Administrator Guide

The VRF ID range is from 1 to 511. 0 is the default VRF ID.
Assigning an Interface to a VRF
You must enter the ip vrf forwarding command before you configure the IP address or any other setting on an interface.
NOTE: You can configure an IP address or subnet on a physical or VLAN interface that overlaps the same IP address or
subnet configured on another interface only if the interfaces are assigned to different VRFs. If two interfaces are
assigned to the same VRF, you cannot configure overlapping IP subnets or the same IP address on them.
• Assign an interface to a VRF instance.
INTERFACE
ip vrf forwarding vrf-name
Assigning a Front-end Port to a Management VRF
Starting in 9.7(0.0) release, you can assign a front-end port to a management VRF and make the port to act as a host interface.
NOTE: You cannot assign loop-back and port-channel interfaces to a management port.
To assign a front-end port to a management VRF, perform the following steps:
1. Enter the front-end interface that you want to assign to a management interface.
CONFIGURATION
interface gigabitethernet 1/1
2. Assign the interface to management VRF.
INTERFACE CONFIGURATION
ip vrf forwarding management
Before assigning a front-end port to a management VRF, ensure that no IP address is configured on the interface.
3. Assign an IPv4 address to the interface.
INTERFACE CONFIGURATION
ip address 10.1.1.1/24
Before assigning a front-end port to a management VRF, ensure that no IP address is configured on the interface.
4. Assign an IPv6 address to the interface.
INTERFACE CONFIGURATION
ipv6 address 1::1
You can also auto configure an IPv6 address using the ipv6 address autoconfig command.
View VRF Instance Information
To display information about VRF configuration, enter the show ip vrf command. To display information on all VRF instances
(including the default VRF 0), do not enter a value for vrf-name.
• Display the interfaces assigned to a VRF instance.
EXEC
show ip vrf [vrf-name]
Assigning an OSPF Process to a VRF Instance
OSPF routes are supported on all VRF instances. See the Open Shortest Path First (OSPFv2) chapter for complete OSPF configuration
information.
Assign an OSPF process to a VRF instance . Return to CONFIGURATION mode to enable the OSPF process. The OSPF Process ID is the
identifying number assigned to the OSPF process, and the Router ID is the IP address associated with the OSPF process.
Once the OSPF process and the VRF are tied together, the OSPF Process ID cannot be used again in the system.
• Enable the OSPFv2 process globally for a VRF instance. Enter the VRF key word and instance name to tie the OSPF instance to the
VRF. All network commands under this OSPF instance are subsequently tied to the VRF instance.
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Virtual Routing and Forwarding (VRF)