Service Manual

tag Enter a tag (export route target) to expose routes to other VRFs. This tag acts as
an identier for exported routes. Use this identier while importing these routes
into another nondefault VRF.
route-map-name (Optional) Enter the name of the route-map to lter the exported routes.
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. As a result, 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.
The following is a list of the Dell Networking OS version history for this command.
Version Description
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.
Virtual Routing and Forwarding (VRF)
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