[K12OSN] XDM too many retransmissions

[Dennis Daniels]

Update on XDM, it was the switch! Thanks all and esp. Lewis for the help!

Dennis

Les Mikesell wrote:
> On Wed, 2004-06-23 at 13:47, Jeff Kinz wrote:
> 
> 
>>Its always good to have multiple options for network equipment
>>especially low end switches when doing an LTSP install.
>>
>>Thank you for sharing this info.  It is definitely useful.
> 
> 
> A couple of things you may run into with switches:
> 
> If one end has been locked to a specific duplex setting, at
> least with Cisco equipment that will disable negotiation and the
> other end is forced to assume half-duplex if it isn't also locked,
> which is almost always wrong.  The mismatch causes dropped packets
> and a drastic reduction in throughput although tcp retries will
> tend to hide the problem.
> 
> If the switch port does not pass data while doing spanning-tree
> it may take an extra 20 to 30 seconds to connect whenever
> the port has dropped.  For clients you'll see this before a PXE boot
> and again after the kernel is loaded and tries to get it's DHCP
> address.
> 
> ---
>    Les Mikesell
>     les at futuresource.com
> 
> 
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