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From Rafael Fonseca <rsafons...@gmail.com>
Subject Re: Regular total loss of connectivity
Date Mon, 01 Jun 2015 17:42:23 GMT
There are also a few kvm bugs which could be related, what kernel and
qemu-kvm versions are you running?

Rafael

On Mon, Jun 1, 2015 at 7:23 PM, Simon Weller <sweller@ena.com> wrote:

> What does arp show you on the VR when this occurs?
> Can you isolate this VR to a different physical host and upstream switch?
> If you leave a ping going to some external ip (e.g. 8.8.8.8) from the VR,
> do you still lose connectivity?
>
> ________________________________________
> From: Nux! <nux@li.nux.ro>
> Sent: Monday, June 1, 2015 12:15 PM
> To: users@cloudstack.apache.org
> Cc: dev@cloudstack.apache.org
> Subject: Re: Regular total loss of connectivity
>
> Ok, no luck with e1000 either, connectivity is lost after 4 hours (14400
> sec). That can't be random.
>
> Any ideas?
>
> --
> Sent from the Delta quadrant using Borg technology!
>
> Nux!
> www.nux.ro
>
> ----- Original Message -----
> > From: "Nux!" <nux@li.nux.ro>
> > To: users@cloudstack.apache.org
> > Cc: dev@cloudstack.apache.org
> > Sent: Monday, 1 June, 2015 14:35:09
> > Subject: Re: Regular total loss of connectivity
>
> > Nope, it's a regular, non-redundant VR.
> >
> > I've switched to using e1000 instead of virtio, waiting for a few hours,
> so how
> > it pans out. :-)
> >
> > --
> > Sent from the Delta quadrant using Borg technology!
> >
> > Nux!
> > www.nux.ro
> >
> > ----- Original Message -----
> >> From: "Simon Weller" <sweller@ena.com>
> >> To: dev@cloudstack.apache.org
> >> Cc: "Cloudstack Users List" <users@cloudstack.apache.org>
> >> Sent: Monday, 1 June, 2015 13:32:26
> >> Subject: Re: Regular total loss of connectivity
> >
> >> Is this VR in a redundant pair? If so, does stopping the master and
> allowing the
> >> slave to take over allow the flow of traffic to resume?
> >>
> >>
> >> ________________________________________
> >> From: Nux! <nux@li.nux.ro>
> >> Sent: Monday, June 1, 2015 6:45 AM
> >> To: dev@cloudstack.apache.org
> >> Cc: Cloudstack Users List
> >> Subject: Re: Regular total loss of connectivity
> >>
> >> Thanks Simon,
> >>
> >> link up/down has not helped, setting tso etc off on the link has not
> helped
> >> either.
> >> Connectivity is lost as usual after ~4 hours.
> >>
> >> I found some suggestions to try and use the e1000 nic instead of
> virtio, will do
> >> that.
> >>
> >> Lucian
> >>
> >> --
> >> Sent from the Delta quadrant using Borg technology!
> >>
> >> Nux!
> >> www.nux.ro
> >>
> >> ----- Original Message -----
> >>> From: "Simon Weller" <sweller@ena.com>
> >>> To: "dev" <dev@cloudstack.apache.org>, "Cloudstack Users List"
> >>> <users@cloudstack.apache.org>
> >>> Sent: Sunday, 31 May, 2015 22:36:56
> >>> Subject: Re: Regular total loss of connectivity
> >>
> >>> If you ifdown the interface on the router and then ifup it again, does
> the arp
> >>> problem resolve itself?
> >>>
> >>> We've seen a similar issue before caused by malicious/heavy traffic
> related to
> >>> this bug:
> >>>
> >>> https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/997978
> >>>
> >>> - Si
> >>> ________________________________________
> >>> From: Nux! <nux@li.nux.ro>
> >>> Sent: Sunday, May 31, 2015 4:25 PM
> >>> To: dev; Cloudstack Users List
> >>> Subject: Regular total loss of connectivity
> >>>
> >>> Hi,
> >>>
> >>> Following a power cut, one of my cloudstack deployments is having a
> really weird
> >>> problem that I cannot seem to solve on my own.
> >>> Every 3 hours all the public IPs on the VR stop responding from the
> Internet.
> >>> From the VR they are of course all reachable.
> >>> In the same VLAN as the public IPs there is another physical server,
> this one
> >>> can also access the VMs on their IPs just fine.
> >>>
> >>> The provider has not found the problem and hints at problems with the
> cloud
> >>> platform, however cloudstack worked just fine until the power cut, not
> to
> >>> mention the problem persists through HV and ACS upgrades.
> >>>
> >>> I'm thinking network side arp issues or something like this, alas I am
> not that
> >>> good with network stuff and don't have access to it anyway.
> >>>
> >>> If I reboot the VR once or twice the IPs start working again and the
> VMs are
> >>> accessible from the internet.
> >>>
> >>> Ideas?
> >>>
> >>> Env: CentOS 6, KVM, ACS 44 to 4.5.1, Adv zone
> >>>
> >>> Lucian
> >>>
> >>> --
> >>> Sent from the Delta quadrant using Borg technology!
> >>>
> >>> Nux!
> > > > www.nux.ro
>

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