Re: [Xen-users] First Time User: Networking, and my best option.

[Peter <peter@xxxxxxxxxxxxxxxx>]

On 02/11/11 12:49, Vance, Derek CEO wrote:
> Ok so I am very new to Xen, and from other people whom I work with say
> that the networking is the hardest part of setting it up.
> 
> Currently I own a dedi with 8 IP's and 1 Nic. Currently its running debian.
> I have setup Xen on the box and all the guest play nice, however
> getting them to connect to the internet is a big issue.
> 
> Sometimes they drop out after a few, sometimes I can't get them to
> connect at all. So I am looking to start from square one and get this
> setup networked properly so that I can start using my vm servers.
> 
> a few addtl details: My data center has my box routed and only a
> single mac mapped to an ip can access the internet and vice versa. I
> have already tried having them change the mac on the router but it
> completely shuts out the connection. At the moment I am running the vm
> on a default bridged connection and if i ssh to dom0 and ping the ip
> assigned to it it returns an ack, and if i ping dom0 from within domU
> (Windows or Linux on the domU) it returns ack. but if i ping the
> outside from the domU or i try to ping the domU from outside, it gives
> no response.

Right, this has to do with the mac address mapping.  I think you can
work around this issue by rewriting the mac address on outgoing packets.
 I think this can be done with ebtables but I'm not entirely sure.


Peter

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