Users Guide

You can leak global routes to VRFs. As the global RTM usually contains a large pool of
routes, when the destination VRF imports global routes, these routes are duplicated into
the VRF's RTM. It is mandatory to use route-maps to lter out leaked routes while sharing
global routes with VRFs.
Command Modes
• VRP mode
• CONFIGURATION mode
Command History
This guide is platform-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.10(0.0) Introduced on the S6100–ON.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S4810, S4820T, S5000, S6000, S6000–ON, and Z9500.
Usage Information To export all the routes corresponding to a source VRF, you can use the ip route-export tag command
without specifying the route-map attribute. This action exposes source VRF routes to various other VRFs, which
then import these routes using the ip route-import tag command.
In Dell Networking OS, you can congure one route-export per VRF as you can only expose one set of routes for
leaking. However, you can congure multiple route-import targets because a VRF can accept routes from multiple
VRFs.
You can expose a unique set of routes from the source VRF for leaking to other VRFs. When two VRFs leak or
export routes, there is no option to discretely lter leaked routes from each source VRF. For example, you cannot
import one set of routes from one VRF and another set of routes from another VRF.
Only active routes are eligible for leaking. For example, if one VRF has two routes corresponding to BGP and OSPF,
in which the BGP route is not active, the OSPF route takes precedence over BGP. Even though the target VRF
has specied ltering options to match BGP, the BGP route is not leaked as that route is not active in the Source
VRF.
Related Commands
• ip route-import — imports routes from another VRF.
ip route-import
Imports IPv4 routes that another VRF leaks using the VRF tag during the export of these routes.
Syntax
ip route-import tag [route-map—name]
Parameters
route-import Enter the keywords route-import to import routes into the VRF.
tag Enter a tag (ASN number) to specify an import route target for importing routes from
another VRF.
To import leaked routes from another VRF, use the same ASN number that is specied as
the export route target at the source VRF.
1556 Virtual Routing and Forwarding (VRF)