White Papers

Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S3148.
9.10(0.0) Introduced on the S6100–ON.
9.8(2.0) Introduced on the S3100 series.
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, use the ip route-export tag command
without specifying the route-map attribute. This action exposes source VRF routes to other VRFs, which
then import these routes using the ip route-import tag command.
In Dell EMC Networking OS, you can configure one route-export per VRF as you can only expose one
set of routes for leaking. However, you can configure 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 filter 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 specified filtering options to match BGP, the BGP route is not leaked as that
route is not active in the source VRF.
Related
Commands
● ipv6 route-import – imports IPv6 routes from another VRF.
ipv6 route-import
Imports IPv6 routes that another VRF leaks using the tag that VRF specifies during export of these routes.
Syntax
ipv6 route-import tag [route-map-name]
Parameters
route-import Enter the keywords route-import to import IPv6 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 specified as the export route target at the source VRF.
route-map-name Enter the name of the route-map to filter the imported routes.
NOTE: Use the route-map attribute while importing routes from the global
RTM. Route-maps allow you to filter routes at the import end based on the
matching criteria that you define in the route-map.
Defaults N/A
Command Modes
● VRF mode
● CONFIGURATION mode
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S3148.
1556 Virtual Routing and Forwarding (VRF)