3com S7906E Manuel De Montage

 

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Enable OSPF and enter its 
view 

ospf [ process-id | router-id 
router-id | vpn-instance 
instance-name ] * 

— 

Enable the link-local signaling 
capability 

Required 

Disabled by default 

Enable the out-of-band 
re-synchronization capability 

Required 

Disabled by default 

Configure the neighbors for 
which the router can serve as a 
GR Helper 

graceful-restart help 
{ acl-number | prefix prefix-list }

Optional 

The router can server as a GR 
Helper for any OSPF neighbor 
by default. 

 

Performing an active/standby switchover on a distributed device, or performing the following 

configuration on an OSPF router will trigger OSPF Graceful Restart.  

Follow these steps to trigger OSPF Graceful Restart: 

Trigger OSPF Graceful Restart 

reset ospf [ process-id ] 
process graceful-restart 

Required 

Available in user view 

 

After discovering neighbors by sending hello packets, OSPF notifies BFD of the neighbor addresses, 

and BFD uses theses addresses to establish sessions. Before a BFD session is established, it is in the 

Down state. In this state, BFD control packets are sent at an interval of not less than one second to 

reduce BFD control packet traffic. After the BFD session is established, BFD control packets are sent at 

the negotiated interval, thereby implementing fast fault detection. To configure BFD for OSPF, you need 

to configure OSPF first.  

Follow these steps to enable BFD on an OSPF interface: 

Enter system view 

— 

Enable an OSPF process and enter its 
view 

ospf [ process-id | router-id 
router-id | vpn-instance 
instance-name ] * 

— 

Specify a network to enable OSPF on the 
interface attached to the network 

network ip-address wildcard-mask  — 

Exit to system view 

— 

Enter interface view 

interface interface-type 
interface-number 

—