[Xen-users] Xen with Multiple NIC as a logical router

[Dimitrios Kalogeras <D.Kalogeras@xxxxxxxxxxx>]

Hi *,

My sincere apologies for cross posting in the mailing lists.

I am evaluating the case of using XEN as a logical router.

http://www.cs.ucl.ac.uk/staff/M.Handley/papers/xen-vrouters.pdf

In the conclusions section it is mentioned

"  CPU saturation is a main feature of PC-based virtual routers, and
that to avoid context switching overheads, the virtualization platform
(e.g. Xen) so all forwarding is handled in the privileged domain. In
other words, domUs should only host the control (slow) path of its
associated virtual router, while the corresponding forwarding
should be âmigratedâ to dom0. "


I am considering the case to provide every DOMU a
separate physical port. I know that this solution does not scale but do
you believe that such a choice would limit the CPU overhead caused by
the copying functionality between the DOMU and DOM0 ?

Kind regards,
Dimitris




-- 
--
Dimitrios K. Kalogeras

Electrical Engineer, Ph.D.
Network Engineer
NTUA/GR-Net Network Management Center
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pub   1024D/0E421B50 2007-01-17 [expires: 2008-01-17] Dimitrios
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