On Fri, 13 Jul 2018 04:01:40 -0000 (UTC), Arlen Holder
wrote:

NOTE: Yes I could figure out how to use tcpdump & wireshark to sniff out
the packets, but it's crystal clear now what is happening since simply
eliminating the outdoor transceiver temporarily solved the problem
instantly.

The outdoor transceiver is blocking the SMB NETBIOS broadcast packets!

Meanwhile, sane people are left wondering what manner of
misconfiguration led to you having an outdoor transceiver *inside* your
LAN. Not connecting your LAN to the Internet, but connecting one part of
your LAN to another part of your LAN.

I'm always amazed at what people come up with when they don't really
understand how to do something. I'm being serious. Sometimes the
creativity is just something to behold.