From the auth log at the destination:
Failed password for <user> from <ip> port <no> ssh2


On Thu, Mar 24, 2016, 3:50 PM Michal Privoznik <mprivozn@redhat.com> wrote:
On 23.03.2016 14:47, nidhi d wrote:
> I tried using tunnelled mode for vm migration, but migration failed with
> the error
>
> Permission denied(publickey,password):Connection reset by peer
>
> I have enabled passwordless ssh login at the destination. Also i am able to
> connect  to the destination using using qemu+ssh.

Maybe the destination ssh is denying spawning a command? Libvirt spawns
a netcat process to pass data through a unix socket to ssh tunnel.
What's the error message you see on the destination?

Michal