Re: [Xen-users] VM nic not taking IP address

["John A. Sullivan III" <jsullivan@xxxxxxxxxxxxxxxxxxx>]

On Thu, 2005-11-24 at 22:12 -0800, Alan Murrell wrote:
> I have a DomU as a firewall (using the Dom0 kernel).  I hid the three
> nics from Dom0 and assigned them to the firewall VM.  The firewall VM
> sees the three nics no problem.  Eth0 comes up and grabs an IP
> automatically from my DHCP server, however eth1 and eth2 are configured
> with static IPs but they do not come up with an IP:
> 
> Here is my 'ifconfig':
> 
> [root@fw01 ~]# ifconfig
> eth0      Link encap:Ethernet  HWaddr 00:E0:18:E1:A0:68
>           inet addr:192.168.10.252  Bcast:192.168.10.255
> Mask:255.255.255.0
>           UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:928 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:529 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:99207 (96.8 KiB)  TX bytes:104766 (102.3 KiB)
>           Interrupt:20
> 
> eth1      Link encap:Ethernet  HWaddr 00:00:D1:1C:0E:67
>           UP BROADCAST MULTICAST  MTU:1500  Metric:1
>           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
>           Interrupt:23 Base address:0xc800
> 
> eth2      Link encap:Ethernet  HWaddr 00:00:D1:1C:0E:68
>           UP BROADCAST MULTICAST  MTU:1500  Metric:1
>           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
>           Interrupt:23 Base address:0xc400
> 
> 
> I have also tried setting my eth1 and eth2 to DHCP and plugging each one
> into my network, but they will not pick up an IP address from my DHCP
> server.
> 
> When these cards are unhidden from Dom0, they work no problem (IPs show
> up on them, can get IP address from DHCP server, etc.)
> 
> I am not sure what the problem may be, and would appreciate any
> suggestions on where else to check?
> 
> TIA.
> 
<snip>
I'm by no means a Xen expert but I would look at a couple of areas.  I
believe there is a statement in the domain configuration file regarding
the number of NICs in the domU.  It defaults to one.  Have you set it to
three?

I'm not sure but I think the device does need to be brought up in dom0
even if no IP address is bound to it.  Has it been brought up and the
bridges created? Again, I'm not sure about that but I think I recall
having to bring the physical device up (ifconfig eth? up), create the
bridge and add it to the bridge before I could successfully use it in a
domU.  Hope this helps - John
-- 
John A. Sullivan III
Open Source Development Corporation
+1 207-985-7880
jsullivan@xxxxxxxxxxxxxxxxxxx

If you would like to participate in the development of an open source
enterprise class network security management system, please visit
http://iscs.sourceforge.net


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