Triggering Ospf Graceful Restart - 3Com S7906E Configuration Manual

To do...
Enable OSPF and enter its
view
Enable the link-local signaling
capability
Enable the out-of-band
re-synchronization capability
Configure the neighbors for
which the router can serve as a
GR Helper

Triggering OSPF Graceful Restart

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:
To do...
Trigger OSPF Graceful Restart
Configuring BFD for OSPF
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
Specify a network to enable OSPF on the
interface attached to the network
Exit to system view
Enter interface view
Use the command...
ospf [ process-id | router-id
router-id | vpn-instance
instance-name ] *
enable link-local-signaling
enable
out-of-band-resynchronizati
on
graceful-restart help
{ acl-number | prefix prefix-list }
Use the command...
reset ospf [ process-id ]
process graceful-restart
To do... Use the command...
system-view
ospf [ process-id | router-id
router-id | vpn-instance
instance-name ] *
network ip-address wildcard-mask
quit
interface interface-type
interface-number
1-47
Remarks
—
Required
Disabled by default
Required
Disabled by default
Optional
The router can server as a GR
Helper for any OSPF neighbor
by default.
Remarks
Required
Available in user view
Description
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