Connectivity Guide

Enable OSPFv2 in a non-default VRF instance
To enable OSPFv2 in a non-default VRF instance:
1 Create a non-default VRF instance in which you want to enable OSPFv2:
ip vrf vrf-name
2 Enable OSPF and congure an OSPF instance in VRF CONFIGURATION mode.
router ospf instance-number vrf vrf-name
3 Enter the interface information to congure the interface for OSPF in INTERFACE mode.
interface ethernet node/slot/port[:subport]
4 Enable the interface in INTERFACE mode.
no shutdown
5 Disable the default switchport conguration and remove it from an interface or a LAG port in INTERFACE mode.
no switchport
6 Associate the interface with the non-default VRF instance that you created earlier.
ip vrf forwarding vrf-name
7 Assign an IP address to the interface.
ip address ip-address/mask
8 Enable OSPFv2 on the interface.
ip ospf process-id area area-id
• process-id—Enter the OSPFv2 process ID for a specic OSPF process, from 1 to 65535.
• area-id—Enter the OSPFv2 area ID as an IP address (A.B.C.D) or number, from 1 to 65535.
Enable OSPFv2 conguration
OS10(config)# ip vrf vrf-blue
OS10(config-vrf-blue)# router ospf 100 vrf-blue
OS10(conf-router-ospf-100)# exit
OS10(config)# interface ethernet 1/1/2
OS10(conf-if-eth1/1/2)# no shutdown
OS10(conf-if-eth1/1/2)# no switchport
OS10(conf-if-eth1/1/2)# ip vrf forwarding vrf-blue
OS10(conf-if-eth1/1/1)# ip address 11.1.1.1/24
OS10(conf-if-eth1/1/1)# ip ospf 100 area 0.0.0.0
NOTE
:
If you want to move an interface associated with one VRF instance to another default or non-default VRF instance, you must rst
remove the OSPF or Layer3 congurations that already exist on the interface. If you move the interface from one VRF instance to
another without removing these existing Layer3 or OSPF congurations, these congurations do not take eect in the new VRF
instance.
Consider a scenario where the OSPF instance 100 is congured on the default VRF instance and the OSPF instance 200 is congured
on the non-default VRF instance named VRF-Red. The interface eth1/1/1 on the default VRF instance is attached to an OSPF process
100 area 1. In this scenario, if you want to move eth1/1/1 from the default VRF instance to VRF-Red, you must rst remove the OSPF
area conguration to which the interface eth1/1/1 is currently attached to.
Assign router identier
For managing and troubleshooting purposes, you can assign a router ID for the OSPFv2 process. Use the router’s IP address as the router
ID.
• Assign the router ID for the OSPFv2 process in ROUTER-OSPF mode
router-id ip-address
Layer 3
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