ifupdown error on startup, Debian Xen

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Hi,

I am running a server as a Xen host. I think something other than
ifupdown is starting my network interfaces on boot. A symptom of the
issue is that the Xen bridge fails to start, and ipv6 does not work.

If I run ifconfig eth0 down && sleep 2 && ifup eth0 and then
restart xend, the network bridge works fine, and ipv6 is started. Any
clues ?




Info :


control:~# cat /etc/network/interfaces
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
address 193.239.32.152
netmask 255.255.255.0
network 193.239.32.0
gateway 193.239.32.1

iface eth0 inet6 static
address 2a02:c30:1:1::152
netmask 64
gateway 2a02:c30:1:1::1


control:~# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:1e:c9:ba:cf:96
inet addr:193.239.32.152 Bcast:193.239.32.255 Mask:
255.255.255.0
inet6 addr: fe80::21e:c9ff:feba:cf96/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:191 errors:0 dropped:0 overruns:0 frame:0
TX packets:125 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:17390 (16.9 KiB) TX bytes:16635 (16.2 KiB)
Interrupt:16


control:~# ifconfig eth0 down && sleep2 && ifup -v -a
Configuring interface eth0=eth0 (inet)
run-parts --verbose /etc/network/if-pre-up.d

ifconfig eth0 193.239.32.152 netmask 255.255.255.0 broadcast
193.239.32.255 up
route add default gw 193.239.32.1 eth0
run-parts --verbose /etc/network/if-up.d
run-parts: executing /etc/network/if-up.d/mountnfs
run-parts: executing /etc/network/if-up.d/openssh-server
Configuring interface eth0=eth0 (inet6)
run-parts --verbose /etc/network/if-pre-up.d
ifconfig eth0 up
ifconfig eth0 add 2a02:c30:1:1::152/64
route -A inet6 add ::/0 gw 2a02:c30:1:1::1 eth0
run-parts --verbose /etc/network/if-up.d
run-parts: executing /etc/network/if-up.d/mountnfs
run-parts: executing /etc/network/if-up.d/openssh-server

control:~# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:1e:c9:ba:cf:96
inet addr:193.239.32.152 Bcast:193.239.32.255 Mask:
255.255.255.0
inet6 addr: 2a02:c30:1:1::152/64 Scope: global
inet6 addr: fe80::21e:c9ff:feba:cf96/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:191 errors:0 dropped:0 overruns:0 frame:0
TX packets:125 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:17390 (16.9 KiB) TX bytes:16635 (16.2 KiB)
Interrupt:16

ii libc6-xen 2.7-18 GNU C
Library: Shared libraries [Xen version]
ii libxenstore3.0 3.2.1-2
Xenstore communications library for Xen
ii linux-image-2.6.26-1-xen-686 2.6.26-13lenny2 Linux
2.6.26 image on i686, oldstyle Xen support
ii linux-modules-2.6.26-1-xen-686 2.6.26-13lenny2 Linux
2.6.26 modules on i686
ii xen-hypervisor-3.2-1-i386 3.2.1-2 The Xen
Hypervisor on i386
ii xen-linux-system-2.6.26-1-xen-686 2.6.26-13lenny2 XEN
system with Linux 2.6.26 image on i686
ii xen-shell 1.8-3 Console
based Xen administration utility
ii xen-tools 3.9-4 Tools
to manage Debian XEN virtual servers
ii xen-utils-3.2-1 3.2.1-2 XEN
administrative tools
ii xen-utils-common 3.2.0-2 XEN
administrative tools - common files
ii xenstore-utils 3.2.1-2
Xenstore utilities for Xen


Linux control 2.6.26-1-xen-686 #1 SMP Fri Mar 13 22:30:40 UTC 2009
i686 GNU/Linux


Thanks
Andy
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On 4 Jul 2009, at 19:27, Andy Davidson wrote:

> If I run ifconfig eth0 down && sleep 2 && ifup eth0 and then
> restart xend, the network bridge works fine, and ipv6 is started.
> Any clues ?

Hi, --

I have more on this now. It happens without xen... I re-enabled RA on
my test LAN. I have configured :

auto eth0
iface eth0 inet static
address 193.239.33.245
netmask 255.255.255.128
gateway 193.239.33.129
dns-nameservers 193.239.32.10

iface eth0 inet6 static
address 2a02:c30:20:1::245
netmask 64
gateway 2a02:c30:20:1::1


If I run ifconfig eth0 down && sleep 2 && ifup eth0, then the computer
picks up the address I list in the interfaces file. If I reboot, then
I get a RA address (or no address when RA/autoconfig is turned off.)

This is on a clean, brand new Debian install 5.0.2.

Why is boot time behaviour different to a manual down/up ? And this
is clearly broken, what to do to fix ?

Thanks
Andy
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