[ovirt-users] Windows Networking Issues -

[Matt Wells]

All networking within oVirt seems fine.  I can ping devices on other
networks, I'm able to use a squid proxy on the same network with no
issues.  I'm able to use Terminal Services from another VM in oVirt.  One
oddity is when I first boot, I'm able to hit Google and search for a Dog.
On my 2nd search it starts to timeout.

All and all ip networking seems to be configured well.  The DG lives
outside of oVirt and I'm always able to ping it; even increasing the packet
size.

MTU size is 1500 and matches the VLAN MTU in oVirt; the bond0 is set to set
to an 9000 MTU.
EM1 and EM2 are in bond0 and show no framing errors.

On Wed, Nov 25, 2015 at 1:30 AM, Yaniv Kaul <ykaul at redhat.com> wrote:

> On Tue, Nov 24, 2015 at 11:17 PM, Matt Wells <matt.wells at mosaic451.com>
> wrote:
>
>> Hi all, I have a question about Windows VMs and a networking issue I'm
>> having.
>>
>> Here's the setup -
>> * oVirt - 3.5.1.1-1
>> * Hypervisors are CentOS 6.7 box with 2 NICs in bond0 'mode=4 miimon=100
>> lacp_rate=1'
>> * On bond0 I have a few networks using vlan tagging.
>> * Networks are 5,10,15,20 - All on an external switch
>>
>> Network 15 has a Windows 2012 R2 server and a CentOS 6.7 server on it.
>> The rest of the networks have a few linux.
>>
>> Every linux box on every network is happy.  However any and all Windows
>> boxes I bring online are incapable of patching or hitting the web.  I
>> pointed the Windows box to the linux box next to it as a proxy (after
>> installing squid on it)  When I do that the Windows box has no issues at
>> all; it's only when he's attempting to leave on his own.
>>
>> On my firewall I put in a 'permit any any' on the M$ box IP however all I
>> see is tcp resets in PCAPs,
>>
>
> Can you verify basic IP networking is working correctly for those VMs?
> For example, we've established that they can get to the Linux VMs - how?
> Are they on the same subnet? Or do they go through their default gateway?
> Without knowing the IP topology, if the Linux machines were on the same
> subnet as the Windows one, and the Windows machine fail to get to their
> default gateway for some reason, this may perfectly explain the issue.
> Y.
>
>
>>
>> I've been playing with for some time but can't seem to find the issue.
>> It would be one thing if everything on the 15 was bad but the linux box on
>> the network is fine. Here's the rub, I'm 99.999% sure this used to work.
>>  gggrrr...
>>
>> Any assistance anyone can offer would be amazingly appreciated.
>>
>> Thank you for taking the time to read this.
>>
>>
>> _______________________________________________
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>> http://lists.ovirt.org/mailman/listinfo/users
>>
>>
>
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