LLDP (Link Layer Discovery Protocol) message transmission method and DCB (Data Center Bridging) device

Abstract

The present invention relates to a method for transmitting a Link Layer Discovery Protocol (LLDP) packet carrying an application priority type length value (TLV), and a data center bridging (DCB) device. The method comprises: the DCB device configuring an extended LLDP packet carrying an application priority TLV, and extending, within a field of the application priority TLV, a sequence bit field indicating whether content of an application priority packet is continuous; filling corresponding service data according to the continuity of service data of a current port of the DCB device, and performing a corresponding resetting operation on the sequence bit field; and sending the extended LLDP packet filled with the data to a peer device. By means of optimization, the present invention can greatly shorten the content length of the packet, reduce data transmission, and decrease resource consumption of the CPU.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an LLDP (Link Layer Discovery Protocol) carrying application priority (APPP, Application priority) TLV (Type Length Value, type length value) in lossless Ethernet control transmission. ) message transmission method and DCB equipment. Background technique [0002] The data center is the provider center of enterprise application business services and the center of data calculation, exchange and storage. It combines advanced network technology and storage technology, carries more than 80% of the service requests and data storage capacity in the network, and provides services and operating platforms for the healthy operation of customers' business systems. [0003] In order to integrate enterprise intranet and Ethernet, the concept of enhanced Ethernet is proposed at present. Enhanced Ethernet allows different services to be divided, so as to meet the needs of ordina...

AI Technical Summary

Problems solved by technology

The peer device knows which service packets correspond to which priority by obtaining the configuration of the peer. The structure of the LLDP TLV packet is as follows: figure 1 As shown; because a service message information in LLDP needs to occupy three bytes of the TLV field (such as figure 2 As shown), these service packets are divided according to the port number or protocol type, so there is a problem that the length of the packet occupied by the service division information in the packet is very likely to exceed the maximum length of the packet; in addition, even if Divide only according to the port number, and sometimes it needs to be divided into packets, and the split packets may be as many as hundreds of packets, or even more, which increases the consumption of CPU resources, and may even affect the performance of other services. normal operation

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