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PXE and Mac Authentication

Michael Busse
Occasional Visitor

PXE and Mac Authentication

We're currently testing Mac Authentication out in one of our departments, and right off hand it's working great. We're primarily using HP2650 switches which authenticate against a windows IAS.

We have a problem when it comes to PXE booting the clients. The PXE boot times out the first 1-minute cycle, and wont be able to contact the DHCP server until the second attempt (after 1+ minute). We're assuming this is due to the NIC being reset during POST, and have to re-authenticate and therefore times out during the first attempt (this does seem like a tad long authentication process though).

We got various clients, all displaying this behaviour. The newest client type is DC7700's. BIOS updates does not help.

Does anyone have a solution to this?
3 REPLIES
Matt Hobbs
Honored Contributor

Re: PXE and Mac Authentication

I would also think the authentication would quick enough not to affect this.

If you have spanning-tree eanbled, make sure the port is set to an edge-port. Also try disabling LACP, that will speed up the port going into a forwarding state.
Michael Busse
Occasional Visitor

Re: PXE and Mac Authentication

Thanks for the suggestion, I'll give it a go :)
Michael Busse
Occasional Visitor

Re: PXE and Mac Authentication

Tried disabling both LACP and spanning tree. Did not help. I appreciate the suggestions though, thank you :)