# Configure OSPF multi-instance on PE.
[PE] ospf vpn-instance vpn1
[PE-ospf-1] area 0
[PE-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.3
[PE-ospf-1-area-0.0.0.0] network 10.2.1.0 0.0.0.3
Step 4 Configure the cost value on the OSPF interface.
# Configure the cost value on GigabitEthernet 2/0/0 of PE to enable OSPF to choose the link A
preferentially.
[PE] interface gigabitethernet 2/0/0
[PE-GigabitEthernet2/0/0] ospf cost 100
[PE-GigabitEthernet2/0/0] quit
# Configure the cost value on GigabitEthernet 2/0/0 of RTA to make OSPF choose the link A
preferentially.
[RTA] interface gigabitethernet 2/0/0
[RTA-GigabitEthernet2/0/0] ospf cost 100
[RTA-GigabitEthernet2/0/0] quit
Step 5 Configure a routing policy.
# Configure the routing policy on PE and the backup next hop and backup out-interface, and
configure an if-match clause to limit the application scope.
[PE] ip ip-prefix frr1 permit 10.5.1.0 24
[PE] route-policy ip_frr_rp permit node 10
[PE-route-policy] if-match ip-prefix frr1
[PE-route-policy] apply backup-nexthop 10.2.1.2
[PE-route-policy] apply backup-interface gigabitethernet2/0/0
[PE-route-policy] quit
Step 6 Configure BFD to sense the link status.
# Configure BFD to sense the link status on the PE.
[PE] bfd
[PE-bfd] quit
[PE] bfd for_ip_frr bind peer-ip 10.1.1.2 vpn-instance vpn1 interface
gigabitethernet1/0/0
[PE-bfd-session-for_ip_frr] discriminator local 10
[PE-bfd-session-for_ip_frr] discriminator remote 20
[PE-bfd-session-for_ip_frr] commit
# Configure BFD to sense the link status on the CE1.
[CE1] bfd
[CE1-bfd] quit
[CE1] bfd for_ip_frr bind peer-ip 10.1.1.1 interface gigabitethernet1/0/0
[CE1-bfd-session-for_ip_frr] discriminator local 20
[CE1-bfd-session-for_ip_frr] discriminator remote 10
[CE1-bfd-session-for_ip_frr] commit
# Run the display bfd session all verbose command on the PE and CE1. You can find that the
BFD status is Up.
Step 7 Enable the IP FRR of the private network.
[PE] ip vpn-instance vpn1
[PE-vpn-instance-vpn1] ipv4-family
[PE-vpn-instance-vpn1-af-ipv4] ip frr route-policy ip_frr_rp
[PE-vpn-instance-vpn1-af-ipv4] quit
[PE-vpn-instance-vpn1] quit
# Check information about the backup egress and the backup next hop.
Huawei AR1200 Series Enterprise Routers
Configuration Guide - VPN 3 BGP MPLS IP VPN Configuration
Issue 01 (2012-04-20) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
234
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