf
device(config-router-ospf-vrf-default-vrf)# nonstop-routing
The following example re-enables NSR for OSPFv2.
device# configure terminal device(config)# router ospf device(config-router-ospf-vrf-default-vrf)# nonstop-routing