Method, system and controlling bridge for obtaining port extension topology information

摘要

A method, system and controlling bridge (CB) for acquiring port extension (PE) topology information, and a method and system for processing an upstream port, wherein, the method for acquiring the port extension (PE) topology information includes: a CB receiving a link layer discovery protocol (LLDP) message sent by the PE, and perceiving an attachment of the PE; the CB receiving Extended Port Create message sent by the PE, and instantiating corresponding instantiated ports inside the CB. By adopting the above-mentioned technical scheme, the topology information of the PE connected to the CB can be obtained and a channel for forwarding data can be established, effectively.

主权项

1. A method for acquiring port extension (PE) topology information by a controlling bridge (CB), comprising:
receiving, by the CB, a link layer discovery protocol (LLDP) message sent by the PE and perceiving an attachment of the PE; and receiving, by the CB, Extended Port Create message sent by the PE; acquiring, by the CB, extended port of the PE; instantiating, by the CB, instantiated ports corresponding to the extended ports one by one inside the CB; and establishing, by the CB, a channel between the instantiated port and the extended port corresponding to the instantiated port; sending, by the CB, LLDP messages through ports to the PE, wherein the LLDP messages sent by the CB through the ports to the PE carry cascade port priorities assigned by the CB to the ports respectively; and then the PE determining a port in the ports as an upstream port according to the received LLDP messages sent by the CB; reconfiguring, by the PE, tag information on a previous upstream port onto the determined upstream port, and sending an LLDP message and extended port message through the determined upstream port.