Re: Controlling allocation of ethernet devices and KVM

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On 26/11/09 10:16 PM, "Tait Clarridge" <tait@xxxxxxxxxxxx> wrote:

> On Fri, 2009-11-27 at 14:02 +1300, Steven Ellis wrote:
>> Running Centos 5.4 with KVM on a Dell R610 server and I'd like to
>> control which of the four ethernet interfaces are used for specific
>> tasks
>> 
>> My ideal configuration would be
>> 
>> eth0 - Host traffic only, no virtual guests. Used for guest mirroring
>> and management.
>> eth1 - NAT guest traffic only, no address for local machine and in
>> some environments in the same zone as eth0
>> eth2/3 - Allocated to two different bridge devices which might be in
>> separate network zones.
>> 
>> The configuration of eth2/3 is fairly simple, my issue is restricting
>> any NAT traffic to a specific ethernet devices, and ideally one with
>> no local IP.
>> 
>> Any ideas?
>> 
>> Steve
>> 
> 
> So if I have this right, at the basic level you wish to have:
> 
> - One interface for Host machine
> - Multiple interfaces for guest traffic
> 
> If your environment supports VLANs (802.1Q), might I suggest a trunk
> port on eth1 split up into different bridges to have the KVM guests go
> through to get on different VLANs/address spaces.
> 
> This is what I currently do for Xen and it works great. What kind of
> network setup to you have?

Could you please provide some pointers on how you accomplished this?  I've
been attempting to set up a similar configuration without success.

Thanks, 
  Kelvin


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