Configuration Prerequisites; Configuration Guidelines; Configuring Ospf Frr To Calculate A Backup Next Hop Using The Lfa Algorithm; Configuring Ospf Frr To Specify A Backup Next Hop Using A Routing Policy - HP 6125XLG Configuration Manual

Configuration prerequisites

Before you configure OSPF FRR, complete the following tasks:
• Configure IP addresses for interfaces to ensure IP connectivity between neighboring nodes.
Enable OSPF.
•

Configuration guidelines

Do not use FRR and BFD at the same time. Otherwise, FRR might fail to take effect.
•
Do not use the fast-reroute lfa command together with the command vlink-peer.
•
Configuring OSPF FRR to calculate a backup next hop using the
LFA algorithm
Step
1. Enter system view.
2. Configure the source address
of echo packets.
3. Enter interface view.
4. Enable LFA calculation on an
interface.
5. Return to system view.
6. Enter OSPF view.
7. Enable OSPF FRR to calculate
a backup next hop by using
the LFA algorithm.
Configuring OSPF FRR to specify a backup next hop using a
routing policy
Before you configure this task, 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 to specify a backup next hop using a routing policy:
Step
1. Enter system view.
Command
system-view
bfd echo-source-ip ip-address
interface interface-type
interface-number
ospf fast-reroute lfa-backup
quit
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] *
fast-reroute lfa [ abr-only ]
Command
system-view
79
Remarks
N/A
By default, the source address of echo
packets is not configured.
N/A
By default, the interface on which LFA
calculation is enabled can be selected
as a backup interface.
N/A
N/A
By default, OSPF FRR is not configured.
If abr-only is specified, the route to the
ABR is selected as the backup path.
Remarks
N/A