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    SubjectRe: TCP stalls in 2.0.33 and 2.1.x
    David S. Miller writes:
    > Date: Thu, 19 Mar 1998 00:16:22 +1100
    > From: Richard Gooch <rgooch@atnf.CSIRO.AU>
    > The MTU on my SLIP link is 255. I'll check tomorrow what the CISCI
    > terminal server is set to, but I think it should be higher than
    > that. Would that cause a problem?
    > SunOS Advertised an MSS of 1460 (ethernet frame size) this must mean
    > it belives the Linux box is on the local subnet and also connected to
    > the same ethernet segment. SunOS doesn't implement path-MTU
    > discovery. So it sent the full sized frames.
    > So the conclusion I'm at right now is that either:
    > 1) the CISCO is dropping the packets completely, or...
    > 2) the CISCO is not fragmenting them correctly, or...
    > 3) the Linux box is not un-fragmenting them correctly, or
    > just plain not receiving them at all
    > And as usual, this could be yet another VJ compression bug of some
    > sort at either the CISCO or the Linux box.

    OK, so what steps should I take to test this? How about a tcpdump on
    machine A (local router) when ftp'ing from the SunOS box, and when
    sending these UDP packets?



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