Re: [Xen-users] Dummy ethernet device setup

["Dirk H. Schulz" <dirk.schulz@xxxxxxxxxxxxx>]

Philipp,

as far as I understand it a dummy device does not transport packets, but 
accepts them and sends them to /dev/null.
Your setup very much looks like the standard setup: Your dom0 and domUs 
are connected to a bridge, and Apache (with the IP of dom0) acts as a 
proxy for the domUs. In the place of the dummy xen automatically sets up 
a vif.
Is there any special reason why you want a dummy device in your setup?

Dirk

Philipp Jäggi schrieb:

> Hello you all out there
>
> Does anybody know the definite guide to create a dummy ethernet device?
>
> So, what I want to have is an ethernet device, without a physical link, or 
> so called a dummy device. My goal is to have apache with mod_proxy and 
> balancer running on peth0 in dom0. Apache is spreading my connection to 
> the backend domU's, where the webservices are running. The connection 
> between the dom's should go on dom0 over the dummy interface and they are 
> all connected over a bridge. Hope the following ascii-art explains it a 
> little bit better:
>
>                    ¦¦
> -------------------------------------------------------------
> |               peth0                   |
> |               DOM0                    |
> |                                       |
> |               tun0 (dummy dev)        |
> |                xenbr1                 |
> |----------------------------------------------------------     |
> |       eth0    |       eth0            |
> |       domU    |       domU            |
> | _____________|____________________|
>
>
> I tried with tun to setup the stuff, but I've got several problems. I 
> search a lot in the internet, but I didn't find a good documentation. So 
> my question is, how to setup cleanly such a dummy device. Any help or link 
> to documentation is welcome! Thanks a lot for your help
>
> bye Philipp
>
> ===============================================
> Philipp Jäggi
> SNCT Sandweiler
> bp 23
> L-5230 Sandweiler
>
> mailto: philipp [dot] jaeggi [at] snct [dot] lu
>  
>
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