Triggering Ospf Gr; Configuring Ospf Nsr - HPE FlexNetwork HSR6800 Configuration Manual

Configuring the non-IETF standard OSPF GR helper
Step
Enter system view.
20.
21. Enable OSPF and enter its
view.
22. Enable the link-local
signaling capability.
23. Enable the out-of-band
re-synchronization
capability.
24. Configure the neighbors for
which the router can serve
as a GR helper.

Triggering OSPF GR

An active/standby MPU switchover in standalone mode, a global active/standby MPU switchover in
IRF mode, or the following command triggers OSPF GR.
To trigger OSPF GR, perform the following command in user view:
Task
Trigger OSPF GR.

Configuring OSPF NSR

In standalone mode, with OSPF NSR, the standby MPU backs up link state information from the
active MPU. Upon an active/standby MPU switchover, the link state information can recover
automatically and the routes can be regenerated without tearing down the adjacencies or impacting
other services.
In IRF mode, with OSPF NSR, the global standby MPU backs up link state information from the
global active MPU. Upon a global active/standby MPU switchover, the link state information can
recover automatically and the routes can be regenerated without tearing down the adjacencies or
impacting other services.
GR requires the cooperation of neighboring devices to recover routing information during the
active/standby MPU switchover period in standalone mode or global active/standby MPU switchover
period in IRF mode. NSR does not require that, and is more popular in practice.
IMPORTANT:
Do not configure OSPF NSR on a device acting as GR restarter.
To enable OSPF NSR:
Step
Enter system view.
1.
Command
system-view
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] *
enable link-local-signaling
enable
out-of-band-resynchronization
graceful-restart help
{ acl-number | prefix prefix-list }
Command
reset ospf [ process-id ] process graceful-restart
Command
system-view
85
Remarks
N/A
N/A
Disabled by default.
Disabled by default.
Optional.
The router can serve as a GR
helper for any OSPF neighbor by
default.
Remarks
N/A