H3C S6550X-HI Series Command Reference Manual page 2112

Syntax
route-distinguisher route-distinguisher
undo route-distinguisher
Default
No RD is specified.
Views
VPN instance view
VPN instance IPv4 address family view
VPN instance IPv6 address family view
Predefined user roles
network-admin
Parameters
route-distinguisher
one of the following formats:
•
16-bit AS number:32-bit user-defined number. For example, 101:3.
•
32-bit IP address:16-bit user-defined number. For example, 192.168.122.15:1.
•
32-bit AS number:16-bit user-defined number, where the minimum value of the AS number is
65536. For example, 65536:1.
Usage guidelines
RDs enable VPNs to use the same address space. An RD and an IPv4 prefix form a unique
VPN-IPv4 prefix.
If you configure an RD for a VPN instance, all address families in the VPN instance must use the
same RD as the VPN instance.
If you do not configure an RD for a VPN instance, address families in the VPN instance can use
different RDs.
To configure an RD for a VPN instance, make sure either of the following conditions exists:
•
No RDs have been configured for address families in the VPN instance.
In this case, the RD of the VPN instance will be synchronized to all address families in the VPN
instance.
•
All address families in the VPN instance use the same RD.
In this case, you must configure the same RD as the address families for the VPN instance.
When you remove the RD from an address family, the RD will also be removed from the VPN
instance of the address family.
To guarantee global uniqueness for a VPN-IPv4 address, do not set the AS number or IP address in
an RD to any private AS number or private IP address.
To modify an RD, execute the
then execute the
Examples
# Configure RD 22:1 for VPN instance vpn1.
<Sysname> system-view
[Sysname] ip vpn-instance vpn1
[Sysname-vpn-instance-vpn1] route-distinguisher 22:1
: Specifies an RD for the VPN instance, a string of 3 to 21 characters in
undo route-distinguisher
route-distinguisher
command.
7
command to remove the RD and