2msl in linux kernel
时间: 2023-10-28 21:33:20 浏览: 45
In the Linux kernel, 2msl refers to the two maximum segment lifetime timers used in TCP/IP networking.
The maximum segment lifetime (MSL) timer is a value that represents the maximum amount of time a TCP segment can remain in the network before it is discarded. This timer is set to twice the maximum segment lifetime (2MSL) to ensure that all segments from a previous connection have been cleared from the network before a new connection can be established.
In practical terms, this means that when a TCP connection is terminated, the kernel will wait for 2MSL before freeing the resources associated with the connection. During this time, any remaining packets from the connection may still be delivered and processed, after which the connection is considered fully closed.
Overall, the 2MSL timer is an important part of TCP/IP networking that helps ensure that connections are properly closed and that network resources are not tied up indefinitely.