Re: CenturyLink Fiber Latency Issues (Seattle, WA)

[TJ Trout <tj () pcguys us>]

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 <pc50000 () 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 <neel () 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.org () 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