Samsung SCX-4720 problem

Hi,

I have MT 2.9.50 on x86 machine.
I have this IP-based printer in my network.
I use hotspot functionality and static dhcp leases.

The printer is added to the bypassed pool,
and has static IP - .253/24
the pool is: .30-16.

Everything works fine, till the printer gets unreachable occasionally
with no clear reason. It can be accessed again after few pings
from the router’s cli. Note: it does not help, when ping is typed from cmd
at any workstation.

Any ideas? what else me be the factor in this case?

Best Regards,

Stoned.