Reference Guide

You can configure an IP subnet or address on a physical or VLAN interface that overlaps the same IP
subnet or address configured on another interface only if the interfaces are assigned to different VRFs. If
two interfaces are assigned to the same VRF, you cannot configure overlapping IP subnets or the same IP
address on them.
Example
Dell#configure terminal
Dell(conf)#ip vrf red
Dell(conf-vrf)#description "Red Network"
Dell(conf-vrf)#show config
!
ip vrf red 4
description "Red Network"
Dell(conf-vrf)#
Dell(conf-if-te-1/45)#int te 7/46
Dell(conf-if-te-1/46)#no shut
Dell(conf-if-te-1/46)#ip vrf forwarding red
Dell(conf-if-te-1/46)#ip add 100.1.1.1/24
Dell(conf-if-te-1/46)#
Dell(conf-if-te-1/46)#
Dell(conf-if-te-1/46)#
Dell(conf-if-te-1/46)#show config
!
interface TenGigabitEthernet 1/46
ip vrf forwarding red
ip address 100.1.1.1/24
no shutdown
Dell(conf-if-te-1/46)#
ip route-export
Enables route leaking between VRFs. Exports or shares IPv4 routes corresponding to one VRF with other non-default VRFs.
Syntax
ip route-export tag [route-map-name]
Parameters
route-export Enter the keyword to leak or share routes between VRFs.
tag Enter a tag (export route target) to expose routes to other VRFs. This tag acts as
an identifier for exported routes. You can use this identifier while importing these
routes into another non-default VRF.
route-map-name (Optional) Enter the name of the route-map to filter the exported routes.
You can leak global routes to be made available to VRFs. As the global RTM usually
contains a large pool of routes, when the destination VRF imports global routes,
these routes will be duplicated into the VRF's RTM. As a result, it is mandatory to
use route-maps to filter out leaked routes while sharing global routes with VRFs.
Defaults N/A
Command Modes VRF MODE
CONFIGURATION
Command
History
Version Description
9.7(0.0) Introduced on the S4810, S4820T, S5000, S6000, S6000–ON, and Z9500.
Usage
Information
You can use the ip route-export tag command without specifying the route-map attribute to export all the
routes corresponding to a source VRF. This action exposes source VRF's routes to various other VRFs,
which then import these routes using the ip route-import tag command. In Dell Networking OS, you can
configure at most one route-export per VRF as only one set of routes can be exposed for leaking.
However, you can configure multiple route-import targets because a VRF can accept routes from multiple
VRFs.
Virtual Routing and Forwarding (VRF) 1387