This helps to prevent several servers from continuously announcing simultaneously. 0 to 4294967295 minutes. Specifies the time by which unused LAN connections are disconnected. See a138365 .
Larger values can increase performance but use more memory.
A value that is too large can impede performance by causing excessive task switching. I wouldn't touch this one. Not clear what default is but this is not a value a server admin should need to fiddle with. Default is null. Provides the server's comment.