Re: [Xen-users] Emulating Multiple NIC cards on Guests

[Viswanath T K <viswanath.t@xxxxxxxxxxx>]

Hi 

I tried out whatever you have and others have suggested but nothing has
worked out yet.

I shall elaborate on the steps I have undertaken on Fedora x86 64bit.

1.  Installed xen, kernel-xen , virt-manager
2.  Rebooted on xen kernel.
3.  I have 3 NIC cards and for all of them I have assigned Static IPs.
4.  When I do an ifconfig I get details of eth0,1,2 ,lo and virbr0. I
dont see xenbr0.
5.  Are virbr0 & xenbr0 the same ?
6.  I dont see any file in /etc/xen/<guest name> so as to add vif=[], Is
this file auto-generated when we create a guest using virt-manager.

7.  I created a file in /etc/xen/<guest name> named guest1 and edited
vif as you have mentioned and created guest using "xm create -c <guest
name>
This also failed giving the error, "Device 0  cannot be connected.Hot
plug scripts failed ( I dont remember the exact error )"

Help is needed on this.


Thanks
Viswanath 




On Wed, 2008-02-06 at 19:49 +0530, Sadique Puthen wrote:
> Viswanath T K wrote:
> > Hi All,
> >
> > I have a x86 64bit Machine on which I run fedora 7 64bit.
> > I have 3 NIC cards on the machine. Now I want to create 2
> > paravirtualised guests with fedora 7 64 bit as the OS.
> > My objective is I want the guests also to emulate or show the 3 NIC
> > cards which are present on the host or dom0 . At present I am using
> > virt-manager to create the guests and on doing the regular process, the
> > 3 NIC cards are not shown on the guests.
> >   
> 
> The default xen dom0 configuration creates only a single bridge and the 
> default guest configuration only creates a single virtual ethernet 
> interface on the guest. Solution for you would be something below.
> 
> - In /etc/sysconfig/network-scripts of dom0 , Configure eth0, eth1 and 
> eth3 with appropriate network details.
> 
> - Edit /etc/xen/xend-config.sxp, comment out Line 91 by putting a # in 
> the beginning of the line and add the below line after that.
> 
> (network-script network-custom)
> 
> - Crate /etc/xen/scripts/network-custom with the below contents in it 
> and give it 755 permission.
> 
> #!/bin/bash
> /etc/xen/scripts/network-bridge $1 netdev=eth0 bridge=xenbr0 vifnum=0
> /etc/xen/scripts/network-bridge $1 netdev=eth1 bridge=xenbr1 vifnum=1
> /etc/xen/scripts/network-bridge $1 netdev=eth2 bridge=xenbr2 vifnum=2
> 
> - Reboot your system.
> 
> - Now you should have xenbr0, xenbr1 and xenbr2 configured properly on 
> your host system. Run "brctl show" to see details.
> 
> Now if you want to start a guest with three virtual interfaces, Edit the 
> guest configuration file in /etc/xen/<guest name> and change vif= 
> parameter as below.
> 
> vif = [ 
> "mac=00:16:3e:7b:0e:a4,bridge=xenbr0,script=vif-bridge","mac=00:16:3e:7b:0e:a5,bridge=xenbr1,script=vif-bridge"
>  
> ,"mac=00:16:3e:7b:0e:a6,bridge=xenbr2,script=vif-bridge"]
> 
> This would create three virtual ethernet interfaces - eth0, eth1 and 
> eth2 - in the guest where eth0 would be bridged to xenbr0, eth1 to 
> xenbr1 and eth2 to xenbr2. Then configure these virtual interfaces in 
> the guest as you usually do with a physical system. If eth0, eth1 and 
> eth2 in dom0 are connected to separate subnets and if you configure 
> these three virtual ethernets in the guest to obtain their ip addresses 
> from dhcp, then they should have obtained an ip address from the 
> respective dhcp servers when you restart network service in the guest. 
> Please make sure that the mac address you assign is unique.
> 
> The above vif = entry is for a para-virtualized guest. If it's a fully 
> virtualized guest, it should be as below.
> 
> vif = [ 'type=ioemu, mac=00:16:3e:04:98:04, bridge=xenbr0','type=ioemu, 
> mac=00:16:3e:04:98:05, bridge=xenbr1','type=ioemu, 
> mac=00:16:3e:04:98:06, bridge=xenbr2' ]
> 
> --Sadique
> 
> >
> > Can somebody help me on how to go about this .
> >
> >
> > Thanks ,
> > Vishu
> >
> >
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
> >
> >   


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