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From Sam Ceylani <>
Subject RE: Urgent : Xenserver Bond status change
Date Sun, 12 Apr 2015 18:09:01 GMT
Only explanation I can come up with (and I didn’t want to send this email because it could
be wrong) 
is since it is using VM's Mac address when registering with your switch 
It might be normal in an active-active bond on public interface, since new VM will have a
different MAC, or MAC changes on virtual switch
I might be wrong but I know it uses VM's mac address, like I said it is hard to pinpoint the
issue but could be the case...
When I have time I will trace packets on an active-active bond to better understand what's
going on...

-----Original Message-----
From: Fedi Ben Ali [] 
Sent: Sunday, April 12, 2015 1:59 PM
Subject: Re: Urgent : Xenserver Bond status change

Any idea ???

2015-04-12 0:13 GMT+01:00 Fedi Ben Ali <>:

> I've cheked my xensource.log and i have no trace of the issue(i keep 
> looking  ,my bond is on Active/Active. All my bonds are configured  on 
> two PIF that are connected to two switches thats why we are not using lacp.
>  Thx
> 2015-04-11 23:00 GMT+01:00 Sam Ceylani <>:
>> adding or removing a vm shouldn't affect management bond status 
>> unless when cloudstack makes an API call to xen toolstack for adding 
>> or removing vm somehow xenserver's management interface is bounced 
>> with that API call, I would check xenserver logs under /var/log and 
>> you can determine the reason, i doubt  it is related to cloudstack, 
>> it could also be a spanning-tree or lacp issue, check switch logs to 
>> determine if any of those sub systems on the switch causing this issue...what kind
of bond is this?
>> how is it configured on the switch,is it lacp or not basically?
>> Thanks,
>> Sam Ceylani, MBA
>> Computer Engineer
>> MisterCertified Inc.
>> 301 W. Platt St. Suite 447, Tampa, FL 
>> 33606<x-apple-data-detectors://0/0>
>> P 813<tel:813.264.6460>.264.6460<tel:813.264.6460> M 
>> 813<tel:813.416.7867>.416.7867<tel:813.416.7867>
>> F 800<tel:800.553.9520>.553.9520<tel:800.553.9520> E 
>> m>
>> On Apr 11, 2015, at 5:52 PM, "Fedi Ben Ali" < 
>> <>> wrote:
>> Hello ,
>> I'm working on a platform with many xenservers ,i'm using bonded 
>> interfaces for all the required cloudstack networks 
>> (management,guest,storage,public).
>> All my networks works fine except the public network ,each time i add 
>> or remove VM from a cluster ,the xenserver log shows" the status of 
>> the bond has changed ".
>> Did i miss some configuration ??
>> i 'll give my log output :
>> WB5: Bond status has changed,"3","The status of the eth2+eth3+eth4 bond
>> changed: 0/3 up (was 3/3)"    WB5: Bond status has changed,"3","The status
>> of the eth2+eth3+eth4 bond changed: 3/3 up (was 0/3)"
>>  WB1: Bond status has changed,"3","The status of the eth5+eth6+eth7 
>> bond
>> changed: 0/3 up (was 3/3)","
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