Create a VRF Instance

About this task

Create a VRF instance to provide a virtual routing interface for a user.

For more information on route scaling, see Release Notes for VOSS.

1. Enter Global Configuration mode:

   enable

   configure terminal

2. Create a VRF instance and specify a VRF name:

   ip vrf WORD<1–16>

3. Configure the maximum number of routes:

   • For IPv4:

     ip vrf WORD<1–16> max-routes <max-routes>

   • For IPv6:

     ip vrf WORD<1–16> ipv6-max-routes <max-routes>

4. Enable max-routes traps:

   • For IPv4:

     ip vrf WORD<1–16> max-routes-trap enable

   • For IPv6:

     ip vrf WORD<1–16> ipv6-max-routes-trap enable

     

     Note

     The maximum number of IPv6 routes for the Global Router are fixed and cannot be changed.

5. Enter VRF Router Configuration mode:

   router vrf WORD<1–16>

6. Configure the IP routing protocol triggers for the VRF:

   Use one of the following commands on your switch:

   • ip bgp

     ip bgp creates both ipv4 and ipv6 instances.

   • ip ospf

     Use ipv6 ospf to create an OSPFv3 instance.

   • ip rip

     RIPng is not virtualized, hence the IPv6 configuration is not applicable here.

   

   Note

   You cannot configure BGP, OSPF, or RIP on a VRF instance unless you first configure the routing protocol trigger.

7. Ensure that the instance is configured correctly:

   show ip vrf WORD<1–16>

Example

Create a VRF instance:

Switch:1>enable
Switch:1#configure terminal
Switch:1(config)#ip vrf vrfRED

Configure the maximum number of IPv4 routes and enable max-routes traps.

Switch:1(config)#ip vrf vrfRED max-routes 12000
Switch:1(config)#ip vrf vrfRED max-routes-trap enable

Enter Router Configuration mode and configure the routing protocol triggers for the VRF:

Switch:1(config)#router vrf vrfRED
Switch:1(router-vrf)#ip bgp 
Switch:1(router-vrf)#ip ospf
Switch:1(router-vrf)#ip rip

To Configure OSPFv3 instance for the VRF:

Switch:1(config)#router vrf vrfRED
Switch:1(router-vrf)#ipv6 ospf

Exit to Global configuration mode:

Switch:1(router-vrf)#exit

Configure the maximum number of IPv6 routes and enable IPv6 max-routes traps.

Switch:1(config)#ip vrf vrfRED ipv6-max-routes 7700
Switch:1(config)#ip vrf vrfRED ipv6-max-routes-trap enable

Ensure that the instance is configured correctly:

Switch:1#show ip vrf vrfRED
=========================================================================================
                                VRF INFORMATION
=========================================================================================
VRF        OSPF       RIP        BGP        PIM        ARP        PIM6        OSPFv3
COUNT      COUNT      COUNT      COUNT      COUNT      COUNT      COUNT       COUNT 
-----------------------------------------------------------------------------------------
1          1          1          1          1          7          1           1

VRF           VRF                                  VLAN    ARP                
NAME          ID   OSPF    RIP     BGP     PIM     COUNT   COUNT   PIM6       OSPFv3
-----------------------------------------------------------------------------------------
vrfRED        3    TRUE    TRUE    TRUE    TRUE    0       7       TRUE       FALSE

1 out of 1 Total Num of VRF Entries displayed.