Re: [Xen-users] qemu-ifup error (was: network-route and vif-route setup help)

[William Wagner <will_wagner@xxxxxxxxxxxx>]

On 04/10/2009 12:49, Will Wagner wrote:
> Hello,
>
> I am trying to configure a hosted machine to run a number fo virtual
> machines. The DomU is CentOS 5 with Xen 3.0.
>
> I have to use routed networking as the ISP has set the switch to
> disconnect the port if it receives traffic from any other MAC. My
> situation is identical to this posting:
> http://lists.xensource.com/archives/html/xen-users/2006-03/msg00725.html
>
> I have followed the suggestion in that thread (See this post for what he
> got to work:
> http://lists.xensource.com/archives/html/xen-users/2006-03/msg00949.html)
> and am running the domU with:
>
> vif = [ "ip=domU_IP_HERE,bridge=virbr0" ]
> ip = "domU_IP_HERE"
> netmask="255.255.255.255"
> gateway="10.255.255.1"
>    
I have looked at this some more and realised the problem is with the line:

vif = [ "ip=domU_IP_HERE,bridge=virbr0" ]

I do not want the interface to be connected to the virtual bridge. 
Looking at all the examples on the net it would appear that I should not 
specify a bridge at all.
However if I start the interface with

vif = [ "ip=domU_IP_HERE" ]

Then my virtual machine does not start. In /var/log/qemu-****.log I see:

domid: 33
qemu: the number of cpus is 1
Watching /local/domain/33/logdirty/next-active
/etc/xen/qemu-ifup: could not launch network script
Could not initialize device 'tap'

The problem is that it is trying to call brtctl between xenbr0 and the 
vif. The problem is that for a routed network there is no xenbr0 so it 
returns an error.
What bridge should be specified when using a routed setup? Is it still 
correct that it calls qemu-ifup at all?
Thanks

Will


--
------------------------------------------------------------------------
Will Wagner                                     will_wagner@xxxxxxxxxxxx
Development Manager                      Office Tel: +44 (0)20 7371 2032
Carallon Ltd, Studio G20, Shepherds Building, Rockley Rd, London W14 0DA
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