MPLS VPN Components3. New VPN-IPv4 address family

• New address family which consists of a Route Distinguisher pre-pended to the standard IPv4 route

• Allows routes to be uniquely identified between VPNs

• Allows overlapping addressing between customers, where each customer can use:

  • Registered IP addresses
  • Illegal, unregistered addresses
  • Private addresses (RFC 1918, e.g. 10.x.x.x)

• Neither VPN-IPv4 addresses nor Route Distinguishers are carried in packets, they only relate to VPN routing information

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