Re: [Xen-users] Seeing the IP addresses of domUs from dom0

[Ralf Schmitt <ibm.tivoli@xxxxxxxx>]

strange ... here is what I can see on my Notebook:

[root@tivoli VM]# arp -n
Address                  HWtype  HWaddress           Flags Mask
Iface
172.20.0.2               ether   00:16:3E:6F:97:1B   C
xenbr0




There is only one VM on it (172.20.0.2) and I can't see
the interfaces of dom0, because this system is connected
to the internet with a PCMCIA UMTS card (ppp) and the 
onboard network interface is not activated. 

[root@tivoli ~]# ifconfig
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:132 errors:0 dropped:0 overruns:0 frame:0
          TX packets:132 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:40104 (39.1 KiB)  TX bytes:40104 (39.1 KiB)

ppp0      Link encap:Point-to-Point Protocol
          inet addr:10.129.193.159  P-t-P:10.64.64.64
Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:400  Metric:1
          RX packets:14416 errors:2578 dropped:0 overruns:0 frame:0
          TX packets:14259 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:5371717 (5.1 MiB)  TX bytes:947051 (924.8 KiB)

vif1.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:30 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1788 (1.7 KiB)  TX bytes:916 (916.0 b)

xenbr0    Link encap:Ethernet  HWaddr 36:8B:F9:95:5C:E8
          inet addr:172.20.0.1  Bcast:172.20.255.255
Mask:255.255.255.255
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:27 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1284 (1.2 KiB)  TX bytes:916 (916.0 b)


The ppp interface has no MAC address ... so this is OK

I use NAT on it and I don't have access to the server in my 
company at the moment ... maybe I was wrong ... I will have
a look at it tomorrow.


My "xm list --long" is in the attached file. It was to long to 
add it to the mail.


I have also added the kernel configuration files of dom0 and 
domU.
 

Regards

  Ralf


Anand Gupta wrote:
> On 2/10/06, Ralf Schmitt <ibm.tivoli@xxxxxxxx> wrote:
>         with a MAC address entry in the domU configuration file it
>         would
>         also be possible to find the IP address in the arp table with
>         the
>         command:
>         
>            arp -n
>         
>         on dom0 if you don't want to add each domU to the dhcp
>         configuration. 
>         
>         You should also have a look at the tool "arpwatch". It sends
>         you a mail
>         if a new address appears.
>         
>         http://rpmseek.com/rpm-pl/arpwatch.html?hl=de&cx=857:A:80
>         
>         Maybe this works only in a routed xen network ...
> 
> This doesn't work on my routed setup
> 
> arp -n
> Address                  HWtype  HWaddress           Flags Mask
> Iface 
> 192.168.1.3              ether   00:09:5B:E6:3E:79   C
> eth0
> 192.168.1.1              ether   00:A0:C5:9B:AE:1D   C
> eth0 
> 192.168.1.240            *       *                   MP
> eth0
> 
> The ip 192.168.1.240 is of a domU and the HWaddress has a * in it. 
> 
> 
> -- 
> regards,
> 
> Anand Gupta

Attachment: dotConfig-dom0
Description: Text document

Attachment: dotConfig-domU
Description: Text document

Attachment: xm_list.txt
Description: Text document

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