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I have a Ubee cable modem (DOCSIS 3.0) which also serves as a wired/wireless router and DHCP server. I have devices which are on the LAN and receiving addresses from the Ubee that I can't ping from other devices also on the LAN.
Example:
- Computer A (static IP 192.168.0.50 wired connection)
- Computer B (DHCP IP 192.168.0.83 wireless connection)
- Computer C (static IP 192.168.0.203 wireless connection)
- Ubee (static IP 192.168.0.1)
Results:
- Computer A can ping Ubee and Computer C (Can't ping B)
- Computer C Can ping Computers A and B and Ubee
- Ubee can ping B and C, but not A which is wired to the Ubee and shows up on the client list
(Computer B is a microcontroller and is working fine with MQTT)
Hope I have explained this well enough. It's driving me crazy. Is it something about the Ubee, something dumb I'm doing? Thanks for any help. Bob
The ARPs show what you would expect; unreachable IP addresses are not listed. I don't think the problem is not related to wireless; the main failure (IMHO) is that of the Ubee router not to be able to ping a wired machine which it lists as a client. – Bob Sculley – 2018-05-28T05:22:09.947