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MR80/MS80 speeds collapse to 5–7 Mbps until reboot
I have an MR80 router with one MS80 satellite. The system initially performs well after rebooting (with download speeds of over 500 Mbps even on Wi-Fi devices connected to the MS80 satellite), but after several hours or days, performance suddenly collapses and remains degraded until the mesh system is restarted. After the most recent reboot, my monitoring log recorded the following: - At 5:02 PM, with 5.09 hours of router uptime: 504 Mbps download, 110 Mbps upload, 15.9 ms idle latency, and 0% packet loss. - At 5:12 PM, with 5.26 hours of uptime: 7.35 Mbps download, 5.72 Mbps upload, 14.8 ms idle latency, and 0% packet loss. - Subsequent tests remained around 5–7 Mbps in both directions across numerous Speedtest servers. The failure was abrupt rather than gradual. Idle ping usually remained around 14–20 ms, but latency under load frequently exceeded 500 ms during downloads and 1,000–2,500 ms during uploads. A desktop computer connected by Ethernet through the MS80 is affected. Wi-Fi devices connected through the satellite also experience the slowdown. In previous occurrences, the MR80’s internal Internet speed test continued to report more than 900 Mbps, indicating that the modem and ISP connection were still functioning normally. The problem initially occurred approximately every four days, but following the latest reboot, it returned after only about five hours. Restarting the MR80 restores normal performance temporarily, with devices connected through the satellite returning to several hundred Mbps. I have also experienced recurring connectivity problems in which multiple smart-home devices appear disconnected or unreachable. Restarting individual devices does not reliably resolve this, but restarting the MR80 does. Troubleshooting already performed includes: - Updating the MR80 and MS80 firmware. -Confirming that the modem is operating in bridge mode. -Disabling UPnP. -Confirming that IPv6, Traffic Meter, and parental-control features are disabled. -Rebooting the modem, MR80, and MS80. -Testing different Ethernet cables and switch ports. -Testing multiple independent Speedtest servers. -Monitoring latency, packet loss, download speed, upload speed, loaded latency, and router uptime. Several existing community discussions describe nearly identical MR80/MS80 behavior: satellite-connected devices suddenly falling to approximately 5–10 Mbps, including devices wired directly to the MS80, while the MR80’s Internet connection remains fast. This suggests that the MR80/MS80 wireless backhaul is entering a defective low-throughput state. Is this a known firmware or backhaul issue? Are there any diagnostic logs, hidden backhaul-status pages, hotfix firmware versions, or other tests that can identify why the MR80/MS80 link abruptly becomes limited to approximately 5–7 Mbps? Current MR80 firmware version: V1.1.8.20_3.1.112 Current MS80 firmware version: V1.1.8.20_3.1.112 (Summarized with ChatGPT)Having Issue with MS80 Satellite
I have been having this same issue, and I discovered today. After finding this forum I am thinking it is failing. Wanted to let others know as well. I am swapping with the other satellite and / or run ethernet between the two to see if that helps I had one satellite that wired and wireless devices on it would occasionally reduce speeds to almost nothing. I found the issue because the hardwired device got internet back before some of the wireless devices did. If I reboot the satellite, it will come back. It will also come back eventually after without a reboot.