Public bug reported:
we're trying to migrate our network configuration from lucid to precise.
in 10.04 we tied eth0+eth1 together into bond0, then set br0 up on top
of that and assigned an address via dhcp. in 12.04 this only works if
br0 is configured with a static ip address. it fails when trying to use
dhcp. to simplify testing i've removed eth1 from the configuration
(sanity checked against http://www.stgraber.org/2012/01/04/networking-
in-ubuntu-12-04-lts/ ):
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet manual
bond-master bond0
auto bond0
iface bond0 inet manual
bond-slaves none
bond-mode 802.3ad
bond-miimon 100
auto br0
iface br0 inet dhcp
bridge_ports bond0
bridge_stp off
the above results in a system w/o network connectivity. the dhcp server
reports requests from an unexpected mac addr (different each boot).
udevd logs "timeout 'bridge-network-interface'". poking around a little
before the timeout shows the following 2 groups of processes:
|-ifup,1361 --allow auto eth0
| `-sh,1363 -c run-parts /etc/network/if-pre-up.d
| `-run-parts,1364 /etc/network/if-pre-up.d
| `-ifenslave,1392 /etc/network/if-pre-up.d/ifenslave
| `-sleep,2380 0.1
| |-udevd,599 --daemon
| | `-bridge-network-,1429 /lib/udev/bridge-network-interface
| | `-ifup,1457 --allow auto br0
| | `-sh,1540 -c dhclient3 -e IF_METRIC=100 -pf
/var/run/dhclient.br0.pid -lf /var/lib/dhcp/dhclient.br0.leases -1 br0
| | `-dhclient3,1541 -e IF_METRIC=100 -pf
/var/run/dhclient.br0.pid -lf /var/lib/dhcp/dhclient.br0.leases -1 br0
the ifenslave appears to be looping over that `sleep` (testing for
/run/network/ifenslave.bond0) until it is killed and the dhclient is
making its request w/the unexpected mac addr (also reported in `ip link
show br0`). interestingly br0's mac addr matches that of eth0 (as
expected) once bridge-network-interface has timed out and been killed.
a workaround appears to be adding the line:
pre-up /sbin/ifup --allow auto bond0
to the "auto br0" stanza.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: bridge-utils 1.5-2ubuntu6
ProcVersionSignature: Ubuntu 3.2.0-24.38-generic 3.2.16
Uname: Linux 3.2.0-24-generic x86_64
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Wed May 23 13:44:43 2012
ProcEnviron:
TERM=xterm
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/usr/bin/zsh
SourcePackage: bridge-utils
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: bridge-utils (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise
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https://bugs.launchpad.net/bugs/1003656
Title:
when adding a bond the bridge fails to acquire a dhcp address
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