Speed drops on WAN port from 500 to 90
Going to post it again, since last post disapeared.
I have an Archer AX11000 behind a provider modem/router.
DMZ in provider modem to Archer, LAN to WAN. Provider is only used for iptv and sending the rest to the AX11000. Both in own subnet.
Untill last week I had a 200/200 connection for a while and always stable. Since a few days I have 500/500 and it drops back to 91/91 a lot of times and so very unstable.
Whatever speedtest I use, internal, external, the same issue.
Every setting in the router has been tried. Resets, older firmware, connecting it without provider router to fiber, speed negotiation settings, firewall, etc etc.
New cables, other ports, you name it.
After altering settings or rebooting it seems fine for a bit, but it drops again.
Anyone else experiencing this or have a solution?