Cisco Systems 4500 Configuring VRFs

36-5
Software Configuration Guide—Release 15.0(2)SG
OL-23818-01
Chapter 36 Configuring VRF-lite Configuring VRFs
• Multicast VRF is supported on Supervisor Engine 6-E, Supervisor 6L-E, Catalyst 4900M, and
Catalyst 4948E.
• The capability vrf-lite subcommand under router ospf should be used when configuring OSPF as
the routing protocol between the PE and the CE.
Configuring VRFs
To configure one or more VRFs, perform this task:
Note For complete syntax and usage information for the following commands, see the switch command
reference for this release and see the Cisco IOS Switching Services Command Reference at:
http://www.cisco.com/en/US/docs/ios/ipswitch/command/reference/isw_book.html
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.
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 enters 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. Displays information about the
configured VRFs.
Step 11 Switch# copy running-config
startup-config (Optional) Saves your entries in the configuration file.