Configuration Of Bgp And Vrf On Pe Routers - Cisco ASR 903 Manual

Basic MPLS VPN Configuration
In Cisco IOS XE Release 3.9S, echo function is supported. BFD timer on the Cisco ASR 903 router can be as low
as 3.3ms and timer lower than 50ms can be set by using BFD template.
bfd-template single-hop OSPF-BFD
interval min-tx 10 min-rx 10 multiplier 3
interface GigabitEthernet0/1/1
bfd template OSPF-BFD

Configuration of BGP and VRF on PE Routers

Configuration BGP and VRF are the next steps in MPLS VPN deployment. BGP routing is to ensure that VPNv4
routes can be transported across service provider backbone using MP-iBGP. Virtual Routing and
Forwarding(VRF) is to put different customers into separate VRF instances to provide VPN services.
Site
CustomerA Site 1
CustomerB Site 1
CustomerA Site 2
CustomerB Site 2
ASR903-PE1 Configuration
ip vrf CustomerA
rd 100:41
route-target export 100:41
route-target import 100:41
!
ip vrf CustomerB
rd 100:42
route-target export 100:42
route-target import 100:42
router bgp 100
bgp log-neighbor-changes
neighbor 10.10.4.4 remote-as 100
neighbor 10.10.4.4 update-source Loopback10
!
address-family vpnv4
neighbor 10.10.4.4 activate
neighbor 10.10.4.4 send-community extended
OL-30526-01
Multiplier: 3
My Discr.: 1
Min tx interval: 50000
Min Echo interval: 0
Table 2. Routing Protocols used between the CEs and PEs
PE-CE Routing Protocol
OSPF
ISIS
EBGP
OSPF
- Length: 24
- Your Discr.: 1
- Min rx interval: 50000
! created BFD template name OSPF-BFD
! set BFD timer to 10ms
! apply template under the interface
Route Distinguisher and Route Target
100:41
100:42
100:41
100:42
! define vrf CustomerA
! define vrf CustomerB
! VPN neighbor with ASR903-PE2, M-iBGP
Cisco ASR 903 Router Design and Deployment Guide▄
Configuration of BGP and VRF on PE Routers ▀
47