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Method for realizing multiple spanning tree software simulation

A technology of software simulation and implementation method, applied in the field of communication, can solve the problem that ASIC chip cannot support MSTP and so on

Inactive Publication Date: 2006-09-06
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for implementing multiple spanning tree software simulatio

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  • Method for realizing multiple spanning tree software simulation
  • Method for realizing multiple spanning tree software simulation
  • Method for realizing multiple spanning tree software simulation

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Embodiment Construction

[0021] The present invention uses software simulation to realize the basic idea of ​​running MSTP on a chip that supports STP. If a certain VLAN does not exist on a port, the port is not allowed to send and receive messages of the VLAN, and filters out messages from the corresponding port of another switch. The incoming packet of the VLAN. Whether the chip is allowed to send and receive the VLAN message is related to the message type, whether it is TAG (tagged), whether the port exists in the VLAN, MAC configuration, and so on. The upper layer still operates according to the standard protocol, and the task to be completed by the bottom layer simulation is to meet several requirements of the protocol:

[0022] 1. The essence of software simulation is realized by adding and deleting ports in a VLAN. Specifically: in the environment where packets of different VLANs are forwarded on different spanning trees, when the Multiple Spanning Tree Protocol calculates that a port of a swit...

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Abstract

The present invention discloses a multiple tree generation software simulation implementation method, through software simulation solving current ethernet switchboard ASIC chip unable supporting MSTP problem. Said method includes under transmitting different VLANs message on different generation tree condition, when multiple generation tree protocol calculating one switchboard port to some VLAN being non-transmitting state, sublayer software deleting said port from said VLAN, simultaneously filtering said VLAN message from another switchboard corresponded port, if transmitting message link gone wrong then through MSTP protocol converging, to make said switchboard state becoming transmitting state on said port, at this point sublayer software adding said port in said VLAN, simultaneously canceling message filtering. The present invention increases new property for current network products through software mode.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for simulating multiple spanning trees through software inside a network communication device that only supports Spanning Tree Protocol (STP). Background technique [0002] STP (Spanning Tree Protocol) is an important protocol for Layer 2 network applications. Its purpose is to prevent broadcast storms caused by ring structures in the network and ensure reliable availability of the network. In the network where STP is running, it can effectively block the network loop, ensure the logical non-ring structure of the network, and at the same time make the blocked link a backup link. When a fault occurs on the ring, the blocked link Normal operation can be resumed quickly. However, since all VLANs (Virtual Local Area Networks) in the STP protocol share one spanning tree, VLAN load balancing cannot be achieved. When the traffic on the network is too large, packets of a ...

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Application Information

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IPC IPC(8): H04L29/06H04L12/56H04L12/931
Inventor 刘新民
Owner NEW H3C TECH CO LTD
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