Dropped Connections

[steve menard]

yes that is likely the culprit
a mismatched MTU will cause drops and black screens and pauses

data  packet sent fragmentation issue
transaction never completes


steve
I wondered about that when I saw this:
 
http://support.microsoft.com/default.aspx?scid=kb;en-us;826159&Product=winxp 
<http://support.microsoft.com/default.aspx?scid=kb;en-us;826159&Product=winxp>
 
Is that what you're referring to?  If so I suppose it would require that 
we lay hands on every workstation in the organization all every location. 



 > Date: Thu, 28 Feb 2008 01:13:44 -0400
 > From: edranem "at" dranem.org
 > To: carpenter_trace "at" hotmail.com
 > CC: vnc-list "at" realvnc.com
 > Subject: Re: Dropped Connections
 >
 > it is a per station setting that needs to be adjusted
 >
 >
 > Trace Carpenter wrote:
 > > Thanks for the reply. Unfortunately Sonicwall doesn't have an option
 > > to adjust the VPN MTU. The option is to enable Fragmented Packet
 > > Handling. It has always been enabled and the "Ignore Don't Fragment
 > > Bit" option is also checked.
 > >
 > >
 > > > Date: Wed, 27 Feb 2008 19:07:54 -0400
 > > > From: edranem "at" dranem.org
 > > > To: carpenter_trace "at" hotmail.com; vnc-list "at" realvnc.com
 > > > Subject: Re: Dropped Connections
 > > >
 > > > I have seen this due to non matching MTU settings
 > > >
 > > >
 > > > Trace Carpenter wrote:
 > > > > For years I've been battling a problem that no one seems to be
 > > able to solve.
 > > > >
 > > > > When using RealVNC we commonly encounter a dropped connection with
 > > the error
 > > > > message "Connection reset by peer (10054)." When testing with
 > > TightVNC the
 > > > > error still occurs, but he message displayed by that program is
 > > "Error waiting
 > > > > for server message."
 > > > >
 > > > > According to much of what has been written by James Weatherall,
 > > the problem is
 > > > > usually attributed to a lack of bandwidth and it is suggested that
 > > a rate
 > > > > limit on mouse pointers be inacted. In our case, we commonly see
 > > it when going
 > > > > across a 100Mbps LAN at all three of our locations and when
 > > transversing a VPN
 > > > > tunnel between the LANS. The VPN tunnel is a dedicated tunnel
 > > running between
 > > > > Sonicwall TZ170s and the pipe between the locations are T-1 so
 > > bandwidth seems
 > > > > to be an unlikely culprit.
 > > > >
 > > > > In a testing situation I have often left VNC sessions open for >24
 > > Hours which
 > > > > have been stable when no one is using either computer. The problem
 > > seems to
 > > > > occur most often when you have a session going between your
 > > workstation and a
 > > > > remote server, AND you are working on other things at the same
 > > time. For
 > > > > example, while working on the remote machine you open another
 > > window on your
 > > > > local machine to enter some data and then go back to the remote
 > > machine
 > > > > window. It is at that time you will see the failure.
 > > > >
 > > > > All machines are current class machines running at least 1.5 Gigs
 > > of memory
 > > > > and Windows XP Professional.
 > > > >
 > > > > There seem to be a few other threads with this exact same problem
 > > that have
 > > > > been tested in the same manner and have gotten the same error
 > > messages from
 > > > > the different VNC flavors, but I have yet to find a response to
 > > their request.
 > > > > Hopefully I've included enough details to help resolve this.
 > > > >
 > > > > Any insight would be greatly appreciated.
 > > > > _________________________________________________________________
 > > > > Need to know the score, the latest news, or you need your
 > > Hotmail.-get your
 > > > > "fix".
 > > > > http://www.msnmobilefix.com/Default.aspx
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 > > > >
 > > > >
 > >
 > > 
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