HP 5500 EI series User Manual

89
Two routers are required to complete a GR process. The following are router roles in a GR process.
• GR restarter—Graceful restarting router. It must have GR capability.
• GR helper—A neighbor of the GR restarter. It helps the GR restarter to complete the GR process.
OSPF GR has the following types:
• IETF GR—Uses Opaque LSAs to implement GR.
• Non-IETF GR—Uses link local signaling (LLS) to advertise GR capability and uses out of band
synchronization to synchronize the LSDB.
A device can act as a GR restarter and GR helper at the same time.
Configuring OSPF GR restarter
You can configure the IETF or non IETF OSPF GR restarter.
Configuring the IETF OSPF GR restarter
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 capability.
opaque-capability enable
By default, opaque LSA reception
and advertisement capability is
enabled.
4. Enable the IETF GR.
graceful-restart ietf [ global |
planned-only ] *
By default, the IETF GR capability is
disabled.
5. (Optional.) Configure GR
interval.
graceful-restart interval
interval-value
The default setting is 120 seconds.
Configuring the non-IETF OSPF GR restarter
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
By default, the link-local signaling
capability is disabled.
4. Enable the out-of-band
re-synchronization capability.
enable
out-of-band-resynchronization
By default, the out-of-band
re-synchronization capability is
disabled.
5. Enable non-IETF GR.
graceful-restart [ nonstandard ]
[ global | planned-only ] *
By default, non-IETF GR capability
is disabled.
6. (Optional.) Configure GR
interval.
graceful-restart interval
interval-value
The default setting is 120 seconds.

HP 5500 EI series Specifications

General

Brand	HP
Model	5500 EI series
Category	Switch
Language	English