Analysis on data transmission modes of the Golden wave Router

The data transmission mode of the Golden wave router is introduced to you today, so that you can set the corresponding mode When configuring the router.
1. The forwarding method www.2cto.com is one of the most widely used network technologies. The controller of the Ethernet router first caches the incoming data packets from the input port and first checks whether the data packets are correct, filter out conflicting packet errors. After confirming that the packet is correct, take out the destination address, find the output port address to be sent through the search table, and then send the packet out. The storage and forwarding method has a large data processing latency problem. However, it can detect errors of data packets entering the vro and support exchange between input and output ports at different speeds, it can effectively improve network performance, support switching between ports at different speeds, and ensure collaboration between high-speed ports and low-speed ports. The solution is to store 10 Mbps of low-speed packets, then, it is forwarded to the port at a rate of Mbps. Ii. Fragment isolation before forwarding, check whether the packet length is 64 bytes. If the packet length is smaller than 64 bytes, the packet is a false packet. If the packet length is greater than 64 bytes, this packet is sent. The data processing speed is faster than that of the storage and forwarding method, but it is slower than that of the pass-through method. However, due to the ability to avoid Frame Forwarding, this packet is widely used in low-end routers. Vrouters using this type of switching technology generally use a special cache, which is a kind of FIFO, bits enter from one end and then exit from the other end in the same order. When a frame is received, it is saved in FIFO. If the frame ends with a length less than 512 bits, the content in the FIFO will be discarded. Therefore, there is no Frame Forwarding problem in the normal direct-through router, data packets are cached and saved before forwarding to ensure that collision fragments are not transmitted over the network, which can greatly improve the network transmission efficiency. 3. A router with the direct-through switching method www.2cto.com can be understood as a crossover line between ports. When the input port detects a packet, it checks the packet header of the packet, obtain the destination address of the package, start the internal dynamic search table to convert it to the corresponding output port, connect the data packet to the corresponding port at the intersection of the input and output, and implement the switching function.
Because it only checks the packet header and does not need to be stored, the cut-in method has the advantages of low latency and fast switching speed. The main disadvantages include: 1. Because the data packet content is not saved by the Ethernet router, it is impossible to check whether the transmitted data packet is incorrect and the error detection capability cannot be provided. 2. Because there is no cache, the input and output ports with different rates cannot be directly connected, and packet loss is easy. If you want to connect to a high-speed network, such as providing fast Ethernet, FDDI, or ATM connections, you cannot simply "Connect" the input/output ports ", because there is a speed difference between the input and output ports, the cache must be provided. 3. When the port number of the Ethernet router increases, the switching matrix becomes more and more complex and the implementation becomes more and more difficult.