MULTIPLE SPANNING TREE PROTOCOL NETWORK TOPOLOGY CONVERGENCE METHOD, DEVICE AND SYSTEM

摘要

A multiple spanning tree protocol (MSTP) network topology convergence method is disclosed in the embodiment of the invention. The method comprises: a network device acquires through a target port a Bridge Protocol Data Unit (BPDU) message carrying spanning tree protocol (STP) information and updates the STP information of the target port; the network device compares the common root information contained in the STP information of other reception ports with the common root information contained in the acquired STP information, and compares region root information contained in the STP information of the other reception ports with the region root information contained in the acquired STP information; and the network device updates the external path overhead of those reception ports of the other reception ports found through comparison to be consistent into the overhead indicated by the external path overhead information contained in the acquired STP information. Correspondingly, a network device and a system are also disclosed in the embodiments of the invention. With the embodiments of the invention, invalid BPDU messages can be avoided in an MSTP multi-region networking environment with complicated networks, and thus rapid convergence can be implemented among the network devices.