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OSN 9800 V100 Configuration Guide 03

This document introduces service configuration process for OSN 9800.
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Service Carrier Technologies

Service Carrier Technologies

The product support Ethernet service carrier technologies such as port carrier (physical isolation), VLAN, and multi-protocol label switching (MPLS). The VLAN technology includes QinQ technology. This section describes the MPLS and QinQ technologies, which are more complex.


MPLS is a type of transmission technology and it is used to transparently transmit data packets between users. The MPLS technology includes pseudo wire edge to edge emulation (PWE3) and MPLS tunnel.

  • PWE3

    PWE3 is a type of L2VPN protocol. In a packet switched network (PSN), PWE3 provides tunnels and emulates various services, for example, Ethernet services. PWE3 carries services that are received over different mediums on one MPLS network, eliminating the need for constructing multiple networks and therefore reducing the OPEX.

    PWE3 creates point-to-point tunnels, which are separated from each other. The Layer 2 packets from users are transparently transmitted in PWs. PWs must be carried on the MPLS Tunnel.

    Figure 3-6 Application of PWE3

  • MPLS Tunnel
    The MPLS tunnel is defined by the MPLS protocol. Independent from services, the MPLS tunnel implements end-to-end transmission and carries PWs that contain the services. Figure 3-7 shows how the MPLS tunnel is used to transmit services.
    Figure 3-7 Application of the MPLS tunnel


Services from the user side are carried by the QinQ link on the network side. Multiple VLANs of the user network are encapsulated in QinQ mode into one VLAN in the transport network. In this way, the VLAN resources in the transport network are saved. The QinQ technology is a VLAN stacking and nesting technology. Using the QinQ technology, data packets carry two layers of VLAN tags for the identification purpose. This removes the limit of the original solution in which only one layer of VLAN tag is used, extending the VLAN IDs. Figure 3-8 shows the application of the QinQ technology.
Figure 3-8 Application of the QinQ technology
Updated: 2019-09-05

Document ID: EDOC1100033663

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