Re: 8 NIC limit

[Brian Jackson <iggy@theiggy.com>]

  On 10/5/2010 9:48 AM, linux_kvm@proinbox.com wrote:
> Hello list:
>
> I'm working on a project that calls for the creation of a firewall in
> KVM.
> While adding a 20-interface trunk of virtio adapters to bring in a dual
> 10GB bond, I've discovered an 8 NIC limit in QEMU.
>
> I found the following thread in the list archives detailing a similar
> problem:
> http://kerneltrap.org/mailarchive/linux-kvm/2009/1/29/4848304
>
> It includes a patch for the file qemu/net.h to allow 24 NICs:
> https://bugs.launchpad.net/ubuntu/+source/qemu-kvm">qemu-kvm/+bug/595873/+attachment/1429544/+files/max_nics.patch
>
> In my case I want to attach 29, and have simply changed line 8 to 30
> from 24.


I'd guess you'll bump into a pci device number limit (I believe it is 32 
at the moment).


> This will be the first patch I've ever had to do, and so far my internet
> search yields results that don't seem to apply.
>
> Would someone like to recommend a pertinent tutorial?
>
> Many thanks
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