On Thu, 17 Apr 2003, James Yonan wrote: > The nice part about a radio link is that it is probably under your control, > meaning that you can ensure that ICMPs get properly passed. This allows path > MTU discovery to work and therefore solves a lot of the harder problems.
Well, at least for the bits that crossed a Linux 2.2 masquerade router... > In this case, the FRAGMENT_ENABLE code would take the Path MTU hint from the > OS rather than trying to figure it out empirically by trial-and-error. The > current FRAGMENT_ENABLE code knows how to get the PMTU from Linux, but still > needs code for other OSes. For FreeBSD, apparently the routing table has to be queried for the MTU -- unless someone comes up with better information. NetBSD has an IP_RETURNMTU ioctl, I'm unsure about other systems. Seems to be non-standard :-/
