I have made all these changes in my Ubuntu desktop. I have also enabled passwordless login for ssh at destination. But still, everytime i run into the same problem.

On Thu, Mar 24, 2016, 4:05 PM Michal Privoznik <mprivozn@redhat.com> wrote:
On 24.03.2016 11:23, nidhi d wrote:
> From the auth log at the destination:
> Failed password for <user> from <ip> port <no> ssh2

There's your answer. Libvirt really requires pubkey instead of passwd auth.

http://wiki.libvirt.org/page/SSHSetup

Michal