270
AttrID: 0x2 Neighbor: 2.2.2.2
Flags: 0x110060 OrigNextHop: 2.2.2.2
Label: 1146 RealNextHop: 172.1.1.2
BkLabel: 1275 BkNextHop: 172.2.1.3
Tunnel ID: Invalid Interface: Vlan-int11
BkTunnel ID: Invalid BkInterface: Vlan-int12
FtnIndex: 0x0
Configuring MPLS L3VPN FRR through VPNv4 route backup for
an IPv4 route
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 2 to achieve the following purposes:
•
When the link PE 2—CE 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 link between PE 2 and CE 2 fails, traffic from CE 1 to CE 2 goes through
the path CE 1—PE 1—PE 2—PE 3—CE 2.
Figure 73
Network diagram
Table 23
Interface and IP address assignment
Device Interface IP
address
Device
Interface IP
address
CE 1
Loop0
5.5.5.5/32
PE 2
Loop0
2.2.2.2/32
Vlan-int10 10.2.1.1/24
Vlan-int11 172.1.1.2/24
PE 1
Loop0
1.1.1.1/32
Vlan-int13 10.1.1.2/24
Vlan-int10 10.2.1.2/24
Vlan-int15 172.3.1.2/24
Vlan-int11 172.1.1.1/24
PE
3
Loop0
3.3.3.3/32
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
Vlan-int15
Vlan-int15
Loop0
Primary link
Backup link