Specifying a Route Distinguisher

The route distinguisher enables you to establish unique VPN-IPv4 addresses to accommodate the possibility that more than one VPN might use the same IP address from their private address spaces.

rd

• Use to specify a route distinguisher to a VRF.
• You can specify either an AS number or an IP address as the first part of the route distinguisher. Specify some unique integer as the second part.
• You must specify a route distinguisher for a VRF. Otherwise, the VRF will not operate.
• After you have configured the route distinguisher, you can change it only by removing and recreating the VRF.
• Example

  host1:vr1(config-vrf)#rd 100:100

• There is no no version.
• See rd.

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