On 2007-10-12 09:13, Templin, Fred L wrote:
Of course, UDP echo would work, but I am a bit concerned as to its applicability to potentially short-lived UDP flows, as can happen with TEREDO... ?Short UDP flows should still be OK, but may need to institute pacing until coordination with the TFE can be done. If the flow is so short-lived that there is no time to perform the coordination, then it is simply "out of sight - out of mind" - right?
A sender could always cache the most recently discovered PMTU to a given destination. That would be enough for repeated short UDP flows to the same destination. As for isolated short UDP flows, they just need to use the Internet minimum MTU (576 or 1280) - there's no other possible solution. Brian