R3102-R3103-HP 6600/HSR6600 Routers Layer 3 - IP Routing Configuration Guide

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Configuring OSPF FRR to designate a backup next hop with a routing policy
Before configuring this task, you need to use the apply fast-reroute backup-interface command to specify
a backup next hop in the routing policy to be referenced. For more information about the apply
fast-reroute backup-interface command and routing policy configuration, see "Configuring routing
policies."
To configure OSPF FRR:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Configure the source address
of echo packets.
bfd echo-source-ip ip-address Not configured by default.
3. Enter OSPF view.
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] *
N/A
4. Enable OSPF FRR to
designate a backup next hop
by using a routing policy.
fast-reroute route-policy
route-policy-name
Not configured by default.
Configuring OSPF Graceful Restart
GR ensures the continuity of packet forwarding when a routing protocol restarts or an active/standby
switchover occurs.
• 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 involves:
• 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.
A device can act as a GR Restarter and GR Helper at the same time.
Configuring the OSPF GR Restarter
You can configure the IETF standard or non IETF standard OSPF GR Restarter.
IMPORTANT:
Do not configure OSPF NSR on a device acting as GR Restarter.
Configuring the IETF standard OSPF GR Restarter
Ste
p
Command Remarks
1. Enter system view.
system-view N/A