A Method of Link Layer Discovery Protocol Applied in Synchronous Digital Hierarchy

Abstract

A method for applying a link layer discovery protocol on a synchronous digital hierarchy relates to the field of access network element band inside / outside management channel achievement. The method includes that a local web master disc constructs an LLDP message and inserts a marking field behind the VLAN field; a local SDH line card receives a message transmitted by the local web master disc and removes the marking field and restores to the LLDP message if the marking field is matched with the information of the local SDH line card; HDLC package is conducted after the restored LLDP message is packaged to be of the DCC frame structure, and the structure is mapped to the DCC channel of the SDH plane after twice of package; the far end SDH line car extracts the message of the DCC channel, if the message is the LLDP message, the marking field at the end is added and transmitted to the web master disc, and the far end web master disc processes the LLDP message. The web master information of the LLDP can be transmitted to the far end web element through the SDH plane, the CPU load of the web master is reduced, the message processing speed is improved, and the method is simple and flexible to apply.

Description

technical field [0001] The invention relates to the field of realization of in-band / out-of-band management channels of access network elements, and specifically relates to a method for applying a link layer discovery protocol to a synchronous digital system. Background technique [0002] At present, there are more and more types of access layer network devices and their respective configurations are intricate. In order to enable devices from different manufacturers to discover each other and exchange their own system and configuration information in the network, a standard information exchange platform is required. [0003] LLDP (Link Layer Discovery Protocol, Link Layer Discovery Protocol) is produced under such a background, it provides a standard link layer discovery method, can make the main capabilities of the local device, management address, device identification, interface identification and other information organized into different TLV (Type / Length / Value, type / leng...

AI Technical Summary

Problems solved by technology

For the implementation of network element management on two planes, the existing method is that the network management CPU needs to assemble and parse the LLDP protocol and DCC HDLC data frames separately, the load of the network management CPU is heavy, and the message processing speed is low

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