MPLS VPNs - RD vs RT

Definition

RD - Route Distinguisher

64-bit identifier
Append to an IP address (32-bit) to make a unique 96-bit VPNv4 address

RT - Route Target

64-bit BGP extended community
Defines VPN membership i.e. what routes are part of what VPNs
Applied to VRFs in order to import and export routes

Configuration of RD/RT

RD Configuration

ip vrf <vrf name>
rd 100:1

RT configuration

ip vrf <vrf name>
rd 100:1
route-target import 100:100
route-target export 100:100

Example

Thanks!