PXE booting and Unifi Gateways

[Chris_Cook]

Hi, does anyone use a Unifi gateway with MDT/WDS or similar?

 

It seems like our new one is blocking the PXE response, but I can't see why.

 

I've got DHCP relay setup and firewall options, but even putting the pxe options into the built in DHCP server doesn't seem to work.

 

It was all working before moving to the new gateway.

[KK20]

I have a Unifi EFG and yes I use PXE with DHCP option 66/67  I use a windows failover DHCP server though, no DHCP in the unifi or switches.  top of rack switch is the vlan router with ACLs, last hop is the EFG so probably not what you are looking for. However, I just set DHCP helpers on my relevant VLANS and it all works as expected.  You havent set up DHCP guarding in the unifi have you?  Or dhcp snooping somewhere with a different IP to your new gateway (if any IPs have changed)?  If the unifi isnt DHCPing for you then I would just have set up the DHCP relay on the relevant vlans.

[Davit2005]

Have you tried allowing UDP 66 and 67 both ways?

 

Have you put in the WDS server as an IP helper if different from the DHCP server?

[Chris_Cook]

Thanks for the reply both. I had checked most of those things.

 

It turned out one of the switches needed a reboot... I guess no one likes being told to turn it off and on again!

 

I was sure I had tested it on a PC connected to another switch.

[Davit2005]

I have seen DHCP issues caused by switches a number of times, lol.