** No longer affects: qemu
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Title:
bonding inside a bridge does not update ARP correctly when bridged net
accessed from within a VM
To manage n
** Also affects: qemu
Importance: Undecided
Status: New
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Title:
bonding inside a bridge does not update ARP correctly when bridged net
Hello,
Now I am dazed and confused (and trying to continue)
I have tested most of the combination of bonding modes with appropriate
switch settings and here is what I get :
Bonding modeswitch configurationresult(ping from Container)
With STP
=
I read the mail and did a first round of test before I could check the
setting of the switch. Here are the transcript of the test with
balance-rr.
Container : LXC container with fixed IP
VMhost : The host where the LXC container runs. configured with br0 & bond0
remote_host : another host on the
I sent an email to bonding-devel, and got this response:
http://sourceforge.net/mailarchive/forum.php?thread_name=21866.1306527811%40death&forum_name
=bonding-devel
Assuming that your switch is in fact set up for Etherchannel, can you go
ahead and gather the tcpdump data?
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Natty is still affected.
Since qemu isn't needed to show the bug, you can now trivially test this
inside a natty kvm container by giving it two NICs, setting up
/etc/network interfaces as shown above, and using lxc as follows:
apt-get install lxc debootstrap
mkdir /cgroup
mount -t cgroup
Maverick gives me the same result. (Except I don't seem able, in
maverick, to auto-setup the bond+bridge setup with
/etc/network/interfaces, keep having to do it by hand. Hoping I did
something wrong myself,a nd it's not a maverick bug)
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My next steps will be to test on maverick and natty, look through
linux-2.6/drivers/net/bonding and linux-2.6/net/bridge/ and perhaps go
to the https://lists.linux-
foundation.org/pipermail/bridge/2011-May/thread.html list to ask for
help if it is still broken in natty.
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I can reproduce this just using lxc, which simply attaches an endpoint
of a veth tunnel to the bridge. With balance-rr mode, i can't dhcp in
the guest. With balance-alb, I can.
That means this is not actually qemu-kvm, but a bug in the kernel or
(unlikely) ifenslave.
** Changed in: linux (Ubunt
** Changed in: qemu-kvm (Ubuntu)
Assignee: (unassigned) => Serge Hallyn (serge-hallyn)
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Title:
bonding inside a bridge does not update ARP co
** Changed in: qemu-kvm (Ubuntu)
Status: Incomplete => Confirmed
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Title:
bonding inside a bridge does not update ARP correctly when bridged
Quoting Louis Bouchard (louis.bouch...@canonical.com):
> Regarding your request for /etc/modprove.d/bonding.conf, there is no
> such file on my test system.
Right, sorry, that's obsolete as of hardy, sorry.
> Let me know if you still require the xml
> dump of the VM.
Thanks, no, as I'm able to r
Regarding your request for /etc/modprove.d/bonding.conf, there is no
such file on my test system. Let me know if you still require the xml
dump of the VM.
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Following your suggestions, I modified my /etc/network/interfaces &
added the STP options to my test environment. Following that, I am now
able to ping to the remote system using the following bonding modes :
* 802.3ad (4)
* tlb (5)
* alb (6)
For unknown reasons, I'm still unable to use balance-
Following the advice toward the bottom of
http://forum.proxmox.com/archive/index.php/t-2676.html?s=e8a9cfc9a128659e4a61efec0b758d3e
I was able to get this to work with balance-rr by changing a few bridge
properties. The following was my /etc/network/interfaces:
# This file describes the network
I'm setting up networking as described above, and then starting virtual
machines with:
sudo tunctl -u 1000 -g 1000 -t tap0
sudo /sbin/ifconfig $1 0.0.0.0 up
sudo brctl addif br0 tap0
kvm -drive file=disk.img,if=virtio,cache=none,boot=on -m 1024 -vnc :1
-net nic,model=virtio -net tap,script=no,ifn
Yup, I can reproduce this 100%.
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Title:
bonding inside a bridge does not update ARP correctly when bridged net
accessed from within a VM
--
ub
Actually, I may be wrong about this being a kernel issue.
Are you always able to ping the remote host from the kvm host, even when
you can't do so from the VM?
In addition to kvmhost's /etc/modprove.d/bonding.conf, can you also
please provide the configuration info for the KVM vm? (If a libvirt
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
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Title:
bonding inside a bridge does not update ARP correctly when bri
Thanks for reporting this bug and the detailed reproduction
instructions. I would mark it high, but since you offer a workaround
I'll mark it medium instead.
What does your /etc/modprobe.d/bonding show?
I've not used this combination myself, but from those who have, a few
things do appear fragil
** Changed in: qemu-kvm (Ubuntu)
Importance: Undecided => Medium
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Title:
bonding inside a bridge does not update ARP correctly when bridged net
** Description changed:
Binary package hint: qemu-kvm
Description: Ubuntu 10.4.2
Release: 10.04
-
- When setting a KVM host with a bond0 interface made of eth0 and eth1 and
using this bond0 interface for a bridge to KVM VMs, the ARP tables do not get
updated correctly and
+ When set
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