I second this, most best effort Broadband cpe equipment will choke with lots of concurrent connections
On Tue, Nov 2, 2021, 8:25 PM P C <pc50...@gmail.com> wrote: > If this is connection count related only, It is most likely an issue with > the CPE (router), NAT table, or similar. > > On Tue, Nov 2, 2021 at 8:21 AM Neel Chauhan <n...@neelc.org> wrote: > >> I tried that back in September, it didn't work. It doesn't happen on my >> hop but the one after that. Even a second GPON connection shows the >> issues if one is running the offending traffic. >> >> The issue occurs even if I'm using 50 Mbps out of my 940. >> >> It may be bufferbloat on CL's side but they keep denying the issue. >> >> I guess I'll have to break the bank and get Comcast Gigabit Pro. >> >> CenturyLink should just get bought out by another telco, like how >> Cablevision got bought by Altice. >> >> -Neel >> >> On 2021-11-01 20:52, Ryan Hamel wrote: >> > Neel, >> > >> > Sounds like buffer bloat. >> > >> > Run a speed test, whatever is your maximum for your download and upload >> > take >> > 10% away from it, and setup traffic shaping in OPNsense >> > (https://docs.opnsense.org/manual/shaping.html) with those values. If >> > the >> > issue goes away, then you're exceeding the buffer of CenturyLink's >> > device >> > with the bursts of traffic. >> > >> > Ryan >> > >> > -----Original Message----- >> > From: NANOG <nanog-bounces+ryan=rkhtech....@nanog.org> On Behalf Of >> > Neel >> > Chauhan >> > Sent: Monday, November 1, 2021 6:44 PM >> > To: nanog@nanog.org >> > Subject: CenturyLink Fiber Latency Issues (Seattle, WA) >> > >> > Hi NANOG Mailing List, >> > >> > I don't know if any of you work at CenturyLink/Lumen, very less on >> > their >> > Fiber network in Seattle, WA. However, here's my story. >> > >> > If I attempt to run certain applications that use 1000, or 10000 TCP >> > connections, I get latency spikes. It is based on how many connections, >> > but >> > also how much bandwidth is used. This means certain things like Tor >> > relays >> > are off limits to me (which I wish to run). >> > >> > On an idle connection, the PingPlotter outputs look like this: >> > https://centurylinklatencyissues.com/image-000.png >> > >> > If I attempt to run BitTorrent with 1000 connections in Deluge, >> > PingPlotter >> > looks like this: >> > https://centurylinklatencyissues.com/image-002.png >> > >> > Getting support, or even executive contacts to admit the issue hasn't >> > worked. They all love to blame my equipment or applications, when CL >> > routers >> > also show the issue when I run the same things whereas my same exact >> > OPNsense box on Google Fiber Webpass running Tor at another address had >> > no >> > issues whatsoever, and I can ping other Tor relays on CenturyLink AS209 >> > just >> > fine (from a VPS). >> > >> > The most competent person I dealt with was actually one tech. He told >> > me >> > there was "capacity issues" in our neighborhood, and that's the reason >> > for >> > the issues. However, nothing was done about it afterwards, I'm guessing >> > since I turned off my Tor relay after the visit to avoid complaints >> > from >> > family members. >> > >> > On an AT&T forum, people have said GPON gives latency spikes/packet >> > loss on >> > congestion: >> > >> https://www.dslreports.com/forum/r33242889-How-rare-is-GPON-XGSPON-saturatio >> > n >> > >> > The capacity managers in Seattle are literally dragging their feet: >> > it's >> > 100x worse than AT&T's 802.1X. I know AT&T and CenturyLink don't >> > compete, >> > but if I had to choose between AT&T Fiber and CenturyLink, I'll take >> > AT&T in >> > a heartbeat, no ifs, no buts, even if I have to use AT&T's crappy >> > router >> > instead of my OPNsense box. >> > >> > Going back, do any of you who work at CenturyLink/Lumen can get me to >> > the >> > right people, hopefully the capacity managers in Seattle? >> > >> > I could go with Comcast, but it's either (a) 35 Mbps uploads or (b) >> > $329/mo >> > for "Gigabit Pro" with a 2-year contract and a steep install fee. I am >> > seriously considering Gigabit Pro even if it breaks the bank, but hope >> > I >> > won't have to go there. >> > >> > I don't need 2 Gbps and would rather pay $65 than $329. 300-500 Mbps >> > uploads >> > when I need it is the sweet spot for me (even without Tor) which CL >> > GPON >> > should easily handle without a sweat. I also don't exactly >> > **trust** Comcast, they're a horrible company in many metrics, but in >> > some >> > ways Comcast is more competent than CenturyLink. >> > >> > Best, >> > >> > Neel Chauhan >> >
