OSPF convergence time on the firewall

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You can configure the ospf timer deadseconds command on the interface to change the time.
The default convergence time is as follows:
point-to-point: 40 seconds
broadcast: 40 seconds
point-to-multipoint: 120 seconds
non-broadcast: 120 seconds

Other related questions:
How can faster OSPF convergence be achieved
OSPF convergence speed is affected by the following factors: A device detects that the peer link is down and the neighbor relationship becomes invalid; A new link-state advertisement (LSA) is generated and flooded; The Link State Database (LSDB) is updated. A new route is calculated through the Shortest Path First (SPF) routing algorithm and delivered to the Forwarding Information Base (FIB) table. For faster OSPF convergence, you can adjust the following options on the switch: Shorten the hello interval and dead interval of the neighbor, or configure Bidirectional Forwarding Detection (BFD) for fast failure detection; Decrease the spf-schedule-interval (five seconds by default) to shorten the time interval between two SPF algorithm operations; Shorten the LSA generation interval; Shorten the interval of detecting LSA arrival; On the interface, run the ospf trans-delay command to speed up the flooding of LSAs.

Configure an S series switch to accelerate OSPF route convergence
The following network changes affect OSPF route convergence. A device detects that the peer link is down and the neighbor relationship becomes invalid. A new link-state advertisement (LSA) is generated and flooded. The Link State Database (LSDB) is updated. A new route is calculated through the Shortest Path First (SPF) routing algorithm and delivered to the Forwarding Information Base (FIB) table. To accelerate OSPF aggregation, you can perform the following operations on a switch: Set a Hello interval and a Dead interval on the peer device or configure the BFD to rapidly detect failures. Set spf-schedule-interval (of which the default value is 5, in seconds) to a smaller value to shorten the SPF calculation interval. Set the LSA generation interval to a smaller value. Set the LSA arrival check interval to a smaller value. Run the ospf trans-delay command in an interface view to speed up LSA flooding.

What is the minimum BFD convergence time supported by CE series switches
The local detection multiplier determines the detection time of a BFD session. Detection time = Received Detect Multi of the remote system x Max (Local DMTI/Received RMRI). Detect Multi: local detection multiplier, which is set using the detect-multiplier command; Required Min Rx Interval (RMRI): minimum interval for receiving BFD packets, which is set using the min-rx-interval command; Desired Min Tx Interval (DMTI): minimum interval for sending BFD packets, which is set using the min-tx-interval command. The default BFD convergence time is 3s. The minimum BFD convergence time supported by the CE12800 switch is 150 ms, and that supported by the CE7800, CE6800, and CE5800 is 300 ms.

Configuring the OSPF priority on the firewall
The method for modifying the OSPF priority on the USG2000&5000&6000 is as follows: -Modifying the OSPF priority: [USG]ospf [USG-ospf-1]preference 30

Monitoring OSPF and BGP status on the firewall
Perform as follows to monitor OSPF and BGP status on the firewall: 1. Choose Network > Route > Dynamic Route Monitoring Table. 2. On the OSPFv2 Route List page, view detailed OSPFv2 route information. 3. On the BGP Route List page, view detailed BGP route information.

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