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[Xen-users] Xen live migration: from where is the ARP sent?

To: Xen User-List <xen-users@xxxxxxxxxxxxxxxxxxx>, xen-research@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Xen live migration: from where is the ARP sent?
From: Virajith Jalaparti <virajith.j@xxxxxxxxx>
Date: Fri, 11 Mar 2011 17:48:19 -0600
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I was hoping someone could help me out with a question I had about the live migration of Xen. I am trying to perform live migration of a VM using Xen 3.4.3. When paravirtualization is used, a gratuitous arp is sent out after the VM is restored at the new location (I did not find such an arp being sent when the VM is fully virtualized). Is this arp sent out by xen (the hypervisor) or the modified operating system? If the arp is sent by xen, which part of the xen code (which file?) actually sends out this arp? If the arp is not sent by xen, is it possible to send an arp from xen rather than the OS? I think we would require to know the IP address and the MAC address of the VM for this purpose.


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