In message <e1829b60731d1740bb7a0626b4faf0a65d374a8...@xch-nw-01v.nw.nos.boeing .com>, "Templin, Fred L" writes: > A quick comment on probes. Making the tunnel ingress probe > is tempting but fraught with difficulties; believe me, I > have tried. So, having the tunnel ingress fragment when > necessary in conjunction with the original source probing > is the way forward, and we should advocate both approaches. > > RFC4821 specifies how the original source can probe with > or without tunnels in the path. It does not have any RTT > delays, because it starts small and then tries for larger > sizes in parallel with getting the valuable data through > without loss.
It's useful for TCP but it is not a general solution. PTB should not be being blocked and for some applications one should just force minimum mtu use. > Thanks - Fred > fred.l.temp...@boeing.com -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org
