nanog mailing list archives
Re: CenturyLink Fiber Latency Issues (Seattle, WA)
From: Neel Chauhan <neel () neelc org>
Date: Tue, 02 Nov 2021 07:28:52 -0700
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 take10% 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 devicewith the bursts of traffic. Ryan -----Original Message-----From: NANOG <nanog-bounces+ryan=rkhtech.org () nanog org> On Behalf Of NeelChauhan 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 theirFiber network in Seattle, WA. However, here's my story. If I attempt to run certain applications that use 1000, or 10000 TCPconnections, I get latency spikes. It is based on how many connections, but also how much bandwidth is used. This means certain things like Tor relaysare off limits to me (which I wish to run). On an idle connection, the PingPlotter outputs look like this: https://centurylinklatencyissues.com/image-000.pngIf I attempt to run BitTorrent with 1000 connections in Deluge, PingPlotterlooks like this: https://centurylinklatencyissues.com/image-002.png Getting support, or even executive contacts to admit the issue hasn'tworked. They all love to blame my equipment or applications, when CL routersalso show the issue when I run the same things whereas my same exactOPNsense box on Google Fiber Webpass running Tor at another address had no issues whatsoever, and I can ping other Tor relays on CenturyLink AS209 justfine (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 forthe issues. However, nothing was done about it afterwards, I'm guessingsince I turned off my Tor relay after the visit to avoid complaints fromfamily members.On an AT&T forum, people have said GPON gives latency spikes/packet loss oncongestion: https://www.dslreports.com/forum/r33242889-How-rare-is-GPON-XGSPON-saturatio nThe 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 routerinstead of my OPNsense box.Going back, do any of you who work at CenturyLink/Lumen can get me to theright people, hopefully the capacity managers in Seattle?I could go with Comcast, but it's either (a) 35 Mbps uploads or (b) $329/mofor "Gigabit Pro" with a 2-year contract and a steep install fee. I amseriously considering Gigabit Pro even if it breaks the bank, but hope Iwon'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 GPONshould easily handle without a sweat. I also don't exactly**trust** Comcast, they're a horrible company in many metrics, but in someways Comcast is more competent than CenturyLink. Best, Neel Chauhan
Current thread:
- CenturyLink Fiber Latency Issues (Seattle, WA) Neel Chauhan (Nov 01)
- RE: CenturyLink Fiber Latency Issues (Seattle, WA) Ryan Hamel (Nov 01)
- Re: CenturyLink Fiber Latency Issues (Seattle, WA) Neel Chauhan (Nov 02)
- Re: CenturyLink Fiber Latency Issues (Seattle, WA) Neel Chauhan (Nov 02)
- Re: CenturyLink Fiber Latency Issues (Seattle, WA) P C (Nov 02)
- Re: CenturyLink Fiber Latency Issues (Seattle, WA) TJ Trout (Nov 03)
- Re: CenturyLink Fiber Latency Issues (Seattle, WA) Neel Chauhan (Nov 04)
- Re: CenturyLink Fiber Latency Issues (Seattle, WA) Eric Kuhnke (Nov 06)
- Re: CenturyLink Fiber Latency Issues (Seattle, WA) Tim Burke (Nov 08)
- Re: CenturyLink Fiber Latency Issues (Seattle, WA) Neel Chauhan (Nov 08)
- Re: CenturyLink Fiber Latency Issues (Seattle, WA) Neel Chauhan (Nov 02)
- RE: CenturyLink Fiber Latency Issues (Seattle, WA) Ryan Hamel (Nov 01)