RE: [Xen-users] IP of a running VM in XEN

[Bhasker C V <bhasker@xxxxxxxxxxxxx>]

Oh !

 I think we are left with only doing a unicast ping which
 is the only method to get to the Xen machines.

 But I found this which may solve (partially) your issue

 suppose your network is 10.1.1.0/24
 you can do
 nmap -sP 10.1.1.10/24 | grep -iB1  Xen

 this will give all IP addresses and mac address of Xen machines with the
  mac addresses of xen type (again if you chose not to change the default
  mac allocation of domUs)

 with the use of vifX number you can map it to your xen machine
 by looking at the mac address using ifconfig vifX.0

 PS: The nmap does a ping sweep so ... expect a lot of icmp packets in 
your network !
On Thu, 30 Apr 2009, Pallab Chakrabarty wrote:

> This would not yield my vm ip 10.1.1.130
>
> Even arp -n don?t print about the bridge it uses..
>
>
> phy2:~ # brctl show
> bridge name     bridge id               STP enabled     interfaces
> eth0            8000.0014c2e50258       no              peth0
>
> vif4.0
>
> phy2:~ # arp -n
> Address                  HWtype  HWaddress           Flags Mask
> Iface
> 10.1.1.11               ether   00:1O:09:D5:24:C8   C
> eth0
> 10.1.1.1                 ether   00:09:B7:3D:9A:C6   C
> eth0
> 10.1.1.90                ether   00:0F:29:85:82:8D   C
> eth0
> 10.1.1.80                ether   00:1S:09:D4:A4:FC   C
> eth0
> 10.1.1.21                ether   00:13:22:B1:1F:5B   C
> eth0
>
>
> You see there's no iface peth0 or vif4.0 got printed with arp ..
>
> But my vm is running in phy2 machine with 10.1.1.130 ip..
>
>
> Pls help ..
>
>
> - regards
>    Pallab
>
>
>
> -----Original Message-----
> From: Bhasker C V [mailto:bcv@xxxxxxxxx]
> Sent: Thursday, April 30, 2009 1:15 PM
> To: Pallab Chakrabarty
> Cc: Xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] IP of a running VM in XEN
>
> Classic question.
>
> The DomUs are like machines in the network and it is not
> easy to find the IP of the domU machines.
>
> Most of the times, the DomUs are connected to physical ethernet
> of Dom0 via bridge. So arp on the bridge must show the ip
> addresses in that machine.
>
> I usually do a
>
> ping -b 255.255.255.255
> which will make all the machines to reply. Once this is done, within a
> short period if we try to do a arp information
>
> arp -n
>
> you will get a list of ip addresses. The only problem is to sort out
> which IPs belong to the DomUs and which are from the other machines
> in the network. This is easily done by doing a grep for
> the MAC prefix of the xen MAC addresses (if you have used automatic
> allocation of MAC addresses to the network cards of domUs )
>
>
> On Thu, 30 Apr 2009, Pallab Chakrabarty wrote:
>
> >  
> >
> > Hi,
> >
> >  
> >
> > I want to know the IP of a running VM in XEN.. Is there any way to have
> > this without login to that VM..
> >
> > Any XEN tools ?
> >
> > - regards
> >    Pallab
> >
> >  
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