You can set your own MTU (setting does not persist over restarts) with sudo ip link set dev name mtu 1492 Your MTU should be set by your DHCP server, check your router's config. If your link is misconfigured, and you have to fragment every packet you send, your actual data transfer rate drops.Įthernet (wired) networks use an MTU of 1500 bytes.ĭue to additional per packet overhead for WiFi (8 bytes PPPoE header), WiFi uses an MTU of 1492. These multiple packets must be sent over the link, received, acknowledged, and reassembled at the far end. If a packet exceeds the MTU of a link, the data must be split into multiple packets (fragmented). The MTU (Maximum Transmission Unit) is the size of the largest packet that can be sent in a single network transmission.
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