are exported and imported into the route targets based on certain matching criteria. These match criteria
include, prefix matches and portocol matches.
You can use the match source-protocol or match ip-address commands to specify matching criteria
for importing or exporting routes between VRFs.
NOTE: You must use the match source-protocol or match ip-address commands in conjunction with the
route-map command to be able to define the match criteria for route leaking.
Consider a scenario where you have created two VRF tables VRF-red and VRF-blue. VRF-red exports routes
with the export_ospfbgp_protocol route-map to VRF-blue. VRF-blue imports these routes into its RTM.
For leaking these routes from VRF-red to VRF-blue, you can use the ip route-export route-map command on
VRF-red (source VRF, that is exporting the routes); you must also specify a match criteria for these routes
using the match source-protocol command. When you leak these routes into VRF-blue, only the routes
(OSPF and BGP) that satisfy the matching criteria defined in route-map export_ospfbgp_protocol are exposed
to VRF-blue.
While importing these routes into VRF-blue, you can further specify match conditions at the import end to
define the filtering criteria based on which the routes are imported into VRF-blue. You can define a route-
map import_ospf_protocol and then specify the match criteria as OSPF using the match source-protocol
ospf command.
You can then use the ip route-import route-map command to import routes matching the filtering criteria
defined in the import_ospf_protocol route-map. For a reply communication, VRF-blue is configured with a
route-export tag. This value is then configured as route-import tag on the VRF-Red.
To configure route leaking using filtering criteria, perform the following steps:
1 Configure VRF-red:
ip vrf vrf-red
interface-type slot/port[/subport]
ip vrf forwarding VRF-red
ip address ip—address mask
A non-default VRF named VRF-red is created and the interface is assigned to this VRF.
2 Define a route-map export_ospfbgp_protocol.
Dell(config)route-map export_ospfbgp_protocol permit 10
3 Define the matching criteria for the exported routes.
Dell(config-route-map)match source-protocol ospf
Dell(config-route-map)match source-protocol bgp
This action specifies that the route-map contains OSPF and BGP as the matching criteria for exporting
routes from vrf-red.
4 Configure the export target in the source VRF with route-map export_ospfbgp_protocol.
ip route-export 1:1 export_ospfbgp_protocol
5 Configure VRF-blue.
ip vrf vrf-blue
Virtual Routing and Forwarding (VRF) 1206
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