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xen-devel
RE: [Xen-devel] newbie question 1
> -----Original Message-----
> From: xen-devel-admin@xxxxxxxxxxxxxxxxxxxxx [mailto:xen-devel-
> admin@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Väino Vaher
> Sent: 24 November 2004 10:39
> To: xen-devel@xxxxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] newbie question 1
>
> I am very impressed with Xen 2.0!
> I have decided to consolidate some low-throughput domains onto a single
> Xen-based server. For that purpose I have installed multiple Nic's (one
> for each domain).I have searched the Archives of this discussion forum for
> examples on howto configure my system (1 Nic for each domain), but found
> nothing.I am too
> ignorant to even know how to make more than one nic visible indomain0.I
> there anyone out there that can give me some directions? Any
> papers onthe matter?(I guess that I'm not the only one; server
> consolidation seems
> like one ofthe primary goals of Xen).
> Thanks in advance!
First off, if you have low-throughput domains why do you want to assign a
physical nic to each VMs? By default a physical NIC driven by Dom0 should be
exported to via a virtual network interface to other VMs so that thy can share
the same NIC.
If you want to do a NIC per VM you need to do two things:
1) hide the NICs from dom 0: this can be done via a command line option to Xen,
pci_dom0_hide, described in the user manual. This basically prevents Dom0 to
start the device drivers for these NICs
2) you need to then assign the PCI devices the VMs via the domains config file
option pci= config option (again as per user manual).
The kernels you boot in these VMs need PCI enabled and obviously need to have
the network driver (so you might want to try the Xen0 kernels). To get any
reasonable performance you also need to take care that the NICs are on
different interrupt lines etc.
I would go for the shared NIC solution!
Rolf
>
> --
> "Wherever there is fun there is Java"
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