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From Simon Weller <swel...@ena.com>
Subject Re: Regular total loss of connectivity
Date Mon, 01 Jun 2015 17:23:13 GMT
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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