Hi,
we had the same problem with SPP just using eth0 and had a deep dive into the SPP ISO. Let me explain the details:
There is already a function that loops over every network adapter and tries to get an address via DHCP. The problem is that if the dhcpcd client does not get an address via DHCP it makes a fallback to APIPA, so it gets an address like 169.254.x.x and then returns OK. The looping function then thinks that DHCP worked and skips the other interfaces.
The simple trick is now to disable APIPA in dhcpcd. This is done with the '-L' switch.
So just do the following:
- Extract the original initrd:
# mkdir /tmp/initrd
# cd /tmp/initrd
# gunzip -c /tftp/hp/initrd.img | cpio -i
- Extract the root filesystem:
# mkdir rootfs
# cd rootfs
# busybox unlzma -c ../fs.tar.lzma | tar xvf -
- Apply the small patch (the -L switch to dhcpcd) to root/compaq/netconfig.sh:
root@kitty[compaq]# diff -c netconfig.sh /tmp/initrd/root/compaq/netconfig.sh
*** netconfig.sh Fri Mar 2 08:36:47 2012
--- /tmp/initrd/root/compaq/netconfig.sh Fri Apr 27 17:06:29 2012
***************
*** 40,46 ****
fi
if [ $PROTOCOL == "dhcp" ]; then
echo Attempting to configure $1 using DHCP
! dhcpcd -t 45 $1
TEMP=$?
echo return from dhcpcd $TEMP
if [ $TEMP != 0 ]; then
--- 40,46 ----
fi
if [ $PROTOCOL == "dhcp" ]; then
echo Attempting to configure $1 using DHCP
! dhcpcd -L -t 45 $1
TEMP=$?
echo return from dhcpcd $TEMP
if [ $TEMP != 0 ]; then
(if you like you can decrease the timeout of 45 seconds to a lower value to make the boot process faster)
- repack the rootfs and remove the unpacked data:
# tar cf - . | lzma -c > ../fs.tar.lzma
# cd ..
# rm -rf rootfs
- repack the initrd:
# find . | cpio --create --'format=newc' | gzip > /tftp/hp/initrd.img
So this helps servers boot from _any_ network device that has DHCP configured.
Christopher
