PXE Booting Issue

[itguy77]

Certain models of computer will not UEFI PXE boot unless in the server VLAN (Viglens and 1 model of HP laptop.)

These computers have PXE'd in the past, but cores have changed and so have the DHCP servers (although options kept the same.)

 

We have:

HP Core Switches with IP Helper configured. Dell Edge Switches have tried with and without ip helpers on.

SCCM Server with latest patches

1 server VLAN and then individual building VLANS

 

Have tried:

No DHCP options 60/66/67

Tried DHCP with various options of 60/66/67

Options 66 and 67 all the rest of the model computers will PXE.

If I turn on legacy by altering option 67 the Viglens will PXE (but I don't really want to change the BIOSs of 300+ viglens...)

 

I am running out of ideas... Help?

[BKGarry]

I have had this issue,

It was specifically with the HP Stream 11 G4 EE a BIOS update solved with, but what I have ended up doing is using a secondary network port on the WDS Server VM and point that one directly at the client VLAN.

 

I know that is slightly messy, but would could do this for your VLANs to boot them up and image them.

[itguy77]

Thanks, Probably would work but we have several VLANs due to the campus size so would need several client VLANs and so network adaptors. Its a hyper v host so possible but slightly fiddly due to the server switch.

 

As this used to work, I think there must be another answer....

[Areku]

portfast maybe?

[itguy77]

Are you suggesting portfast is the problem or a possible fix? We're not using at present.

[Areku]

As i recall, portfast brings the interface up on the switch instantly, otherwise there a time of negotiation and monitoring. is it possible the switch isnt making the port live quick enough for these units to pxe boot?