IPv4 Packet loss on windy afternoons
I have been working from home for over a year now and my Comcast/Xfinity internet performance has been very reliable, until now...
Starting on 4/21, my connection has been experiencing severe intermittent packet loss (1% - 20%). This seems to happen around 13:00 and continues until about 17:00, especially when its windy outside. I logged into my modem to check the logs (Motorola MB8600) and nothing over a notice level 6 (message sent). My signal-noise and signal levels are very good (SNR: 39.4 - 40.1 dB) and -2 to 0.2 dBmV respectively on the main channels (1-32). My OFDM channel 33, however, is not very healthy at all with a SNR of 0 dB and signal level of -7.1 dBmV. Speed tests have been fine, even in the afternoons, 80-100/4-6 Mbps on a 100/5 Mbps tier.
Any idea of how to troubleshoot further? I think the problem is upstream with the CMTS but getting comcast/xfinity to do anything other than take my monthly payment seems unlikely at best...
One more tidbit, which may be significant, there have been two new cable hookups in my neighborhood recently; one neighbor on my node and another on an adjacent circuit. This seems more causal than coincident.
Oh, one last detail: I'm only having trouble on IPv4, my IPv6 connection seems to be pretty solid. Unfortunately my work VPN only supports IPv4 so that doesn't help much..
Any help would be greatly appreciated!