Colin, for me on jaunty, the following /etc/network/interfaces result in
a system with broken network (ie, cannot ping or connect to anything):
-------------------------------------------
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet dhcp
auto br0
iface br0 inet dhcp
bridge_ports eth0
-------------------------------------------
However, the following works perfectly well:
-------------------------------------------
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet manual
auto br0
iface br0 inet dhcp
bridge_ports eth0
-------------------------------------------
Hence, I assume having a bridge *an* one of its member interface configured for
DHCP result in broken networking. Maybe I am not correct, or the behavior is
different in karmic.
Attached is the output of "ip addr show" and "ip route show" with the
first network config. You can see there are two default routes, etc.
** Attachment added: "Output of "ip addr show" and "ip route show""
http://launchpadlibrarian.net/31911976/ip-output.txt
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eucalyptus node install results in broken /etc/network/interfaces
https://bugs.launchpad.net/bugs/430820
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