Ethernet circuit exchange device and method

Abstract

The invention discloses an Ethernet circuit exchange device and method. A flow control module in the device is respectively connected with more than two PHY (Physical Layer) modules and exchange control modules, wherein each PHY module is respectively connected with the exchange modules for establishing an Ethernet exchange circuit; and the exchange control modules are respectively connected with the exchange module and the flow control module. The process of carrying out the Ethernet circuit exchange comprises the following steps that: (1) the exchange control modules transmit Ethernet circuit exchange information required to establish the Ethernet exchange circuit to the flow control module; (2) the flow control module reads the work mode of each PHY module required to establish the Ethernet exchange circuit, judges whether the speed rate of a physical port of the each read PHY module is consistent with that of a duplex mode or not and transmits the judge result to the exchange control module; and (3) when the speed rate of the physical port of each PHY module is consistent with that of the duplex mode, each exchange control module transmits an exchange instruction to the exchange module and the exchange module establishes the Ethernet exchange circuits among various PHY modules.

Description

technical field [0001] The invention relates to the communication field, in particular to an Ethernet circuit switching device and method. Background technique [0002] Ethernet switching technology greatly improves the application scale and coverage of the network, so Ethernet has become the default standard for LAN and MAN networking. Ethernet switching technology is based on connectionless packet switching (Connectionless Packet Switching). Ethernet switching occurs at the second layer of the OSI (OpenSystem Interconnection: Open System Interconnection) seven-layer network model, that is, the MAC (MediaAccess Control) of the data link layer. ) sublayer. Ethernet encapsulates the data to be transmitted into a fixed-format data packet, that is, an Ethernet frame, and transmits it on the network; the frame header of the Ethernet frame includes the source and destination MAC addresses, and the Ethernet switch judges how to forward and receive according to the source and dest...

AI Technical Summary

Problems solved by technology

In this way, when storing and forwarding, it is limited by the bus bandwidth, and some ports need to wait for bus resources, resulting in delay (Delay)

[0013] (2) When an Ethernet frame passes through a packet switching network node, because the "store and forward" mode is adopted, the receiving buffer 21' and the sending buffer 22' in the Ethernet frame are temporarily stored, which will cause time delay

[0014] (3) When the Ethernet frame is transmitted in the packet switching network, the switching nodes along the way of each Ethernet frame may experience different delays, causing the total delay of the packet to vary greatly, resulting in jitter (Jitter)

[0015] (4) When the Ethernet frame is transmitted in the packet switching network, each switching node needs to perform "storage / table lookup / forwarding" processing for each Ethernet frame, which takes time and has a large additional cost

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