Re: scp and packet loss

["Jerry Feldman-2" <user=4@nabble.blu.org>]

 On Fri, 4 Jan 2008 13:48:25 -0500 (EST) 
"Rich Braun" <[hidden email]> wrote: 

> John Boland wrote: 
> > I had a similar problem that we tracked down to a duplex mismatch 
> > between all of the switch/router/firewall uplink ports and the server. 
> > basically, auto-negotiate is NOT your friend! 
> 
> A couple weeks ago I had an unrelated performance problem when putting a new 
> server online, and dope-slapped myself for not remembering to check duplex 
> mismatch.  (A port was set to 100/full, the server autonegotiated incorrectly 
> to 100/half when I expected 1000/full.) 
> 
> But this one is a lot more obscure than that.  As the first responder pointed 
> out, the first question is why TCP wouldn't correct the problem--hence there 
> is a 99.999% chance this has to be at protocol layer 4 or above, not inside 
> the network.  (The online backup vendor has yet to figure that one out...) 
> 
> A mismatched duplex problem won't cause applications to completely fail, but 
> run slower than expected.