R3303-HP HSR6800 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 GR
GR ensures the continuity of packet forwarding when a routing protocol restarts, an active/standby MPU
switchover occurs in standalone mode, or a global active/standby MPU switchover occurs in IRF mode.
• 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
5. Enter system view.
system-view N/A
6. Enable OSPF and enter its
view.
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] *
N/A