Method and system for deciding bridge role

Abstract

A method for deciding role of bridge includes configuring current priority level of network device connected to external network, using said network device to send message maintaining bridge role to network device except itself as well as to receive message containing message priority level and sending from the other network device connected to external network, comparing itself current priority level with received message priority level and setting itself to be effective root bridge if itself current priority level is higher or otherwise setting itself to be retired bridge.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method and system for determining bridge roles at the data link layer. Background technique [0002] In the current typical MAN networking scheme, a ring is usually used to connect devices at the aggregation layer. At the same time, BRAS (Broadband Remote Access Sever, Broadband Access Server) is hung on the egress device side of the aggregation layer for user authentication. , address allocation, billing and other operations management, such as figure 1 shown. Among them, the equipment connected to the BRAS at the aggregation layer, as a service aggregation point, also has high requirements on its specifications. The size of a MAC (Media Access Control, Media Access Control) entry is one of the key indicators. However, as the business volume increases, the existing specifications of the equipment will soon be unable to meet its requirements. If the capacity is...

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Problems solved by technology

And if the backup root bridge is upgraded to the root bridge at this time, it cannot connect to the BRAS device because it has no uplink port, then HVRP cannot play its due role, and the existing networking mode does not support HVRP root bridge backup switching Yes, because HVRP does not have the concept of a backup root bridge at this time, it can only change the traffic with the change of the location of the STP / MSTP root bridge

Therefore, although STP / MSTP has a backup root bridge, the switching of the backup root bridge has no effect on HVRP. When the STP / MSTP root bridge fails, all user VLAN service traffic cannot pass through the BRAS to Layer 3 normally, which is equivalent to business interruption

[0009] (3) HVRP in the prior art completely depends on the port roles of blocking protocols such as STP / MSTP and the position of the STP / MSTP root bridge, for starting other link blocking protocols, for example: RRPP (RapidRing Protection Protocol, fast ring network protection protocol), HVRP does not know how to send VLAN registration messages and how to age VLAN messages

Therefore, in the prior art, the coupling between HVRP and blocking protocols such as STP / MSTP is too strong. For other link layer blocking protocols, such as RRPP, it cannot be mixed with it for networking, and the expansion space is too small.

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