slow dhcp on 1G backbone.

[Dean Montgomery]

> Where are these 12 second delays in your capture/syslog? Are the
> clients  sending requests that are not seen by the server?

This could be the case - dhcp traffic is not traveling over the LAN in a timely manner.  and/or dhcp traffic is being lost by the Procurve switches.

Just before bios pxeboot & kernel's dhcprequest, the link-light turns off then on again.  It may be the switch is slow trying to re-negotiate link speed with the client.

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I tried changing the switch configured speed on port16 from "Auto" to "100Fd".  This made the client on port16 continually loose it's link.

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* All switches have the latest firmware.

* All switches have factory default settings (except we turn on spanning tree).  We tested spanning tree off earlier and it is not the cause.

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NOTE: This slow dhcp has been an "ignored issue" for 4 years in many schools.  I now have a bit of free time to see if it can be resolved.



-- 
Dean Montgomery
Network Support Tech./Programmer
dmonty at sd73.bc.ca
School District #73