3Com 3C13636 Configuration Manual page 881

3Com Router 3000 Ethernet Family
Configuration Guide
The VPN instance is associated with the site. The VPN membership and routing rules
of a site is configured in the corresponding VPN instance.
This command is used to establish a new vpn-instance or enter the existing
vpn-instance view. To delete a certain vpn-instance, use the no form of this command.
If this vpn-instance already exists, then directly enter the view of this vpn-instance to
perform the corresponding configurations.
Perform the following configurations in the system view.
Table 3-2 Create and enter vpn-instance view
Establish and enter vpn-instance view
Delete vpn-instance
By default, no vpn-instance is defined.
2) Configure RD for VPN instance
After PE router is configured with RD, MP-BGP attaches the RD behind IPv4 when
BGP is redistributed at a VPN route learned at the CE. Then the general IPv4 address
is turned into a globally unique VPN IPv4 address.
Perform the following configuration in the vpn-instance view.
Table 3-3 Configure RD for VPN instance
Configure RD for VPN instance
Here the parameter is required and no default value is set.
Other parameters for VPN instance cannot be configured before configuring RD for it.
3) Configure vpn-instance description
Perform the following configuration in vpn-instance view to configure vpn-instance
description.
Table 3-4 Configure vpn-instance description
Configure vpn-instance description
Delete vpn-instance description
4) Configure vpn-target attribute for vpn-instance
Operation
Operation
Operation
3Com Corporation
3-19
Chapter 3 BGP/MPLS VPN Configuration
Command
ip vpn-instance vpn-instance_name
undo ip
vpn-instance_name
Command
route-distinguisher route-distinguisher
Command
description vpn-instance-description
undo description
vpn-instance