Network MTU
The Maximum Transmission Unit, or MTU is the size of the largest protocol data unit that can be exchanged in a single network transaction without fragmentation.
Only the Ethernet v2 frame format is supported on both Atlas virtual machines and CloudLink connections.
Below are the supported MTU sizes for each service:
If you are using CloudLink: Traffic between CloudLink hosts, including agents, Wireguard peers and relayed traffic all must have an MTU of 1280 bytes.
If you are using Atlas virtual machines: Traffic between the virtual machine and the underlying Mutexer network must have an MTU of 1500 bytes or fewer. Any packets over 1500 will be fragmented, unless the
Don't Fragment (DF)flag is set in the IP header, in which the packets will be dropped.
CloudLink MTU Limitations
Mutexer has set the Maximum Transmission Unit (MTU) to 1280 for Wireguard-based services to ensure optimal performance and compatibility. Below is a summary of the reasons this value was chosen:
Support for Internal Limitations: The MTU of 1280 bytes helps in managing and avoiding potential fragmentation issues within the network. Fragmentation can occur when packets are too large to pass through intermediary devices that might have lower MTU settings. By setting the MTU to 1280, Mutexer is able to make sure that the packets can traverse the entire network without needing to be broken down, leading to smoother and more efficient communication.
Better Performance on Cellular Networks: Cellular networks, such as 4G and 5G, often have lower MTU limits compared to wired networks. An MTU of 1280 bytes is well-suited for these networks, reducing the likelihood of packet fragmentation and retransmission. This results in faster and more reliable connections, especially when you’re on the move and using mobile data.
By setting the MTU to 1280, Mutexer is able to provide a seamless and efficient experience across various network types, ensuring that your connections are stable and performant whether you’re using Wi-Fi, Ethernet, or cellular data.