Re: [Xen-users] please explain to me the networking of Xen & Xen guests

[Rudi Ahlers <Rudi@xxxxxxxxxxx>]

Sadique Puthen wrote:
> Rudi Ahlers wrote:
> > Hi all
> >
> > I'm rather new to Xen, and want to understand the networking behind it.
> >
> > Let's say my server has the following IP addresses: 192.168.10.10/24 
> > - 192.168.10.20/24 and these are all setup on the same NIC, as eth0, 
> > eth0:1, eth0:2, etc etc.
> > Do I assign a static IP address to a Xen guest from this pool? And 
> > will this then be bridged, or how does it work?
> > Or do I rather un-assign the IP address(es) in question, and just set 
> > them up in the Xen guest?
> Yes, You need to unassign these ips from dom0 and set them up in the 
> Xen guest.
Ok, so the main machine will only have 1 or 2 IP's for itself, and the 
rest will be assigned to the VM's directly, no bridging?
> > Lastly, if I had mrtg / munin / Nagios on the main server, who will 
> > it be able to graph each Xen guest's traffic individually?
> I think you can do this by monitoring traffic through the vifx.x 
> interface which handles the network traffice for the guest.
I saw the vifx.x interfaces, but they don't have IP's:

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
         UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
         RX packets:61077 errors:0 dropped:0 overruns:0 frame:0
         TX packets:75812 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:18054893 (17.2 MiB)  TX bytes:44011369 (41.9 MiB)

vif35.0   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
         UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
         RX packets:7 errors:0 dropped:0 overruns:0 frame:0
         TX packets:1569 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:32
         RX bytes:412 (412.0 b)  TX bytes:252960 (247.0 KiB)

vif36.0   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
         UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
         RX packets:2687 errors:0 dropped:0 overruns:0 frame:0
         TX packets:3294 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:32
         RX bytes:214391 (209.3 KiB)  TX bytes:359955 (351.5 KiB)


How would I know which one is which one?
> --Sadique
>
>
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--

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com
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