Method and equipment for link aggregation

Abstract

The disclosure discloses a method and a device for link aggregation. The method includes: turning off data frame transmitting-receiving functions of all ports; when a timer of a Transmit machine expires, a Selection Logic machine selects a TRUNK for a port, a timer of a Mux machine is set and started, and the Mux machine prepares to add the port to the selected TRUNK; and when the timer of the Mux machine and the timer of the Transmit machine expire simultaneously, the Mux machine adds the port to the selected TRUNK, turns on the data frame transmitting-receiving function of the port according to aggregation state information in a received LACPDU message, and performs application message transmission. The method and the device of the present disclosure ensure simultaneous turning-on of the data frame transmitting-receiving function by properly setting the timer duration of each state machine, thereby reducing application message loss; in case an abnormality occurs at an aggregated link, the data frame transmitting-receiving function is turned off timely, increasing reliability of application message transmission by the aggregated link.

Description

technical field [0001] The present invention relates to the field of network communication, in particular to a link aggregation method and equipment. Background technique [0002] Link Aggregation Control Protocol (Link Aggregation Control Protocol, LACP) is a protocol to achieve dynamic link aggregation. LACP aggregates one or more links together to form a link aggregation group (TRUNK), so that media access The control (MAC) application layer can treat the link aggregation group as a single link. After a link is added to a link aggregation group, application packets can be transmitted only after the data frame sending and receiving functions of the ports at both ends of the aggregation link in the link aggregation group are enabled, otherwise, the application packets will be lost . [0003] There are six state machines in LACP: Receive machine, Periodic Transmission machine, Selection Logic machine, Mux machine, Transmit machine ) and the Churn Detection machine. Usual...

AI Technical Summary

Problems solved by technology

Therefore, if the timer of the sending state machine has not expired, the port status information of the local port cannot be notified to the peer port in time, so that the data frame sending and receiving functions cannot be enabled at the same time, and it is easy to cause the loss of application messages.

[0008] However, the durations of the respective timers of the above four state machines with timers are not clearly given in LACP, and the relationship between them is uncertain. Currently, in the process of link aggregation control using LACP, each timing The timer duration is set by using the experience value or by the user; when the user sets the timer, often due to unreasonable settings, the state information of the port at one end of the aggregation link cannot be notified to the other end in time, causing the data frame The sending and receiving functions cannot be turned on at the same time, resulting in the loss of application messages during transmission

Images