Cisco NCS 540 Series User Manual

• How many customers to be supported?
• How many VPNs are required for each customer?
• How many virtual routing and forwarding (VRF) instances are there for each VPN?
• Determine the routing protocols required in the core.
• Determine if BGP load sharing and redundant paths in the MPLS VPN core are required.
Configure Routing Protocols in the Core
You can use RIP, OSPF or IS-IS as the routing protocol in the core.
Figure 5: OSPF as Routing Protocol in the Core
Configuration Example
This example lists the steps to configure OSPF as the routing protocol in the core.
Router-PE1#configure
Router-PE1(config)#router ospf dc-core
Router-PE1(config-ospf)#address-family ipv4 unicast
Router-PE1(config-ospf)#area 1
Router-PE1(config-ospf-ar)#interface HundredGigE0/0/1/0
Router-PE1(config-ospf-vrf-ar-if)#commit
Running Configuration
router ospf dc-core
router-id 13.13.13.1
address-family ipv4 unicast
area 1
interface HundredGigE0/0/1/0
!
!
!
Verification
• Verify the OSPF neighbor and ensure that the State is displayed as 'FULL'.
Router-PE1# show ospf neighbor
Neighbors for OSPF dc-core
Neighbor ID Pri State Dead Time Address Interface
16.16.16.1 1 FULL/DR 00:00:34 191.22.1.2 HundredGigE0/0/1/0
Neighbor is up for 1d18h
Total neighbor count: 1
L3VPN Configuration Guide for Cisco NCS 540 Series Routers, IOS XR Release 6.3.x
10
MPLS L3VPN Overview
Configure Routing Protocols in the Core

Cisco NCS 540 Series Specifications

General

Brand	Cisco
Model	NCS 540 Series
Category	Network Router
Language	English