Re: [Xen-users] mac spoofing

["Heiko.Garrelfs" <Heiko.Garrelfs@xxxxxx>]

Thanks for this answer, I had not thought about stp before.

But as far as I understand, STP is turned off by default in the
network-bridge script ( ca line 160 in function create_bridge()

Is there another place to disable it ?




Javier Guerra wrote:

Javier Guerra wrote:
> On Friday 19 May 2006 7:06 am, Heiko.Garrelfs wrote:
>> ( btw: at that point,  I had not configured any domU's )
>>
>> From the Xen Docs I understand that the bridge gets the mac from eth0
>> which is then diabled.
>>
>> So - I dont understand where the 'spoofed' Mac is coming from - at least
>> as long I have no domU running.
> 
> maybe the bridge is generating some STP (spanning tree protocol) events at 
> setting up time.  the hoster's switch interprets it as if you've put your own 
> switch at the given port (it would be a correct interpretation, btw).  try to 
> disable STP (brctl stp br0 off) before adding peth0 to it.
> 
>> ( I dont want to use NAT: I have two IPs ( only one NIC )for the Server
>> and want the dom0 and one domU to run on one IP each. )
> 
> make sure that you're allowed to put two machines at that port.  if you don't 
> use NAT or routing you'll have to use two MACs at a single port.  maybe 
> you'll have to ask them to register your new MAC to add it to their bridging 
> table.
> 
> 
> 
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