292
10.2.1.1/32 Direct 0 0 127.0.0.1 Inloop0
10.2.1.255/32 Direct 0 0 10.2.1.1 Vlan2
10.3.1.0/24 BGP 255 0 10.2.1.2 Vlan2
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
127.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
200.1.1.1/32 BGP 255 0 10.2.1.2 Vlan2
224.0.0.0/4 Direct 0 0 0.0.0.0 NULL0
224.0.0.0/24 Direct 0 0 0.0.0.0 NULL0
255.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
257B
Configuring MPLS L3VPN FRR through VPNv4 route backup
for a VPNv4 route
510B
Network requirements
CE 1 and CE 2 belong to VPN 1.
Configure EBGP between CEs and PEs to exchange VPN routes.
Configure OSPF to ensure connectivity between PEs, and configure MP-IBGP to exchange VPNv4
routing information between PEs.
Configure MPLS L3VPN FRR on PE 1 to achieve the following purposes:
•
When the link PE 1—PE 2 operates correctly, traffic from CE 1 to CE 2 goes through the path
CE 1—PE 1—PE 2—CE 2.
•
When BFD detects that the LSP between PE 1 and PE 2 fails, traffic from CE 1 to CE 2 goes
through the path CE 1—PE 1—PE 3—CE 2.
Figure 78 Network diagram
Table 24 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
CE 2
CE 1
VPN 1
VPN 1
MPLS backbone
PE 2
PE 1
PE 3
Vlan-int13
Vlan-int14
Vlan-int13
Vlan-int11
Vlan-int14
Vlan-int12
Vlan-int11
Vlan-int12
Vlan-int10
Vlan-int10
Loop0
Loop0
Loop0
Loop0
Primary link
Backup link
Loop0