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Software Configuration Guide—Release 12.2(25)SG
OL-7659-03
Chapter 26 Configuring VRF-lite
Configuring VRFs
Configuring VRFs
To configure one or more VRFs, perform this task:
Note For complete syntax and usage information for the commands, refer to the switch command reference
for this release and the Cisco IOS Switching Services Command Reference for Release 12.2.
Use the no ip vrf vrf-name global configuration command to delete a VRF and to remove all interfaces
from it. Use the no ip vrf forwarding interface configuration command to remove an interface from the
VRF.
Configuring a VPN Routing Session
Routing within the VPN can be configured with any supported routing protocol (RIP, OSPF, or BGP) or
with static routing. The configuration shown here is for OSPF, but the process is the same for other
protocols.
Command Purpose
Step 1
Switch# configure terminal
Enters global configuration mode.
Step 2
Switch(config)# ip routing
Enables IP routing.
Step 3
Switch(config)# ip vrf
vrf-name
Names the VRF, and enter VRF configuration mode.
Step 4
Switch(config-vrf)# rd
route-distinguisher
Creates a VRF table by specifying a route distinguisher.
Enter either an AS number and an arbitrary number
(xxx:y) or an IP address and arbitrary number
(A.B.C.D:y).
Step 5
Switch(config-vrf)# route-target
{export | import | both}
route-target-ext-community
Creates a list of import, export, or import and export route
target communities for the specified VRF. Enter either an
AS system number and an arbitrary number (xxx:y) or an
IP address and an arbitrary number (A.B.C.D:y).
Note This command is effective only if BGP is running.
Step 6
Switch(config-vrf)# import map
route-map
(Optional) Associates a route map with the VRF.
Step 7
Switch(config-vrf)# interface
interface-id
Enters interface configuration mode and specify the Layer
3 interface to be associated with the VRF. The interface
can be a routed port or SVI.
Step 8
Switch(config-if)# ip vrf forwarding
vrf-name
Associates the VRF with the Layer 3 interface.
Step 9
Switch(config-if)# end
Returns to privileged EXEC mode.
Step 10
Switch# show ip vrf [brief | detail |
interfaces
] [
vrf-name
]
Verifies the configuration. Display information about the
configured VRFs.
Step 11
Switch# copy running-config
startup-config
(Optional) Saves your entries in the configuration file.
