The mtu value is the largest transmission unit, and the packet should be fragmented when it is forwarded through the router. Allow the largest slice to pass. If the slice is larger than the mtu value, a part will be discarded and packet loss will occur. The default mtu of general routers should not be modified, which is in line with network standards.
Fragmentation and reorganization of MtuIP:
The maximum transmission unit (mtu) varies with different MTU data links. Because IP protocol is the upper layer of data link, it must be able to be used regardless of the MTU size of data link. When the IP datagram is too large, fragmentation technology should be adopted to ensure that the data frame is not greater than the MTU of the network to be traversed.
Besides routing addressing, mtuIP protocol also has an important function, which is the fragmentation of IP datagrams. Each data link layer can determine the maximum length of the transmitted frame, which is called the maximum transmission unit. In Ethernet, MTU is 1500 bytes; In FDDI, MTU is 4352 bytes; In IP over ATM, MTU is 9 180 bytes. ?