[K12OSN] dhcpd and tftp

"Terrell Prudé, Jr." microman at cmosnetworks.com
Fri Feb 18 23:57:32 UTC 2005

Les Mikesell wrote:

>On Fri, 2005-02-18 at 09:21, Rob Owens wrote:
>>I'll try swapping the NIC tonight.  My only other
>>option for a dhcp server is my Linksys router.
>One quirky thing can happen if your switch is slow to activate
>a port due to the time it takes to go though spanning-tree
>negotiations.  If timing is just right (wrong?) the client
>may do its dhcp request while the switch port is down, then
>time out and reset its own NIC before the retry, triggering
>the switch to run spanning tree again.  You can usually tell
>if this is happening by watching the switch port lights - or
>plug the client directly into the server nic with a crossover
>cable to test. If you have a managed switch you may be able
>to set the port to forward during negotiations.

Yes, we found that out with G4 boxes running OS X.  On the Catalysts, 
you've got to pretty much issue every command that stops just about 
every kind of autonegotiation except for 10/100 and duplex.  Otherwise, 
you see exactly what Les describes above.

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