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Configuration Guide - VPN 01

NE05E and NE08E V300R003C10SPC500

This is NE05E and NE08E V300R003C10SPC500 Configuration Guide - VPN
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Configuring an L2VPN to Access Multiple L3VPNs Through Sub-interfaces for VLAN Tag Termination

Configuring an L2VPN to Access Multiple L3VPNs Through Sub-interfaces for VLAN Tag Termination

This section describes how to configure an L2VPN to access L3VPNs through the L3VE sub-interface in QinQ or Dot1q termination mode. To be specific, you can configure the L3VE sub-interface to terminate user packets of different inner VLAN tags, and then these packets can be sent to different L3VPNs.

Applicable Environment

As shown in Figure 10-7 and Figure 10-8, different services, such as data, voice, and video, are running on a user network. By adding different VLAN tags to different service packets, sub-interfaces for Dot1q or QinQ VLAN tag termination forward these packets from the L2VPN to different MPLS L3VPNs on the bearer network. In this manner, operators can fully utilize the network resources by allocating different network resources to different services and provide different QoS guarantees for differentiated services.

If an L3VE sub-interface receives single-tagged service data packets from the UPE, configure the L3VE sub-interface as a sub-interface for Dot1q VLAN tag termination to access the L3VPN.

If an L3VE sub-interface receives double-tagged service data packets from the UPE, configure the L3VE sub-interface as a sub-interface for QinQ VLAN tag termination to access the L3VPN.

Figure 10-7 Typical networking of the access of an L2VPN to multiple L3VPNs through sub-interfaces for Dot1q VLAN tag termination

Figure 10-8 Typical networking of the access of an L2VPN to multiple L3VPNs through sub-interfaces for QinQ VLAN tag termination

Pre-configuration Tasks

To configure an L2VPN to access multiple L3VPNs through sub-interfaces for VLAN tag termination, complete the following tasks:

  • Connecting the interfaces and configuring their physical parameters so as to make their physical layer Up

  • Enabling IGP on the MPLS access network to realize IP connectivity

  • Creating VPLS or VLL between UPEs and NPEs

  • Enabling IGP on the MPLS bearer network to realize IP connectivity

  • Configuring the basic functions of L3VPN on NPEs

Configuration Procedures

Figure 10-9 Networking diagram for configuring access the public network or an MPLS L3VPN

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Updated: 2019-01-14

Document ID: EDOC1100058925

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