[Users] OpenVZ on EL6 - weird network issue

Pavel Odintsov pavel.odintsov at gmail.com
Sat Dec 27 13:39:00 PST 2014

Hello, folks!

Did you tried open-v-switch instead standard Linux bridges?

I working with openwswitch on many servers and everything working
perfectly now.

On Sun, Dec 28, 2014 at 12:21 AM, Michael Stauber <mstauber at blueonyx.it> wrote:
> Hi Scott,
>> [...] almost always it was inside of a commercial datacenter.
> Yeah, it's in a large datacenter as well.
>> The cause of the problem seemed to be some upstream routing
>> device that was periodically dropping ARP table entries for
>> the containers.
> That is indeed interesting. Well, I guess there is only one way to find
> out. I'll set up a cronjob as suggested to do periodic arpseeds. It sure
> won't hurt.
> So far we tried this here:
> http://forum.proxmox.com/threads/8301-OpenVZ-Containers-lose-internet-connection-%28VLAN-venet%29
> TL;DR:
> echo 2 > /proc/sys/net/ipv4/conf/br0/rp_filter
> That sounded good on paper, but just 20 hours later we had the next outage.
> The OpenVZ wiki also pointed out this here ("Bridge doesn't forward
> packets"):
> http://openvz.org/Bridge_doesn%27t_forward_packets
> Yet I'm not sure how applicable that might be to us. I noted down the
> current status of /proc/sys/net/bridge/* and will compare it with what
> it'll be during the next loss of connectivity.
>> I'd like to hear more once you get it figured out.
> Sure, I'll post follow ups then. Likewise: If you have any other ideas
> or suggestions, then I'd love to hear them.
> --
> With best regards
> Michael Stauber
> _______________________________________________
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> Users at openvz.org
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Sincerely yours, Pavel Odintsov

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