This isn't a new issue, I've had this problem for a couple years. My connection speeds are fine and I don't get disconnected often but my latency is servery unstable and the extreme jitter I get makes any real-time latency demanding program or game nearly unusable. My plan is BASIC Internet 300 and I have the Technicolor DPC3848V gateway modem (from 2014). Below are some tests I've done and things I've tried to resolve it on my own

Test condition:

• 1 computer connected via 5ft CAT6e cable (manual DHCP IP reservation + DMZ)

• All extra services on gateway disabled (2.4ghz/5ghz wireless, WPS, UPNP, firewall)

• All processes/services that rely on network connectivity on Windows that could be reasonably killed/stopped

• Only IPv4 service selected within the network adapter properties

• Tests done one at a time and with the network as idle as it could be

Test results:

• Connected to Shaw's network: https://imgur.com/a/mJiBOQl

• Connected to VPN's network (Vancouver server): https://imgur.com/a/hLug5wk

• Latency test to the gateway itself: https://i.imgur.com/BagqFZV.png

Things I've tried:

• Replacing coaxial cable

• CAT5e, CAT6, CAT6e cables of varying lengths

• Every ethernet port on the gateway

• Restore to factory settings

• 30-30-30 reset

• Different network adapters and drivers

• Different DNS servers (not that it matters)

• Asking Shaw for a gateway replacement (requested 3 times over the last 2 years, no replacement received)

It doesn't seem to matter which computer/device I use, what settings I've configured, my network setup, or the time of day/night. It is a consistent problem and nothing I can reasonably do client-side has resolved the issue. VPN does help a bit but the problem is definitely still there. I've also had issues with very slow navigation within the modem configuration pages (after running for a while and after restarting it) as well as port forwarding not saving or displaying properly.

Please help