Method for learning MAC address and system and equipment for conveying VPLS client data

Abstract

The invention discloses a method of studying MAC address. A root network device issues data message to leaf PE, wherein the said data message at least comprises customer data and a label for marking the VPLS of the customer data and entry PE. The said customer data at least has customer source MAC address. The leaf PE obtains the VPLS and entry PE based on the label in the data message. When the leaf PE is not the entry PE, and CE connected with the leaf PE belongs to the said VPLS, the leaf PE obtains a phantom line to the entry PE, and the mapping relation between the said phantom line and customer source MAC address is stored. The invention also provides a system and device for transmitting the VPLS customer data. When the VPLS customer data is transmitted using multicast tree, MAC address studying is performed on the leaf PE, and the customer border device is ensured not to receive two same customer data packages.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a method for learning MAC addresses and a system and equipment for transmitting VPLS client data. Background technique [0002] VPLS (Virtual Private LAN Service, virtual private LAN service) provides a point-to-multipoint layer-2 virtual private network L2VPN service, enabling geographically isolated user sites to be connected through a wide area network WAN or / and a metropolitan area network MAN, and enabling The connection effect of each site is the same as in a local area network LAN. [0003] Each customer edge equipment CE of the same VPLS network is connected through the service provider network, and the service provider network is composed of multiple service provider network internal equipment P and service provider network edge equipment PE. The VPLS network connection is shown in Figure 1, which mainly consists of the following components: [0004] Access circuit: C...

AI Technical Summary

Problems solved by technology

The above method can only get the VPLS to which the customer data belongs from the label in the data packet, without the identification of the ingress PE, so the egress PE cannot learn the MAC address when receiving traffic from the multicast tree, and cannot obtain the VPLS to which the source MAC address of the customer belongs. The pseudowire of the ingress PE will cause all VPLS traffic to be transmitted using the multicast tree instead of the pseudowire

For example, if a multicast tree is used to transmit VPLS traffic, the MAC address table on the leaf PE is empty at the beginning. Since the leaf PE cannot learn the MAC address when receiving VPLS traffic, the MAC address table is always empty, so all VPLS traffic It must be transmitted through the multicast tree instead of the pseudowire, so that the unicast traffic will always be transmitted to the unnecessary leaf PE, and the leaf PE will forward the customer data to the corresponding CE, which wastes bandwidth resources and aggravates the Leaf PE has to deal with the burden

[0019] 2. When using a multicast tree to transmit VPLS traffic, when the leaf PE is the ingress PE, it will receive the data packet sent by the root of the tree, because there is no information identifying the ingress PE in the data packet, and the ingress PE does not know it is itself The customer data sent to the root of the tree will also be forwarded to the corresponding CE. In this way, the CE that uploaded the customer data will receive two copies of the same customer data, that is, the customer data sent by the customer site and the data sent by the root of the multicast tree. Customer data will increase the burden on CE and may cause errors in upper-layer applications

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