Best posts made by JLE

Yep, that solved it. Routing was the whole problem. Option 3 on the DHCP server for Vlan 300 was indeed outside of the subnet for that scope. I pointed it to the SVI on the routing stack and everything is great. We now have FOG with vlans! Thanks guys.

@Sebastian-Roth I changed the FOG server over to 255.255.240.0, the old subnet was from before vlans were implemented it just got passed over

@defcon said in Unable to PXE boot on from different subnet:

On the subnet that is 10.80.x.x the Dell computer won’t PXE boot, but when I bring the computer physically on this network it boots just fine in PXE.

When you move this computer are you hooking it up to an entirely different switch? I recently ran into both of those errors you have posted a picture of. Here’s a checklist I’ve found that works for us:

Ip-helper address or dhcp-relays set up on each VLAN, and on each switch.
Spanning-Tree set to rapid-pvst (because of the switch model that we have.)
Portfast enabled.

Specifically with that bottom error I had to add all of the hosts to a new group (that I called Encryp Reset), go into the group general settings for that group - reset their encryption data. Deploy an image to the hosts again - got that same error again (no configuration methods succeeded) Then I rebooted the computer and upon the next cycle it worked just fine. I’ve had to do this maybe 50-60 times so far. Random Dell Optiplex 990s just seem to do it.

@george1421 Well, I think I have it figured out. Thanks for the kick in the right direction. The problem was apparently that the primary stp root for vlan 300 was a completely different switch in a different building. I set the main switch here in this building (where vlan 300 is anyways) to be the primary root and so far every one I’ve tested works. I am about to image a few labs so that will be the real test.