Command Reference Guide

80 ● route-distinguisher 3Com Router 5000 Family and Router 6000 Family
Command Reference
route-distinguisher
Purpose Use the route-distinguisher command to configure RD for an MPLS VPN
instance. A vpn-instance cannot run until it is configured with an RD.
Syntax route-distinguisher route-distinguisher
Parameters route-distinguisher
Configures a VPN IPv4 prefix by adding an 8-byte value
to an IPv4 prefix.
Example Configure RD for an MPLS VPN instance.
[3Com ] ip vpn-instance vpn_blue
[3Com -vpn-vpn_blue] route-distinguisher 100:3
[3Com ] ip vpn-instance vpn_red
[3Com -vpn-vpn_red] route-distinguisher 173.13.0.12:200
View This command can be used in the following views:
■ MBGP VPN-Instance view
Description A route distinguisher (RD) creates route and forwarding list for a VPN and specifies
the default route identifier. Add an RD to the beginning of a specific IPv4 prefix to
make it the globally unique VPN IPv4 prefix.
If an RD is associated with an autonomous system number (ASN), it is composed of
the ASN and an arbitrary number; if the RD is associated with an IP address, it is a
combination of the IP address and an arbitrary number.
RD has the following formats:
16-bit ASN (can be 0 here): a 32-bit number defined by user, for example, 101:3.
32-bit IP address (can be 0.0.0.0 here): a 16-bit number defined by user, for example,
192.168.122.15:1.