I am experiencing occasional, intermittent Internet connection dropouts from all LAN client nodes through my WAN connection. They usually last less than a minute, but occur at what appear to be random times of the day. I cannot say if they are concurrent with Internet access events because I have a mail server running on my LAN, so there are spontaneous incoming connections as well as outgoing connections. Drop-outs are evident on multiple clients when they occur, and when they are experienced directly are matched by health check reports from the router emailed to admin (me).
I have a business-class cable Internet connection with fixed IP, and a mixed topography LAN with a MoCA system to distribute Ethernet to various places in the house, and four connections direct-wired to the router, all with no intervening switches: one to the cable modem, one to my mail server, one to the MoCA transceiver, and one to a MAC client.
The main system components are in my basement. There is a 15 foot section of coax between the cable splitter at the internal cable distribution point in the basement and the cable modem, which carries both cable TV and MoCA signal. All splitters in the system are MoCA compliant. The rest of the house cable wiring carries TV and MoCA Internet.
All wired connections are fixed IP connections on a private subnet, and DHCP running on the Surf SOHO serves wireless devices such as mobile phones and iPads. while wireless is enabled on the Surf SOHO, there is a second WAP serving first floor users.The fixed IP range does not over lap the DHCP pool. The Surf SOHO provides DNS to the LAN.
Diagnostic efforts to date:
I have a ping-type health test running to my IP’s DNS servers, and the router reports failures, consistent with the (extremely agitated) reports from my two Internet-game-playing sons.
I have had multiple visits from the cable company: we have checked signal levels, replaced wiring inside and outside, replaced the modem, and are now completely at a loss for a cause.
During the outages I*** believe ***that clients can connect to each other on my LAN through hard wiring and through the MoCA system, as I have not witnessed any LAN connectivity issues. I am disinclined to suspect the latter specifically, or LAN integrity in general. I have yet to confirm that I have LAN connections ***through ***the router during dropouts, but I believe that I do (my brain is not in diagnostic mode all the time, regretfully). I have observed WAN disconnected notification on the status screen, but only during downtime that was storm induced, not during any of the Ninja-style failures which are the subject of this post. I will endeavor to capture such an event to assert that I can still connect to the router during an outage. That will demonstrate unequivocally that there are no MoCA system issues (I’m thinking unlikely but possible disturbance on the MoCA line that would interfere with the cable internet signal).
Except for storm related activity (this is summer in Minnesota, so there is plenty of it), there is no cable TV outage concurrent with the Internet outage.
I hope I’ve described the situation completely.
What steps can I take to isolate the Surf Soho as a possible cause for the problem?