Latency and Packet Loss Spikes for Months, Are These Power Levels Normal?
Hey everyone, for the last few months we have been having very high packet loss and latency spikes (ranging from only a few seconds to a few hours at a time). For a quick example here is the connection today to OpenDNS. With average latency of around 900ms during the window (the graph is for 3 hours). Before and after will be okay with latency of between 10 and 21ms. Local traffic is completely fine. The box is a SuperHub 3 and has been running in Modem Mode for years. I have been trying everything and speaking to Virgin Media but as the issue is intermittent they are not interested in investigating. One final thought I have is that it might be related to power levels. I don't really know anything but I feel the T3 timeouts look a bit high. What do people think? This was also during a period of the connection working, will try and capture it during a spike next time. Also, thank you so much for any time you spent on this. It has been driving me insane. Downstream bonded channels Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID 1 331000000 5.4 38 256 qam 25 2 339000000 5.5 38 256 qam 26 3 347000000 5.5 38 256 qam 27 4 355000000 5 38 256 qam 28 5 363000000 5.1 38 256 qam 29 6 371000000 5 38 256 qam 30 7 379000000 5.5 38 256 qam 31 8 387000000 5.5 38 256 qam 32 9 395000000 5.4 38 256 qam 33 10 403000000 5.6 38 256 qam 34 11 411000000 5.5 38 256 qam 36 12 419000000 5.1 38 256 qam 37 13 427000000 5.1 38 256 qam 38 14 435000000 4.3 38 256 qam 39 15 443000000 4.1 37 256 qam 35 16 451000000 4.1 38 256 qam 40 17 459000000 3.9 37 256 qam 41 18 467000000 3.7 37 256 qam 42 19 475000000 3.4 37 256 qam 43 20 483000000 2.7 37 256 qam 44 21 491000000 2.7 37 256 qam 45 22 499000000 2.5 37 256 qam 46 23 507000000 2.2 37 256 qam 47 24 515000000 2.5 38 256 qam 48 Downstream bonded channels Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors 1 Locked 38.9 12 4 2 Locked 38.6 18 3 3 Locked 38.6 10 0 4 Locked 38.6 0 0 5 Locked 38.6 15 0 6 Locked 38.9 15 0 7 Locked 38.6 10 0 8 Locked 38.6 7 0 9 Locked 38.6 6 0 10 Locked 38.9 5 0 11 Locked 38.6 5 0 12 Locked 38.6 0 0 13 Locked 38.6 5 0 14 Locked 38.6 1 0 15 Locked 37.3 5 0 16 Locked 38.6 6 0 17 Locked 37.6 8 0 18 Locked 37.6 8 0 19 Locked 37.6 5 0 20 Locked 37.6 5 0 21 Locked 37.6 4 0 22 Locked 37.6 23 0 23 Locked 37.6 2 0 24 Locked 38.6 7 0 Upstream bonded channels Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID 1 49600000 49 5120 64 qam 1 2 36600000 48.8 5120 64 qam 3 3 23600068 48 5120 16 qam 5 4 30100000 48.3 5120 32 qam 4 5 43100000 48.8 5120 64 qam 2 Upstream bonded channels Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts 1 ATDMA 0 0 4 0 2 ATDMA 0 0 2 0 3 ATDMA 0 0 10 0 4 ATDMA 0 0 3 0 5 ATDMA 0 0 4 0
