3Com S7902E, Руководство по настройке

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To do… Use the command… Remarks
Enable OSPF and enter its
view
ospf [ process-id | router-id
router-id | vpn-instance
instance-name ] *
—
Enable the link-local signaling
capability
enable link-local-signaling
Required
Disabled by default
Enable the out-of-band
re-synchronization capability
enable
out-of-band-resynchronizati
on
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.
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… Use the command… Remarks
Trigger OSPF Graceful Restart
reset ospf [ process - id ]
process graceful-restart
Required
Available in user view
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:
To do… Use the command… Description
Enter system view 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
quit
—
Enter interface view
interface interface-type
interface-number
—