[Dnsmasq-discuss] dnsmasq dhcpProxy and PXE next-server not working

[Jorge Schrauwen]

Hey All,

I'm trying to setup a pxe server using dnsmasq and grub2 pxe
(some minor testing with iPXE too).

The initial PXE binary gets send and downloaded over tftp fine,
however the next-server is set to my main dhcp server and not the
dnsmasq server acting as a proxy.

So grub2 is useless because it cannot load anything from the tftp root.
I also verified it with iPXE's config that next-server is set to my
main dhcp server's IP and not the proxy.

Is this a bug or am I doing something wrong? Config below.\

Would configuring a normal dhcp server instead that only reponds
to PXE clients be a better solution than a dhcp proxy? That would
mean I need to change my existing dhcp server to ignore pxe clients.
I would rather not do this.



(I cannot compile a newer dnsmasq on solaris it fails to compile)
root at aurora# dnsmasq -v
Dnsmasq version 2.68  Copyright (c) 2000-2013 Simon Kelley
Compile time options: IPv6 GNU-getopt no-DBus no-i18n no-IDN
DHCP DHCPv6 no-Lua TFTP no-conntrack no-ipset auth

This software comes with ABSOLUTELY NO WARRANTY.
Dnsmasq is free software, and you are welcome to redistribute it
under the terms of the GNU General Public License, version 2 or 3.

root at aurora# cat /opt/obd/etc/dnsmasq.conf
##### dnsmasq configuration
### set user/group
user=dnsmasq
group=dnsmasq

### logging
## specify syslog facility (- to disable)
log-facility=-
log-dhcp
log-queries

### interfaces
interface=zaurora0
bind-interfaces

### dns server
port=0

### tftp server
enable-tftp
tftp-root=/srv/pxe

### dhcp server
dhcp-leasefile=/opt/obd/var/dnsmasq/dnsmasq.leases
dhcp-range=172.16.15.254,proxy
## iPXE debug
##  this works, because iPXE will fetch 
http://aurora.acheron.be/boot.ipxe initially
##  config shows next-server of 10.1.0.1 and not 10.1.0.254
#dhcp-userclass=set:ipxe-boot,iPXE
#dhcp-boot=tag:!ipxe-boot,boot.kpxe,10.1.0.254
#dhcp-boot=tag:ipxe-boot,http://aurora.acheron.be/boot.ipxe,10.1.0.254
#pxe-prompt=tag:!ipxe-boot,"Press F8 for boot menu", 5
## grub2 pxe
##  this fails, sets root to (pxe:10.1.0.1) and not to (pxe:10.1.0.254)
##  due to wrong next-server. Initial tftp payload of grub.0 makes it
dhcp-vendorclass=set:pxe,PXECLient
dhcp-boot=tag:!pxe,boot/grub/i386-pc/grub.0,10.1.0.254
pxe-prompt=tag:!pxe,"Press F8 for boot menu", 5

Thanks

Jorge