Determine If Fib Is Enabled In The Core; Configure Multiprotocol Bgp On The Pe Routers And Route Reflectors - Cisco NCS 540 Series Configuration Manual

Determine if FIB is Enabled in the Core

Related Topics
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For more details on configuring MPLS LDP, see the Implementing MPLS Label Distribution Protocol chapter
in the MPLS Configuration Guide for Cisco NCS 540 Series Routers.
Determine if FIB is Enabled in the Core
Forwarding Information Base (FIB) must be enabled on all routers in the core, including the provider edge
(PE) routers. For information on how to determine if FIB is enabled, see the Implementing Cisco Express
Forwarding module in the IP Addresses and Services Configuration Guide for Cisco NCS 540 Series Routers.

Configure Multiprotocol BGP on the PE Routers and Route Reflectors

Multiprotocol BGP (MP-BGP) propagates VRF reachability information to all members of a VPN community.
You must configure MP-BGP peering in all the PE routers within a VPN community.
Figure 6: Multiprotocol BGP on PE Routers
Configuration Example
This example shows how to configure MP-BGP on PE1. The loopback address (20.20.20.1) of PE2 is specified
as the neighbor of PE1. Similarly, you must perform this configuration on PE2 node as well, with the loopback
address (13.13.13.1) of PE1 specified as the neighbor of PE2.
Router-PE1#configure
Router-PE1(config)#router bgp 2001
Router-PE1(config-bgp)#bgp router-id 13.13.13.1
Router-PE1(config-bgp)#address-family ipv4 unicast
Router-PE1(config-bgp-af)#exit
Router-PE1(config-bgp)#address-family vpnv4 unicast
Router-PE1(config-bgp-af)#exit
Router-PE1(config-bgp)#neighbor 20.20.20.1
Router-PE1(config-bgp-nbr)#remote-as 2001
Router-PE1(config-bgp-nbr)#update-source loopback 0
Router-PE1(config-bgp-nbr)#address-family ipv4 unicast
Router-PE1(config-bgp-nbr-af)#exit
Router-PE1(config-bgp-nbr)#address-family vpnv4 unicast
Router-PE1(config-bgp-nbr-af)#exit
Router-PE1(config-bgp-nbr)#exit
/* VRF configuration */
Router(config-bgp)# vrf vrf1601
Router-PE1(config-bgp-vrf)#rd 2001:1601
Router-PE1(config-bgp-vrf)#address-family ipv4 unicast
Router-PE1(config-bgp-vrf-af)#label mode per-vrf
L3VPN Configuration Guide for Cisco NCS 540 Series Routers, IOS XR Release 6.3.x
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178.0.0.1 192.1.1.1
IPv6: (0)
How to Implement MPLS Layer 3 VPNs, on page 8
MPLS L3VPN Overview