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Standard User richi
(member) Sat 12-Sep-20 15:52:49
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Re: Three is finally working properly OMFG.


[re: RobertoS] [link to this post]
 
Could be, but worse than that: I'm guessing there was a bug where sometimes the frags wouldn't get combined properly, the payload was corrupted but the TCP checksum gets recalculated against the corrupt data.

70/30 Three unlimited SIMO, replacing 3 km ADSL line.
Previously: BT ISDN, Nildram, Plusnet, 186k, EFH, Be*, Plusnet (again), Pulse8, Sky, Plusnet Business, TalkTalk Retail.
Standard User richi
(member) Sat 12-Sep-20 16:06:14
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Re: Three is finally working properly OMFG.


[re: jchamier] [link to this post]
 
In reply to a post by jchamier:
Interesting, the advice on DSLreports and other sites for over 10 years has always said to never change the router, always change the PC. Otherwise you just cause the router more work
Yeah but by changing the router's setting, you're matching the local MTU to the maximum PMTU, which should make it easier on the cheap plastic router, not harder.

Or I might be overthinking it.

By all means hardcode your Windows or macOS stack as well, but that's probably just gilding the lily (and as you say, you can't do it on most of your other devices at home).

70/30 Three unlimited SIMO, replacing 3 km ADSL line.
Previously: BT ISDN, Nildram, Plusnet, 186k, EFH, Be*, Plusnet (again), Pulse8, Sky, Plusnet Business, TalkTalk Retail.
Standard User richi
(member) Sat 12-Sep-20 17:17:03
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Re: Three is finally working properly OMFG.


[re: RobertoS] [link to this post]
 
In reply to a post by RobertoS:
Not for me it didn't.
Me neither. YouTube is noticeably smoother and more consistent now.

70/30 Three unlimited SIMO, replacing 3 km ADSL line.
Previously: BT ISDN, Nildram, Plusnet, 186k, EFH, Be*, Plusnet (again), Pulse8, Sky, Plusnet Business, TalkTalk Retail.


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Standard User andynormancx
(member) Sat 12-Sep-20 17:22:54
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Re: Three is finally working properly OMFG.


[re: RobertoS] [link to this post]
 
I guess we're not dealing with a single issue then.

With my problems it was very consistent over several months:

- random websites needing lots of TCP connections would often stall
- streaming connections were basically never impacted (there was never any buffering on several hours of video streaming each evening)
- VPN connections were never impacted

Edited by andynormancx (Sat 12-Sep-20 17:25:44)

Standard User jchamier
(eat-sleep-adslguide) Sat 12-Sep-20 22:06:11
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Re: Three is finally working properly OMFG.


[re: richi] [link to this post]
 
In reply to a post by richi:
Yeah but by changing the router's setting, you're matching the local MTU to the maximum PMTU, which should make it easier on the cheap plastic router, not harder.

Or I might be overthinking it.

I don’t think there is any point changing the router. The PMTU may be higher or lower as it is the combination of networks (not just the ISP) that your traffic routes through, to get to the service you are after.

By all means hardcode your Windows or macOS stack as well, but that's probably just gilding the lily (and as you say, you can't do it on most of your other devices at home).
I also don’t see the benefit changing the router. PMTU will handle the networks.

20 years of broadband connectivity since 1999 trial - Live BQM
Standard User Appy
(learned) Sun 13-Sep-20 20:36:08
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Re: Three is finally working properly OMFG.


[re: Appy] [link to this post]
 
Performance is still good. Websites load quickly and no sign of the previous stalling issues. One odd thing though - three days ago I was getting solid 80Mbps upload however, over the weekend, 18Mbps is the max I can get.
Standard User richi
(member) Mon 14-Sep-20 09:06:29
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Re: Three is finally working properly OMFG.


[re: andynormancx] [link to this post]
 
In reply to a post by andynormancx:
I guess we're not dealing with a single issue then.
Might not be as cut'n'dried as this though. Some streaming services open more than one parallel connection—YouTube for example.

70/30 Three unlimited SIMO, replacing 3 km ADSL line.
Previously: BT ISDN, Nildram, Plusnet, 186k, EFH, Be*, Plusnet (again), Pulse8, Sky, Plusnet Business, TalkTalk Retail.
Standard User richi
(member) Mon 14-Sep-20 09:08:53
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Re: Three is finally working properly OMFG.


[re: jchamier] [link to this post]
 
In reply to a post by jchamier:
The PMTU may be higher or lower as it is the combination of networks (not just the ISP) that your traffic routes through, to get to the service you are after.
I'm confused. How can it be higher?

70/30 Three unlimited SIMO, replacing 3 km ADSL line.
Previously: BT ISDN, Nildram, Plusnet, 186k, EFH, Be*, Plusnet (again), Pulse8, Sky, Plusnet Business, TalkTalk Retail.
Standard User jchamier
(eat-sleep-adslguide) Mon 14-Sep-20 09:49:58
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Re: Three is finally working properly OMFG.


[re: richi] [link to this post]
 
In reply to a post by richi:
How can it be higher?
Higher than your test, as your target will be a different network / host.

20 years of broadband connectivity since 1999 trial - Live BQM
Standard User richi
(member) Mon 14-Sep-20 10:32:11
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Re: Three is finally working properly OMFG.


[re: jchamier] [link to this post]
 
In reply to a post by jchamier:
In reply to a post by richi:
How can it be higher?
Higher than your test, as your target will be a different network / host.
But on the assumption that 1400 is now the limit for DF packets within Three's core, PMTU Discovery surely will cap at 1400, no?

70/30 Three unlimited SIMO, replacing 3 km ADSL line.
Previously: BT ISDN, Nildram, Plusnet, 186k, EFH, Be*, Plusnet (again), Pulse8, Sky, Plusnet Business, TalkTalk Retail.
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