Improved L2Vpn Access To L3Vpn Or Ip Backbone - HP FlexNetwork HSR6600 Configuration Manual

Figure 129 Network diagram
In the conventional networking mode, two devices are required to connect the MPLS L2VPN and the
MPLS L3VPN or IP backbone (PE 2 and PE 3 in this example). One (PE 2) is required for terminating
the MPLS L2VPN, and the other (PE 3) is required for accessing the MPLS L3VPN or IP backbone.

Improved L2VPN access to L3VPN or IP backbone

In the improved networking mode, the functions of the two devices that connect the MPLS L2VPN
and the MPLS L3VPN or IP backbone can be implemented on one device. Thus, you can reduce the
number of devices to be deployed, and lower the networking cost and the network deployment
complexity.
As shown in
MPLS L3VPN or IP backbone. PE-agg terminates the MPLS L2VPN and provides access to the
MPLS L3VPN or IP backbone.
Configure the PE-agg as follows so the PE-agg can implement the functions of both PE 2 and PE 3
in Figure 129:
1. Create a terminating virtual Ethernet (VE) interface on the PE-agg to terminate MPLS L2VPN
packets.
This interface is referred to as the VE-L2VPN (L2VE) interface. The functions and
configurations of the interface are similar to those of the terminating interface (Terminating int)
in Figure
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
129. 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 Aggregation (PE-agg) device connects the MPLS L2VPN with the
129.
Figure 129.
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Figure