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As I said, mine is set to 1500 by Three, who have full updating access so they would change it if they thought that was needed. Curious. My B535 was supplied in mid-July on a 30-day contract, set to 1440.
I can confirm 1500 did not report ICMP fail with DF when I tested before Monday (Sept 7), but did fail when tested after (including just 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.
Edited by richi (Mon 14-Sep-20 15:07:23)
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My 5G Huawei is also 1440
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Looks like Three got the hint of whats wrong from your post 
IN any case, three subscribers are happy if the network remains like this! I know plenty of people were hammering on them since before I started having problems back in May.
I did spend some considerable time and effort sending them results of tests, as requested by the techs. It became clear that things were much improved when using a Huawei router, rather than the TP-Link I was using (but the random stalls weren't fixed). On my todo list is to dust off my TP-Link and see if whatever they've changed has fixed it for that hardware too.
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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I know, but even streaming that uses multiple streams doesn’t make dozens of TCP connections in a fraction of a second like loading a complex (but typical) webpage.
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I still see this issue on 4G, but not with 3G, which makes me thing they still need to make this change throughout the core. It's not a cell capacity issue either, as 4G speed tests easily achieve 50-60mbps.
3's mixed bag of vendors for the 3,4 adn 5G RAN might have something to do how long it took them to identify where this issue was.
Location: Essex.
Edited by Anonymous1337 (Tue 15-Sep-20 09:02:20)
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I still see this issue on 4G, but not with 3G That's consistent with what I was seeing, too. When the problem went away for me, it was just after the signal from my mast went up/down a lot over the weekend. And Three sent me a text to say "we're working on your local mast." That's why I assume the fix needs to be rolled out mast by mast (or perhaps by area).
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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"ping -f -l 1412 richi.uk" now does not cause frags. Perhaps they made some other fix?
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"ping -f -l 1412 richi.uk" now does not cause frags. Perhaps they made some other fix? Not here. Still 1400.
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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Did you set that on your router? Did you increase it again before you tested?
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Did you set that on your router? Did you increase it again before you tested? Thanks for asking. Yes. And reset the stack. And rebooted just in case.
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.
Edited by richi (Wed 16-Sep-20 13:54:13)
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