Message forwarding method, system and device in H-VPLS (Hierarchical Virtual Private local area network service)

Abstract

The invention provides a message forwarding method, system and device for an H-VPLS (Hierarchical Virtual Private local area network service). A user side operator edge device (UPE) is configured to establish an MAC (media access control) forwarding table by performing MAC address learning only on a message from a local client edge device (CE) side, a network side operator edge device (NPE) is configured to enable a source filtering function to any message in a default mode; after receiving the message from the local CE side, if determining that the message is a unicast message and a destination MAC address of the message cannot be found in the local MAC forwarding table, the UPE only forwards the message to the NPE corresponding to virtual switching instance (VSI) to which the message belongs, and notifies the NPE to close the source filtering function on the massage. The message forwarding method provided by the invention can reduce the redundancy broadcast traffic in the message forwarding process caused by less MAC address space of the UPE.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a message forwarding method, system and device in a layered virtual private local area network. Background technique [0002] The Virtual Private Local Area Network (VPLS) service is a service provided by the Packet Switching Network (PSN). It provides users with dedicated LAN interconnection services through pre-established tunnels and virtual connections in the tunnels. It belongs to the category of Layer 2 VPN. Hierarchical VPLS (H-VPLS) is a hierarchical structure proposed to meet the growth of VPLS service demand. It divides a large MPLS network into multiple VPLS sub-areas to reduce the demand for backbone network tunnels. It has a clear hierarchy and division of labor. Clear features can reduce the complexity of logic and configuration management brought about by the full connection of the operator's edge equipment (PE). [0003] Currently, H-VPLS has two ac...

AI Technical Summary

Problems solved by technology

When the number of actual MAC addresses exceeds the MAC address space of the UPE, MAC addresses cannot be learned. For example, when the MAC address space is limited, the UPE cannot Unknown unicast packets will be broadcast throughout the VSI, including all local CE devices in the VSI and all NPEs in the connected VSI, obviously resulting in a large amount of redundant broadcast traffic

In addition, the UPE side may first learn a large number of non-local CE side user MAC addresses, resulting in full MAC address space, and when the UPE side MAC addresses cannot be learned, the UPE will broadcast unknown unicast packets throughout the VSI. , including all local CE devices and connected NPEs in the VSI, obviously compared with UPE directly forwarding locally, resulting in a large amount of redundant broadcast traffic

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