[Cake] [Bloat] Fwd: [Galene] Dave on bufferbloat and jitter at 8pm CET Tuesday 23

[Taraldsen Erik]

This is getting rather rather Telenor internal and probably is not true for other ISP's, but here we go.  Mobile Broad Band (MBB) is handled by Telenor's Mobile division. Fixed Wireless Access (FWA) is handled by Telenors Fixed division (the same group who does DSL, DOCSIS and GPON).  To further complicate matters, Telenor Group (holding company for Telenor Fixed and Telenor Mobile) deiced to launch FWA before the new value chain was ready.  So we have two versions of FWA - internally called FWA1 and FWA2.  FWA1 (which you have Nils) is not fully compliant with the regulatory definition of a fixed access and has very limited management support (technical monitoring, firmware upgrades etc).  I'm working on the FWA2 value chain and devices.


I assume you are doing the tests on Ethernet, not wifi?  I know the B818 has some wifi issues as well.  To isolate the LTE access I mean.


Yes interesting to see the signal stats from the device, but not needed.  More for my curiosity to compare with the Zyxel devices.


So with subscription limited to 30Mbit and probably radio head room up to ~70Mbit downstream and 10Mbit upstream.  My guess is that you will see more latency in the upstream direction.  I believe the B818 has the very typical "1000 packets fifo, never drop" implementation.



-Erik






________________________________
Fra: Cake <cake-bounces at lists.bufferbloat.net> på vegne av Nils Andreas Svee <me at lochnair.net>
Sendt: torsdag 25. februar 2021 00.27
Til: Taraldsen Erik; Dave Taht; bloat; cerowrt-devel; Make-Wifi-fast; Toke Høiland-Jørgensen via Cake
Emne: Re: [Cake] [Bloat] Fwd: [Galene] Dave on bufferbloat and jitter at 8pm CET Tuesday 23

Ah, yeah it's fixed wireless I meant. Didn't really know how to say it right in English.

We've got the Huawei B818-260 with an EMCOM XPOL-2 4G/5G on the wall.

Yes, we've got a 30 Mbit/sec subscription. In practice we usually see ~30 Mbit downstream and 10-15 upstream, and I believe when we first got the B818 and antenna hooked up I measured ~70 Mbit downstream with a subscription that didn't have any rate limitations, so I assumed we should have a good amount of leeway if something affected the signal.

Sure, I can run some more tests tomorrow. Could also grab some signal stats from the B818 if those are of interest.

By the way, I forgot to mention it when I posted yesterdays tests, but those were conducted over a WireGuard tunnel with CAKE for the downstream running on the other side. Doing that was the only way to get the ADSL subscription we had to behave decently, it simply couldn't handle things like Steam downloads with CAKE on a IFB device in ingress mode, and shaping downstream this way kinda stuck.

Best Regards
Nils

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