H3C Technologies H3C S6800 Series Switches - Manual (Page 281)

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Table 22 Interface and IP address assignment
Device Interface IP address Device Interface IP address
CE 1 Loop0 5.5.5.5/32 PE 1 Loop0 1.1.1.1/32
Vlan-int10 10.2.1.1/24 Vlan-int10 10.2.1.2/24
PE 2 Loop0 2.2.2.2/32 Vlan-int11 172.1.1.1/24
Vlan-int11 172.1.1.2/24 Vlan-int12 172.2.1.1/24
Vlan-int13 10.1.1.2/24 CE 2 Loop0 4.4.4.4/32
PE 3 Loop0 3.3.3.3/32 Vlan-int13 10.1.1.1/24
Vlan-int12 172.2.1.3/24 Vlan-int14 10.3.1.1/24
Vlan-int14 10.3.1.2/24
Configuration procedure
1. Configure IP addresses and masks for interfaces as shown in Table 22 , and configure BGP and
MPLS L3VPN. (Details not shown.)
For more information about configuring basic MPLS L3VPN, see "
Configuring basic MPLS
L3VPN ."
2. Configure MPLS L3VPN FRR on PE 1:
# Configure BFD to test the connectivity of the LSP to 2.2.2.2/32.
<PE1> system-view
[PE1] mpls bfd enable
[PE1] mpls bfd 2.2.2.2 32
# Create routing policy frr, and specify the backup next hop as 3.3.3.3 for the route to
4.4.4.4/32.
[PE1] ip prefix-list abc index 10 permit 4.4.4.4 32
[PE1] route-policy frr permit node 10
[PE1-route-policy] if-match ip address prefix-list abc
[PE1-route-policy] apply fast-reroute backup-nexthop 3.3.3.3
[PE1-route-policy] quit
# Configure FRR for VPN instance vpn1 to reference routing policy frr.
[PE1] bgp 100
[PE1-bgp] ip vpn-instance vpn1
[PE1-bgp-vpn1] address-family ipv4 unicast
[PE1-bgp-ipv4-vpn1] fast-reroute route-policy frr
[PE1-bgp-ipv4-vpn1] quit
[PE1-bgp-vpn1] quit
# Specify the preferred value as 100 for BGP VPNv4 routes received from PE 2. This value is
greater than the preferred value (0) for routes from PE 3, so PE 1 prefers the routes from PE 2.
[PE1-bgp] address-family vpnv4
[PE1-bgp-vpnv4] peer 2.2.2.2 preferred-value 100
[PE1-bgp-vpnv4] quit
[PE1-bgp] quit
3. Enable MPLS BFD on PE 2.
<PE2> system-view