interface-type slot/port[/subport]
ip vrf forwarding VRF-blue
ip address ip—address mask
A non-default VRF named VRF-blue is created and the interface 1/22 is assigned to it.
6 Define the route-map import_ospf_protocol.
Dell(config)route-map import_ospf_protocol permit 10
7 Define the matching criteria for importing routes into VRF-blue.
Dell(config-route-map)match source-protocol ospf
This action specifies that the route-map contains OSPF as the matching criteria for importing routes into
vrf-blue.
8 Configure the import target in VRF-blue with route-map import_ospf_protociol.
ip route-import 1:1 import_ospf_protocol
When you import routes into VRF-blue using the route-map import_ospf_protocol, only OSPF routes
are imported into VRF-blue. Even though VRF-red has leaked both OSPF as well as BGP routes to be
shared with other VRFs, this command imports only OSPF routes into VRF-blue.
9 Configure the import target in the source VRF for reverse communnication with the destination VRF.
ip route-import 2:2
The show run output for the above configuration is as follows:
ip vrf vrf-Red
ip route-export 1:1 export_ospfbgp_protocol
ip route-import 2:2
! this action exports only the OSPF and BGP routes to other VRFs
!
ip vrf vrf-Blue
ip route-export 2:2
ip route-import 1:1 import_ospf_protocol
!this action accepts only OSPF routes from VRF-red even though both OSPF as well
as BGP routes are shared
The show VRF commands displays the following output:
Dell# show ip route vrf VRF-Blue
C 122.2.2.0/24 Direct, Te 1/22 0/0 22:39:61
O 22.2.2.2/32 via 122.2.2.2 110/0
00:00:11
O 44.4.4.4/32 via vrf-red:144.4.4.4 0/0 00:32:36
<< only OSPF and BGP leaked from VRF-red
Important Points to Remember
• Only Active routes are eligible for leaking. For example, if VRF-A has two routes from BGP and OSPF, in
which the BGP route is not active. In this scenario, the OSPF route takes precedence over BGP. Even
though the Target VRF-B has specified filtering options to match BGP, the BGP route is not leaked as
that route is not active in the Source VRF.
• The export-target and import-target support only the match protocol and match prefix-list options.
Other options that are configured in the route-maps are ignored.
• You can expose a unique set of routes from the Source VRF for Leaking to other VRFs. For example, in
VRF-red there is no option for exporting one set of routes (for example, OSPF) to VRF- blue and another
Virtual Routing and Forwarding (VRF) 1207
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