29 Oct
2012
29 Oct
'12
7:02 p.m.
Hi Bill,
Maybe something as simple as clearing the don't fragment flag and adding a TCP option to report receipt of a fragmented packet along with the fragment sizes back to the sender so he can adjust his mss to avoid fragmentation.
That is in fact what SEAL is doing, but there is no guarantee that the size of the largest fragment is going to be an accurate reflection of the true path MTU. RFC1812 made sure of that when it more or less gave IPv4 routers permission to fragment packets pretty much any way they want. Thanks - Fred fred.l.templin@boeing.com