Learning Network Manager Thread, Laptop not booting from PXE in Technical; Hi, ive just had a Toshiba laptop returned after being repaired.
I'm trying to image it but am getting the ...
23rd April 2010, 10:12 AM #1
Laptop not booting from PXE
Hi, ive just had a Toshiba laptop returned after being repaired.
I'm trying to image it but am getting the error "PXE-E55 Proxy DHCP Service did not reply to request on port 4011".
Ive gone through the process on another workstation and it works fine....
Im stuck! lol
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23rd April 2010, 10:36 AM #2
Have you tried the working workstation and the Toshiba laptop on the same physical bit of network cable?
Do you have MAC address specific settings or options enabled in DHCP?
Can you check if the Tosh NIC is actually working (activity light, ping from the laptop etc.)?
23rd April 2010, 11:21 AM #3
not a cable issue (phew!)
This is a system that was in place before me and ive never had to add mac addresses to anything since ive added new hardware, so i think thats a no...
NIC can ping my servers and give me internet access....
23rd April 2010, 12:06 PM #4
This may seem a bit simplistic, but............
Are you sure your image server is switched on?
Our WDS sometimes gets a blue-screen, which we don't notice until we actually want to deploy an OS.
Check the IP address, subnet mask, default gateway and DHCP server of the non working PC if you still have a Windows install left on it, against the PXE boot of a working one.
23rd April 2010, 01:43 PM #5
Simple is fine! Sometimes you overlook the obvious...
Server is alive and kicking, will compare settings now.
23rd April 2010, 02:07 PM #6
a) If you have spanning tree turned on, is portfast enabled on the switch you're connected to?
b) Is the Bios on the laptop up-to-date?
The biggest cause of netbooting wierdness here is portfast being off.
23rd April 2010, 02:52 PM #7
Ok a is where i fall into the catergory of learning network manager...
Our switches are mangaged remotely. This is the first time i've had this problem.
I have just updated the BIOS but that doesnt seem to have helped
23rd April 2010, 02:59 PM #8
I lie! The laptop is trying to contact the wrong server i think....
Laptop DHCP is **.***.***.55 which is DC
Working workstation **.***.***.52 which is the image server...
What does that mean!?
23rd April 2010, 03:12 PM #9
The PXE packet (from the laptop) is broadcast over the network and any DHCP server can respond. The DHCP "Offer" can include information about where the PXE server is (via for example Option 60 and Option 43). The client will then try to boot from the specified server.
If the DHCP server doesn't tell the client where to go, any PXE-server can reply to the original PXE request directly.
Assuming that you only have one DHCP server, can you check which Options are set?
23rd April 2010, 03:14 PM #10
It means the DHCP lease information the laptop is recieving is wrong. Specifically the TFTP server address. This information is given out by the DHCP server, so check whats happening on that. I would imagine you have different client classes setup and you simply have to move the Laptop MAC from your 'default' client class into the one for your PXE clients.
23rd April 2010, 03:15 PM #11
Oh, and what is your PXE/imaging server? Does it have a maximum number of clients licence or maintain a list of known clients?
23rd April 2010, 03:17 PM #12
Are there any relevant logs you can post?
23rd April 2010, 03:50 PM #13
Argh my head!!
i think ive found the options that you were talking about. 60 is ticked (classID)?
When i say image server, it has different roles but its where i image from.
The rest, i have no idea...
This laptop has been on the network before it went to be repaired. So whats changed with the network?
23rd April 2010, 04:00 PM #14
Option 60 normally means "go back to the DHCP server to get the image to boot from", which is what your laptop is trying to do (and thus getting no response).
So we need to find out why your workstation is finding the correct PXE server!
When you are PXE-booting, try pressing the <pause> key just before the system boots and check the address of the DHCP server and the boot server in the preboot screen.
Compare these for the laptop and workstation and make sure that they are both getting DHCP addresses from the same server.
If they are, then it has to be some DHCP setting that needs tweaking.
23rd April 2010, 04:05 PM #15
Option 60 should list the PXE boot server. Either via IP or hostname (some PXE Stacks don't have the brains for DNS though).
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