Re: Packet loss between Xen machines

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Does dmesg show anything suspicious that might for example point to an 
overflowing connection tracking table or something similar?

Regards,
   Dennis

On 09/26/2011 10:17 PM, Aaron Linnen wrote:
> Pinging from one domU other domUs shows dropped packets, which is how we
> initially discovered something odd was going on. It also happens pinging to
> the domUs from other physical machines.
>
> netstat -i in dom0 shows dropped packets (TX-DRP) on the vif devices.
> Within the domUs it comes back with zeros.
>
> It only seems to happen under fairly heavy load.
>
> The machines in question are on the same bridge xen. That bridge has
> separate subnets and one domU is a router that routes between them (and
> performs LVS functions).
>
> Aaron
>
> On Mon, 26 Sep 2011 14:08:47 -0500, Nehemiah wrote:
>
>> what evidence do you have of packet loss? between the net and the
>> machines or between machines bridged together with xen?
>>
>> --
>> Nehemiah I. Dacres
>> Saint Louis University: Advanced Technology Group
>> Linux System Administrator
>> Sent with Sparrow <http://www.sparrowmailapp.com/?sig>
>>
>> On Monday, September 26, 2011 at 12:53 PM, Aaron Linnen wrote:
>>
>>> We are experiencing some packet loss between xen machines which we
>>> haven't seen before. Is this a problem anyone's run into before and/or
>>> has ideas on how to diagnose the issue?
>>>
>>>
>>> The setup is CentOS 5 xen-3.0.3-80.el5_3.3
>>>
>>> Aaron
>>>
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>>> CentOS-virt@xxxxxxxxxx <mailto:CentOS-virt@xxxxxxxxxx>
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>
>
>
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