Re: [Xen-users] Xen reporting wrong network card. WAS:Xen Networking at 100mb instead of 1000

[Javier Guerra Giraldez <javier@xxxxxxxxxxx>]

On Tuesday 10 June 2008, Eredicator X wrote:
> From: "Joseph L. Casale" <JCasale@xxxxxxxxxxxxxxxxx>
> >You noticed it running @ 100mbps because thatâs all an 8139 in any
> > variation can run!
>
> Hmm I should have checked that first. Thanks, but is it possible that Xen
> is detecting or telling the domU host that it is this card because it
> detects a realtek but cant determine what type it is so it uses the most
> compatiable driver.  The onboard card is a Realtek 8111B chip (10/100/1000
> Mbit) which I am using for this server.


Xen doesn't have anything to do with your card. it doesn't have any drivers, 
nor manages it in any way.  What you 'see' in DomU is an emulated card, 
usually a RealTek 8139, or an Intel e1000, no matter what you physically have 
on the machine.

this emulated card doesn't talk to hardware, so it could be any kind of card. 
also, since it really doesn't manage a network wire, it can work at any 
speed; no matter what does it say.

try to benchmark it.  probably won't be a speed demon; but quite possibly 
would get more than 100 Mb/sec


-- 
Javier

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