Joe Landman wrote:
Hi folks:

I have been using dnsmasq for a few years within a simple network and some linux clusters. With the inclusion of the DHCP bits, and the bootp bits, suddenly the idea of replacing that fine bit of work known as the ISC DHCP server seems possible (and quite likely).

I have managed to serve some pxelinux.0 files quite nicely. What I want to do is to serve the nbgrub (network boot grub) bits, and have it read its menu.lst.

To make this happen, I need to set option T150 to (nd)/menu.lst . I am doing this via

    dhcp-option=150,"(nd)/menu.lst"

  So after setting this up, nbgrub does boot, but the logs have

Sep 3 07:40:55 autoinst dnsmasq[11915]: DHCPREQUEST(eth0) 192.168.32.34 00:11:09:cc:d3:e8 Sep 3 07:40:55 autoinst dnsmasq[11915]: DHCPACK(eth0) 192.168.32.34 00:11:09:cc:d3:e8 Sep 3 11:40:55 autoinst in.tftpd[11946]: RRQ from 192.168.32.34 filename /nbgrub Sep 3 11:40:55 autoinst in.tftpd[11946]: tftp: client does not accept options Sep 3 11:40:55 autoinst in.tftpd[11947]: RRQ from 192.168.32.34 filename /nbgrub

and then nothing (e.g. no menu.lst request), and the grub just hangs there.

What am I doing wrong? Will dnsmasq work this way or can it serve only pxelinux like bits?

  Here are my relevant dnsmasq.conf options:

    domain=boot.scalableinformatics.com
    dhcp-range=192.168.32.1,192.168.32.128
    dhcp-boot=/nbgrub,autoinst,192.168.32.217
    dhcp-option=150,"(nd)/menu.lst"

  Thanks!

Joe



That should all work: the only obvious (potential) problem is the quotes in the dhcp-option line. They are not strictly necessary, and will break things on earlier dnsmasq versions. They should be OK with 2.22 and 2.23, at least.

Can you use tcpdump or ethereal to grab the complete DHCPREQUEST and DHCPACK packets and send them to me off list? That's by far the easiest way to see if the problem is dnsmasq configuration or not.

Cheers,

Simon.



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