RE: [Xen-devel] Trouble getting a DHCP address when booting.

["JHJE (Jan Holst Jensen)" <jhje@xxxxxxxxxxxxxxx>]

> > Sending DHCP requests ...
> > ************ REMOTE CONSOLE EXITED *****************
> 
> At this point, try runnning 'tcpdump -i vifXXX.0' in domain 0 
> to see if there are any packets being sent.

Yup. Loads of them. Even when eth0 is not up in the guest (lots of
broadcast packets and such). Is that normal ?

This is what happens inside the guest when I bring up the network
manually (having uncommented "dhcp = 'dhcp'" from the config file):

  deb-xenified:~# ifconfig
  deb-xenified:~# ifconfig lo up
  deb-xenified:~# ifconfig eth0 up
  deb-xenified:~# dhclient
  Internet Software Consortium DHCP Client 2.0pl5
  Copyright 1995, 1996, 1997, 1998, 1999 The Internet Software
Consortium.
  All rights reserved.

  Please contribute if you find this software useful.
  For info, please visit http://www.isc.org/dhcp-contrib.html

  Listening on LPF/eth0/aa:00:00:01:78:b3
  Sending on   LPF/eth0/aa:00:00:01:78:b3
  Sending on   Socket/fallback/fallback-net
  DHCPDISCOVER on lo to 255.255.255.255 port 67 interval 5
  DHCPREQUEST on eth0 to 255.255.255.255 port 67
  DHCPREQUEST on eth0 to 255.255.255.255 port 67
  DHCPDISCOVER on lo to 255.255.255.255 port 67 interval 9
  DHCPACK from 10.9.19.254
  bound to 10.9.18.44 -- renewal in 345600 seconds.
  
After having received an IP address I find this in the tcpdump trace

  14:27:57.612582 IP 10.9.18.44.bootpc > 255.255.255.255.bootps:
BOOTP/DHCP, Request from aa:00:00:01:78:b3,
  length: 300
  14:27:57.618531 IP 10.9.19.254.bootps > 10.9.18.44.bootpc: BOOTP/DHCP,
Reply, length: 300

When running with "dhcp = 'dhcp'" enabled I find the following in the
tcpdump output

  14:35:43.891535 IP 0.0.0.0.bootpc > 255.255.255.255.bootps:
BOOTP/DHCP, Request from aa:00:00:60:cd:2a,
  length: 548
  14:46:28.233792 arp who-has 10.9.19.254 tell 10.9.18.131
  [ and on and on... ]

but never a reply from 10.9.19.254.bootps. I also tried assigning a
fixed MAC-address in the config file like

  xen-test:~# cat debian.xen
  kernel = "/boot/vmlinuz-2.4.29-xenU"
  memory = 256
  name = "Debian-Sarge"
  nics = 1
  dhcp = "dhcp"
  vif  = ['mac=AA:00:00:01:78:B3, bridge=xen-br0']
  disk = ["file:/root/debian.sarge,sda1,w"]
  root = "/dev/sda1 ro"

but that did not help.

> > again to obtain a DHCP address. It doesn't even respond to 
> a Ctrl-C -
[...]
> 
> Sounds like your stty settings are messed up. Ctrl-c works for me.

Strange. I did not do anything special when installing domain-0 and the
guest domain. These are my stty settings in the guest

  deb-xenified:~# stty
  speed 38400 baud; line = 0;
  -brkint ixoff -imaxbel
  -iexten

and on the host

  xen-test:~# stty
  speed 38400 baud; line = 0;
  -brkint -imaxbel

Anything out of the ordinary ? I use a danish keyboard layout if that
helps explaining anything. It's not critical since the console is only
for emergency situations, but it would be nice to have it working
properly.

Cheers
-- Jan


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