Subject: UML network problems
From: Jim Gribbin (jgribbin@alaska.net)
Date: Thu Aug 01 2002 - 00:11:19 AKDT
I have been attempting to play with User Mode Linux on my Gentoo box and
am having problems getting networking going. Actually I'm having more
problems than that, but one at a time.
I seem to have a working UML kernel going and can boot a rescue image on
it. I have tried to follow the instructions for setting up networking
both on Gentoo's site and the UML project site, they are nearly
identical.
I have the ethertap and iptables_nat modules loaded without error
messages. I have started iptables and ip_forward with the recommended
command lines.
eth0 on the host system has an ip address of 192.168.2.103
I have attempted starting UML with:
# linux load_ramdisk=1 prompt_ramdisk=0 ramdisk_size=22000 \
> initrd=rescue.gz root=/dev/ram0 ubd0=root_fs ubd1=swap_fs \
> ubd2=/dev/cdroms/cdrom0 eth0=ethertap,tap0,,192.168.0.254
and
# linux load_ramdisk=1 prompt_ramdisk=0 ramdisk_size=22000 \
> initrd=rescue.gz root=/dev/ram0 ubd0=root_fs ubd1=swap_fs \
> ubd2=/dev/cdroms/cdrom0 eth0=ethertap,tap0,,192.168.2.254
In either case the rescue image boots to a command prompt at which point
I assign an ip address to my virtual eth0 of 192.168.2.106 (using the
second version of the above command line). The instructions at both
sites imply that at this point I should be able to ping my real eth0 and
move on to setting up routing without giving any clues as to where to
look when I can't ping anything but my virtual eth0.
I have attempted setting up routing anyway and whether routing or
pinging I receive a network unreachable error message.
Anybody got any hints as to where I should be looking to troubleshoot
this?
Jim Gribbin
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This archive was generated by hypermail 2a23 : Thu Aug 01 2002 - 00:26:42 AKDT