PXE - Booting issue (strange)

[george1421]

@Wayne-Workman said in PXE - Booting issue (strange):

Check your DHCP option 66 and 67.

Is the dhcp discovery tool ready for prime time?

[ITCC]

physical system…

[george1421]

Ok you mentioned that you have one machine doing this? Is it safe to assume you have others working correctly? If so what is different (network wise) between the one that doesn’t work and the ones that do work?

[ITCC]

I’ll go get screenshot / PC

[Tom Elliott]

I’m just going to guess here.

You have at least two DHCP Servers. One of those dhcp servers is responding faster than the other DHCP Server (which appears – from the info here) to be the one you “don’t” want to use.

Why not just turn off the other dhcp server?

[Tom Elliott]

That, or, configure the other dhcp server to point at the new fog server as well.

[ITCC]

nope, one DHCP server

[ITCC]

[ITCC]

it’s back in the office now and still doing it, so not switch equipment.

[george1421]

@ITCC Does this system have a dhcp reservation set on your dhcp server?

[ITCC]

have checked twice, no reservation.

Also works after pause, thought that would still resolve incorrect reservation info.

[ITCC]

we have a winner!

[george1421]

@ITCC And…

My next step is to confirm that everyone is in the same subnet then setup a packet capture into a pcap file so we can see where that alternate IP is coming from.

[ITCC]

Tom Elliott, got me thinking about a “copy” of our windows DHCP server on another DC, that was a backup to when we had issues.
this DHCP is never to be switched on and it’s approx 3 years out of date.

Guess what, somehow (someone) has authorised this scope.

• Although, no stats showing used IP’s, when deactivated the PC continued beyond the loop.

Thanks to everyone who helped.

[Wayne Workman]

@george1421 said in PXE - Booting issue (strange):

@Wayne-Workman said in PXE - Booting issue (strange):

Check your DHCP option 66 and 67.

Is the dhcp discovery tool ready for prime time?

@Sebastian-Roth Have you had any time to mess with this?

[Tom Elliott]

@Wayne-Workman I’m fairly sure Joe already is on it. Though of course Sebastian probably needs the “finishing” touches lol.

[Sebastian Roth]

@Wayne-Workman said:

@Sebastian-Roth Have you had any time to mess with this?

Have been on a short holiday far away from net and power… but working on it right now.