HP HPE FlexNetwork MSR Router Series, Руководство по настройке

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2. Create an access VE interface on the PE-agg to provide access to the backbone, and configure
the interface and the L2VE interface have the same interface number.
This interface is referred to as the VE-L3VPN (L3VE) interface. The functions and
configurations of the interface are similar to those of the access interface (Access int) in
Figure
130 . The IP address of the L3VE interface must be in the same network segment as the AC
interface of CE 1. When the backbone is an MPLS L3VPN, bind the VPN instance to the L3VE
interface. The interface can then forward user packets through the VPN routes.
The L2VE interface directly delivers the obtained Layer 2 packets to the L3VE interface. The two VE
interfaces can be considered directly connected through a physical link, like the physical link
between the L2VE interface and the L3VE interface in
Figure 130 .
The PE-agg connects the MPLS L2VPN and the backbone through the L2VE interface and the L3VE
interface. You can assume that the MPLS L2VPN is connected to the backbone through an Ethernet
or VLAN link. If a user is not connected to the MPLS L2VPN through Ethernet or VLAN, you must
configure MPLS L2VPN interworking on the user access PE (PE 1) and the L2VE interface of the
PE-agg.
Configuring conventional L2VPN access to
L3VPN or IP backbone
As shown in Figure 130 , perform the following tasks to configure conventional L2VPN access to
L3VPN or IP backbone:
1. Configure the MPLS L2VPN:
{
Configure PE 1 and PE 2 as PE devices in the MPLS L2VPN.
{
Configure CE 1 and PE 3 as CE devices in the MPLS L2VPN.
For more information about MPLS L2VPN configuration, see " Configuring MPLS L2VPN " and
" Configuring VPLS ."
2. Configure the MPLS L3VPN or IP backbone:
{
Configure PE 3 and PE 4 as PE devices in the MPLS L3VPN or IP backbone.
{
Configure CE 1 and CE 2 as CE devices in the MPLS L3VPN or IP backbone.
For more information about MPLS L3VPN configuration, see " Configuring MPLS L3VPN ."
Configuring improved L2VPN access to L3VPN or
IP backbone
As shown in Figure 131 , configurations required on PE 1, PE 4, CE 1, and CE 2 are similar to those
on the devices in the conventional L2VPN access scenario. The PE-agg requires the following
configurations:
•
Create an L2VE interface and an L3VE interface that have the same interface number.
•
Configure MPLS L2VPN. For more information, see " Configuring MPLS L2VPN " and
" Configuring VPLS ."
•
Configure MPLS L3VPN or IP routes. For more information about MPLS L3VPN configuration,
see "
Configuring MPLS L3VPN ."