Poor ingress. Why?

[mazzystr]

I have Xfinity gigabit internet w/ no data cap, Arris SurfBoard SB8200 modem, NetGrear r7800 running OpenWRT 19.07

When I run speed test I get Download: 931.03 Mbps / Upload: 41.46 Mbps against netperf-west.bufferbloat.net and CloudFlare's 1.1.1.1.  When I run iperf against my wan ip I get a very lousy  ~4 Mbs with a few spikes up to 9 Mbs.  

What gives with this poor ingress? 

(I'm trying to troubleshoot streaming HD video from my network to my friends network.  It was working good up till about 2 months ago.  I'm just now getting around to troubleshooting.)

[dman77]

Your cable may be receiving ingress from outdated phone lines or FM signal from nearby cell towers. Check out my post here: https://forums.xfinity.com/t5/Your-Home-Network/Signal-ingress-due-to-outdated-neighborhood-phone-pr...

To narrow the issue, I recommend hooking up to Ethernet, installing pingplotter.com & then debugging by reading pingplotter's blog.