Hi rsuraj,
I had overlooked the following sentence.
I thought that it is enabled by default.
"The auxiliary port is disabled by default."
Hence, I've set it up, I was able to use the aux port.
Thank you for your kindness very much.
Regards,
GENC
{primary:node0}
root> show configuration system ports
auxiliary type vt100;
{primary:node0}
root> show system users
node0:
--------------------------------------------------------------------------
5:11AM up 18:31, 2 users, load averages: 0.02, 0.03, 0.00
USER TTY FROM LOGIN@ IDLE WHAT
root u0 - Tue10AM - cli
root u1 - 5:11AM - cli
{primary:node0}
root>