[9fans] How to PXE boot with "two" DHCP servers on one network

[9fans] How to PXE boot with "two" DHCP servers on one network

[Marco Feichtinger]

My router at home also serves as the DHCP server for the network.

I have a plan9 file server and now want to pxe boot a second machine from it.
On the file server I have 'ip/dhcpd -sS' running, since it also serves bootp requests.

Now when i pxe boot the second machine, it loads 9boot, but when searching for the 
/cfg/pxe/<mac address> file, it uses the ip address of my router.

Boot Message:
        pxe on ether0 .
        (<router ip>!69): /cfg/pxe/<mac address> .T.T.T.T.T.T.T.T.T.Ttftpread1st: failed to connect to server (<router ip>!69)

How can I pxe boot other machines, without my file server acting as dhcp server for the whole network?

-marco


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Re: [9fans] How to PXE boot with "two" DHCP servers on one network

[Kurt H Maier via 9fans]

On Mon, Mar 25, 2024 at 04:52:29PM +0100, Marco Feichtinger wrote:
> My router at home also serves as the DHCP server for the network.
> 
> I have a plan9 file server and now want to pxe boot a second machine from it.
> On the file server I have 'ip/dhcpd -sS' running, since it also serves bootp requests.
> 
> Now when i pxe boot the second machine, it loads 9boot, but when searching for the 
> /cfg/pxe/<mac address> file, it uses the ip address of my router.
> 
> Boot Message:
>         pxe on ether0 .
>         (<router ip>!69): /cfg/pxe/<mac address> .T.T.T.T.T.T.T.T.T.Ttftpread1st: failed to connect to server (<router ip>!69)
> 
> How can I pxe boot other machines, without my file server acting as dhcp server for the whole network?

don't run two dhcp servers.  turn off the one on your fileserver and
configure your router to pass next-server: <fileserver-ip> to clients
that should pxe boot from the fileserver.  it just needs to support
tftp.

khm

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Re: [9fans] How to PXE boot with "two" DHCP servers on one network

[Lyndon Nerenberg (VE7TFX/VE6BBM)]

Marco Feichtinger writes:

> How can I pxe boot other machines, without my file server acting as dhcp se=
> rver for the whole network?

It might be possible, but not worth the effort. And with the blackbox
DHCP server in that router, it's likely impossible.

If your file server is up all the time, just make it the DHCP server
for the network.

--lyndon

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Re: [9fans] How to PXE boot with "two" DHCP servers on one network

[Marco Feichtinger]

Thanks for the solutions.

I set the next-server ip on my router and got the second machine up and running.
Didn't saw/know that there is an own configuration mask for network booting on 
my router.

-marco


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