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Buffer region early-release method and its related media access control chip

A media access control and buffer technology, applied in Ethernet media access control chips and early release buffer areas in Ethernet switches, can solve problems such as network switch congestion

Inactive Publication Date: 2005-05-04
GENESYS LOGIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally speaking, the maximum length of an Ethernet packet is 1522 bytes long, and in NAS / SAN systems there are 9.6K (1K=10 3 ) The application of jumbo packets with a length of 1 byte. Only a few such jumbo packets can occupy the built-in 1M bit memory, causing congestion of the network switch (congestion)

Method used

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  • Buffer region early-release method and its related media access control chip
  • Buffer region early-release method and its related media access control chip
  • Buffer region early-release method and its related media access control chip

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Embodiment Construction

[0014] image 3 Shows the flow chart of the method for early release of the buffer according to the present invention, using an Ethernet switch with multiple connection ports and temporary storage as an example, starting from step 300, step 310, from a source of these connection ports The connection port receives the Ethernet packet; step 320, the Ethernet switch configures an appropriate buffer to store the Ethernet packet according to the size of the Ethernet packet, and the Ethernet switch uses a temporary storage unit according to a buffer of a fixed size, The buffers are numbered and managed separately and woven and connected in an appropriate way, for example, according to figure 2Weaving and concatenating in a way so that the buffer associated with the Ethernet packet includes a plurality of buffers 200, 210, ..., 220, 230 to temporarily store the data of the Ethernet packet sequentially. The Ethernet packet can be divided into Unicast, multicast, and broadcast packet...

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Abstract

The invention is an early buffer area releasing method and its related media access control chip, and the method includes the following steps: receiving Ethernet packet from source connection port, configuring a buffer area with many buffers to store the Ethernet packet, where these buffers are woven and connected in series in turn, starting transmitting the Ethernet packet to destination connection port, and if the destination connection port is of a full-duplex transmitting mode, instantly release each buffer as finishing the transmission for each buffer, where the Ethernet packet can be a unicast packet, a multicast packet, and even a broadcast packet; if the destination connection port is of a half duplex transmitting mode, only when the transmission of 128 bytes of the Ethernet packet is better completed can it release the corresponding buffer.

Description

(1) Technical field [0001] The present invention relates to a method for early release buffer and its related media access control chip, in particular to a method for early release buffer in an Ethernet switch and its related Ethernet media access control chip . (2) Background technology [0002] The Ethernet switch can provide multi-port network connection, and each port can provide line speed (linespeed) 10M / 100M / 1000M (1M=10 6 ) full-duplex data transmission and reception. The core of the Ethernet switch is the medium access controller (MAC controller for short), which is typically responsible for the work of the second layer and some of the third layer and above in the operation of the seven-layer network. The media access controller is coupled to the entity Layer (physical layer, referred to as PHY), to provide a multi-port network connection, responsible for the transmission and reception of signals with remote entities. The media access controller first temporarily...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/00
Inventor 陈任凯蔡文仲
Owner GENESYS LOGIC INC
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