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Could you show the contents of /etc/xen/scripts/vif-bridge?
Is it random whether the 10.x.x.x or 216.x.x.x device goes down?
Is it perhaps always the one with the higher or lower mac address?
Once this affects a guest, and after a reboot, does it ever re-occur on
the same guest?
You showed
vif-bridge:
https://gist.github.com/26ce1eea5a1db0ae26a6#file_vif_bridge.sh
It seems to be random, no pattern as far as we can tell. We've had
guests lose one, then the other after a reboot. I haven't noticed if it
has anything to do with Mac addresses. I'll check next time.
Yes, we have seen
I am having the exact same issue as described above, but using the
following:
* Ubuntu 10.10 (upgraded from 10.04, upgraded from 9.10, upgraded from 9.04
which was a fresh install).
* KVM (QEMU PC emulator version 0.12.5 (qemu-kvm-0.12.5), Copyright (c)
2003-2008 Fabrice Bellard)
* Linux alexo
Thanks @Alexander.
When vnet0 is the working device, then can vnet1 talk to the host at
least, or not even that?
It looks like you're using a custom kernel. Is there any chance of
trying with a stock kernel?
Actually I'm pretty sure your issue would be different from Jesse's.
Could you please
@Jesse,
are you still seeing this issue?
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https://bugs.launchpad.net/bugs/728519
Title:
Bridged Guests losing network connectivity under non-ubuntu Xen after
upgrade from 8.10 to
Yes.
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https://bugs.launchpad.net/bugs/728519
Title:
Bridged Guests losing network connectivity under non-ubuntu Xen after
upgrade from 8.10 to 10.04
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I actually custom-compiled the kernel in an attempt to mitigate the issue.
I used 2.6.35-27-generic when the problem first appeared.
Both virtual instances (tapped by vnet0 and vnet1) can always reach each
other, as well as the host.
As per your request, I will file a separate bug report.
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2.6.32-0206322611-generic was being used on this server.
Unfortunately, we just had another virtual server that *is* running
2.6.35-23-virtual and does not have the xen_* modules lose network
connectivity on one interface.
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So if I understand correctly, this does not in fact appear to be a bug
in the kernel?
Sorry if I've asked this before, but is there definately nothing in the
guest's syslog right before the connection is dropped?
I'm afraid I don't know enough about xen setups to be able to guess at
what might
I'm not sure where the bug lies at this point, to be honest.
There nothing in syslog before and after.
There is nothing different on the host between upgraded and installed
guests at all, and it appears this problem is occurring on KVM as well.
Xen is not the issue.
The problem not yet
Temporarily assigning to Chuck to see if he has any ideas pertaining to
Xen. Chuck, any insight you have would be greatly appreciated.
** Changed in: linux (Ubuntu)
Assignee: (unassigned) = Chuck Short (zulcss)
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Thanks, Jesse. Could you list precisely which kernel was actually
running?
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https://bugs.launchpad.net/bugs/728519
Title:
Bridged Guests losing network connectivity under non-ubuntu
We just had a guest lose networking. 'rmmod xen_netfront' caused the
other interface to go down, and I surmise removing the other module
would fail because of the attached devices:
# lsmod | grep xen
xen_netfront 14919 0
xen_blkfront8991 2
Turns out this
Thanks for filing this bug.
Have you tried doing 'rmmod xen_netfront xen_blkfront' on an upgraded
host?
I'm not familiar enough with Xen to know which interfaces do what, but
several of the interfaces on the host do have the same hwaddr. Do you
know whether that can be related? In particular,
10.04 Install procedure:
https://gist.github.com/26ce1eea5a1db0ae26a6#file_install
8.10 to 10.04 Upgrade procedure:
https://gist.github.com/26ce1eea5a1db0ae26a6#file_upgrade
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