Bandwidth control method and system
A bandwidth control and bandwidth technology, applied in the field of network communication, which can solve the problems of data frame loss, VOQ congestion, and inability to guarantee the QoS of data exchange services, and achieve the effect of avoiding data frame loss and ensuring QoS.
Active Publication Date: 2008-09-24
NEW H3C TECH CO LTD
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[0005] However, the switching network device using this non-fixed-length switching method only has the function of data exchange, does not have the scheduling function, and cannot adjust the transmission bandwidth of the data frame sent by each VOQ to the FU. Therefore, when a data frame occurs in the cache of the switching network device When frames are congested or overflowed, data frames may be lost, and the QoS of data exchange services cannot be guaranteed
For example, when the transmission bandwidth of the data frame sent from the FAU to the FU is too small, causing VOQ congestion, or when the transmission bandwidth of the data frame sent from the FAU to the FU is too large, causing the FU buffer to overflow, etc., will cause the loss of the data frame
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[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0028] The method provided by the present invention mainly includes: acquiring the cache state information of the switching network device; when it is determined according to the cache state information that data frame congestion or overflow occurs in the cache of the switching network device, adjusting The data frame sending bandwidth used.
[0029] Wherein, the method may acquire one or more of the following cache status information: VOQ status information, FU cache status information and OQ status information. That is, one or more of these state information are monitored.
[0030] According to the different execution subjects of this method, it can be divided into two types: centralized and distributed. First, the centralized bandwidth control...
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The invention provides a method and a system for controlling bandwidth, which monitors the buffer memory of a switching network device by obtaining the buffer memory state information of the switching network device; when data frame congestion or overflow is confirmed in the buffer memory of the switching network device according to the buffer memory state information, data frame transmission bandwidth used in varied virtual output queues (VOQ) is adjusted according to the congestion and overflow situations; therefore, a mechanism that can timely adjust the data frame transmission bandwidth used in varied VOQ when data frame congestion or overflow happens in the buffer memory of the switching network device during data exchange process is provided, thereby effectively avoiding loss of the data frame during the data exchange process and guaranteeing the quality of service (QoS) of data exchange business.
Description
technical field [0001] The invention relates to network communication technology, in particular to a bandwidth control method and system. Background technique [0002] The switching network device is the core part of equipment such as modular routers and switches, and is responsible for data exchange between line cards at each port or slot. The composition of the existing switching network device is as follows: figure 1 As shown, the switching network device mainly includes a core switching unit (FU, Fabric Unit) and a switching access unit (FAU, FabricAccess Unit), each FAU is responsible for the connection between the FU and each line card, and the FU connects each line card through each FAU A Packet Processor (PP, Packet Processor) in is used to complete the data exchange between the line cards. Wherein, the FAU can be set on the line card, and the FU can be set on the switching fabric board. [0003] In order to reduce the cost of the switching network device and ensu...
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Inventor 余昌刚
Owner NEW H3C TECH CO LTD