R2511-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V5)

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• IETF standard GR—Uses Opaque LSAs to implement GR.
• Non IETF standard GR—Uses link local signaling (LLS) to advertise GR capability and uses out of
band synchronization to synchronize the LSDB.
Configuring the OSPF GR helper
You can configure the IETF standard or non IETF standard OSPF GR helper.
Configuring the IETF standard OSPF GR helper
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enable OSPF and enter its
view.
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] *
N/A
3. Enable opaque LSA reception
and advertisement.
opaque-capability enable Not enabled by default.
4. 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 serve as a GR
helper for any OSPF neighbor by
default.
Configuring the non-IETF standard OSPF GR helper
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enable OSPF and enter its
view.
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] *
N/A
3. Enable the link-local signaling
capability.
enable link-local-signaling Disabled by default.
4. Enable the out-of-band
re-synchronization capability.
enable
out-of-band-resynchronization
Disabled by default.
5. 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 serve as a GR
helper for any OSPF neighbor by
default.
Triggering OSPF GR
An OSPF Graceful Restart can be triggered by execution of the reset ospf [ process-id ] process
graceful-restart command on an OSPF router.
To trigger OSPF Graceful Restart, perform the following command in user view:
Task Command
Trigger OSPF Graceful Restart. reset ospf [ process-id ] process graceful-restart