Method for determining port role

Abstract

The invention discloses a role-of-port determining method, comprising the steps of: determining a port receives a message and determining the role of the port. And it can make HVRP application range not restricted by MSTP application range any more and make HVRP protocol able to apply to any network environment. Because it determines the role of a port by handshake message of HVRP protocol and it only need take the handshake message completely short time to be sent from the root bridge to the farthest- end HVRP bridge, role calculation of each HVRP bridge port can be synchronized basically, better assuring normal operating of HVRP protocol and raising the speed of determining role of port.

Description

technical field

[0001] The invention relates to virtual local area network technology, in particular to a method for determining port roles. Background technique

[0002] In a typical metropolitan area networking solution in the prior art, the aggregation layer usually uses a ring topology to connect devices. The aggregation layer devices on the aggregation ring network access the core network through the egress device of the aggregation layer. The specific structure is shown in Figure 1. The ring topology shown in FIG. 1 includes a broadband remote access server (BRAS), an aggregation switch 1 , an aggregation switch 2 , an aggregation switch 3 , an aggregation switch 4 , and an aggregation switch 5 . Among them, the aggregation layer egress device is aggregation switch 1, aggregation layer switch 1 is connected to the core network through the BRAS, and aggregation switch 2, aggregation switch 3, aggregation switch 4, and aggregation switch 5 access the external core networ...

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