OSPF graceful helper mode exited due to topology change
In certain network designs, you can safely ignore the network topology change during the failover event depending on how network traffic flows. For example, flaps on out-of-the-way interfaces do not impact network traffic flowing through the failed device. So, in this scenario, we can prevent the firewall from exiting from OSPF Graceful helper mode.
To prevent the firewall from exiting from OSPF Graceful helper mode due to any topology change, we need to disable the "Strict LSA Checking" feature from the OSPF advanced settings.
Follow the below steps to disable 'Strict LSA Checking.'
Take a close look at the impact of topology change in your network design before making this change because inappropriate changes will lead to inconsistent OSPF routing.
From the GUI
- Go to Network > Virtual Routers.
- Select the appropriate Virtual Router > OSPF > Advanced > uncheck 'Strict LSA Checking.'
- Commit the changes.
From the CLI:
Entering configuration mode
Firewall# set network virtual-router default protocol ospf graceful-restart strict-LSA-checking no