Configuring Basic Mpls L3Vpn; Configuring A Vpn Instance - 3Com S7906E Configuration Manual

To do...
Enter system view
Enter VPN instance view
Associate a tunneling policy
with the VPN instance
Create the tunneling policy before associating it with the VPN instance. Otherwise, the default policy will
be used.

Configuring Basic MPLS L3VPN

This section describes how to configure a simple MPLS L3VPN, where only one carrier is involved, the
MPLS backbone is not inter-provider, and none of the PEs or CEs functions as a PE and a CE at the
same time.
Some special MPLS L3VPN networking scenarios such as HoVPN, multi-role host, and inter-provider
VPN require additional configurations. For more information, refer to the related sections in this chapter.
In configuring MPLS L3VPN, the key task is to manage the advertisement of VPN routes on the MPLS
backbone and includes the management of route advertisement between PEs and CEs and that
between PEs.
As for the route exchange between a PE and a CE, you can configure static routes, multiple RIP
instances, multiple OSPF instances, multiple IS-IS instances, or BGP according to the networking
situations. MP-IBGP is adopted between PEs.
Configuration Prerequisites
Before configuring basic MPLS L3VPN, complete these tasks:
Configure IGP for the MPLS backbone (PEs and Ps) to achieve IP connectivity
Configure MPLS basic capability for the MPLS backbone (PEs and Ps)
Configure MPLS LDP for the MPLS backbone (PEs and Ps) so that LDP LSPs can be established
On CEs, configure the IP addresses of the interfaces for accessing the PEs

Configuring a VPN Instance

Follow these steps to configure a VPN instance:
To do...
Enter system view
Use the command...
system-view
ip vpn-instance
vpn-instance-name
tnl-policy tunnel-policy-name
Use the command...
system-view
1-26
Remarks
—
Required
Required
By default, the LSP tunnel is
used and the number of tunnels
for load balancing is 1.
Remarks
—