Re: [Xen-users] Need help setting up guest's networking

[Yevgeniy Goldberg <thegoldberg@xxxxxxx>]

Hi Tim,

I've made some progress with VM networking.
My initial issue was that the forcedeth driver was not loading as it  
should.
Now that is fixed.
My next problem is - how to make my guest VMs recognize the second  
physical NIC (eth1)
Ideally, I would like to have 2 network interfaces available to each  
guest - one for Internet and one for internal network.
The Internet part seem to work now.
I've tried your suggestion and created a second bridge.
So far I could not make it to work.
Please, let me know what information I could provide to make this work.

Best regards,

-Eugene
On Apr 29, 2007, at 11:47 AM, Tim Post wrote:

> On Sun, 2007-04-29 at 10:53 -0500, Yevgeniy Goldberg wrote:
> > My physical eth1 is currently unused.
> > It may be a good idea for me to use that in association with xen  
> > bridge.
> > How do I make xen bridge to use eth1 instead of eth0?
> > Once I do that, I should be able to assign a local IP to it without
> > loosing Internet connectivity for Dom0.
> > Then I will follow the rest of your plan.
> you would do that with ifconfig and brctl, see the functions
> in /etc/xen/scripts/* for a better blow by blow of how to accomplish
> (manually) the stuff that Xen does.
>
> This should get you going for a test :
>
> brctl addbr brtest
> brctl stp brtest off
> brctl setfd brtest off
>
> ip link set brtest arp off
> ip link set brtest multicast off
>
> Now, use ifconfig to assign the static IP / netmask to testbr like you
> would any other network interface.
>
> Finally,
>
> brctl addif testbr eth1
>
> At this point, you have enslaved eth1 to brtest. You would then  
> need to
> specify brtest to your dom-u in the bridge= part of the vif[] array in
> its configuration file.
>
> Bridged networking is a big vitamin to swallow if your not used to it,
> so don't get discouraged over it. Many seasoned GNU/Linux  
> administrators
> draw a blank on it simply because they have never had to bother  
> with it
> before.
>
> Let the list know how it goes. If you eliminate the DHCP server as the
> cause (i.e. test bridge is no go too), I'm sure someone else can help
> you pick up on nailing this down. I'm off to 24 hours of R&R where  
> there
> is no electricity, much less computers :)
>
> Best,
> --Tim

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