Re: [uml-user] Cannot bringup DHCP (2.6.39 kernel + Debian 5.0 rootfs)

[Antoine M. <an...@na...>]

On 11/30/2011 02:54 AM, ning ji wrote:
> 
> Hi everyone,
> I'm new to UML, having issues bring up DHCP for my uml.
> step 1:./kernel2.6.39  ubda=./debian50.rfs  mem=128M  eth0=tuntap,,,10.50.183.254
Have you tried using a specific tap device here? Like:
(...) eth0=tuntap,tap1,fe:f0:00:00:00:01,10.50.183.254

> so as you see,kernel: Linux (none) 2.6.39.4 #2 Thu Sep 1 11:25:36 EDT 2011 i686 GNU/Linuxrootfs: Debian-5.0-x86-root_fs
> step 2:After it boots,(none):/etc/init.d# /etc/init.d/networking restart
> Configuring network interfaces...Internet Systems Consortium DHCP Client V3.1.1Copyright 2004-2008 Internet Systems Consortium.All rights reserved.For info, please visit http://www.isc.org/sw/dhcp/
> [    3.660000] helper_wait : waitpid process 13629 failed, errno = 10[    3.660000] * modprobe tun[    3.660000] * ifconfig tap0 10.50.183.254 netmask 255.255.255.255 up[    3.660000] * bash -c echo 1 > /proc/sys/net/ipv4/ip_forwardListening on LPF/eth0/ba:b4:8c:0a:56:95Sending on   LPF/eth0/ba:b4:8c:0a:56:95Sending on   Socket/fallbackDHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8
I find it impossible to read you emails as the formatting is just terrible.

> step 3:On the other hand, if i type these 2 commands,ifconfig eth0 10.50.181.135 netmask 255.255.252.0 up
> route add default gw 10.50.183.254 eth0
> static ip will be up for eht0, i can do ping etc.
You aren't posting all the commands that you ran, like (re)starting the
dhcp daemon, etc.

> step 4:Note for the /etc/dhcp3/dhclient.conf, i didn't change anything from the original debian_5.0 rootfs.As i compared with the one from my ubuntu desktop, they look almost the same. Certainly my ubuntu works.(I'm using debian rootfs as none of the ubuntu rootfs i downloaded works.)
Since you are referring to the Ubuntu filesystems that I made (from a
separate email), let me correct this statement slightly: these
filesystems work just fine, but not with UML, as stated on their
individual download page (IIRC Lucid is the last Ubuntu release that
booted ok with UML)

> Having been struggling this for 1 week, any help appreciated !
Have you tried following these instructions:
http://uml.devloop.org.uk/howto.html

Cheers
Antoine

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