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DLink modem bitswap
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Topic: DLink modem bitswap (Read 12459 times)
Weaver
Senior Kitizen
Posts: 11459
Retd s/w dev; A&A; 4x7km ADSL2 lines; Firebrick
DLink modem bitswap
«
on:
January 03, 2016, 03:48:46 AM »
I have several DLink DSL-320B-Z1 modems (in bridge mode, modem-only). There is a page similar to the following in the web UI
http://www.support.dlink.com/emulators/dsl2540b/100/adslcfg.html
(That's for the wrong modem, but it gives an idea.)
Shouldn't "bitswap enable" be always ticked? As shown.
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burakkucat
Respected
Senior Kitizen
Posts: 38300
Over the Rainbow Bridge
Re: DLink modem bitswap
«
Reply #1 on:
January 03, 2016, 03:25:49 PM »
Yes. I would ensure that "Bitswap Enable", "SRA" and "ADSL2" are selected, everything else is deselected.
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100% Linux and, previously, Unix. Co-founder of the
ELRepo Project
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Weaver
Senior Kitizen
Posts: 11459
Retd s/w dev; A&A; 4x7km ADSL2 lines; Firebrick
Re: DLink modem bitswap
«
Reply #2 on:
January 03, 2016, 04:55:39 PM »
The modems I have been using had this option unticked. What will this do to performance and reliability?
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Weaver
Senior Kitizen
Posts: 11459
Retd s/w dev; A&A; 4x7km ADSL2 lines; Firebrick
Re: DLink modem bitswap
«
Reply #3 on:
January 03, 2016, 04:57:54 PM »
I don't understand how I've been getting away without this?
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aesmith
Kitizen
Posts: 1216
Re: DLink modem bitswap
«
Reply #4 on:
January 03, 2016, 05:06:27 PM »
Is SRA supported by BT?
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Weaver
Senior Kitizen
Posts: 11459
Retd s/w dev; A&A; 4x7km ADSL2 lines; Firebrick
Re: DLink modem bitswap
«
Reply #5 on:
January 03, 2016, 05:28:27 PM »
I believe SRA is not supported by BT, hardly by anyone in the UK. Kitz mentioned UKOnline iirc.
«
Last Edit: January 03, 2016, 05:33:53 PM by Weaver
»
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Weaver
Senior Kitizen
Posts: 11459
Retd s/w dev; A&A; 4x7km ADSL2 lines; Firebrick
Re: DLink modem bitswap
«
Reply #6 on:
January 03, 2016, 05:31:50 PM »
The help says
“
By default the D-Link router will determine your best connection.
”
in what looks like an attack of cut and pastry maybe. But there is no default, it's either off or on. So presumably unticked means disabled and ticked means default to on?
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Weaver
Senior Kitizen
Posts: 11459
Retd s/w dev; A&A; 4x7km ADSL2 lines; Firebrick
Re: DLink modem bitswap
«
Reply #7 on:
January 03, 2016, 05:37:09 PM »
The previous set of modems, Mode = auto, as opposed to Mode = default, were
the same
btw.
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Weaver
Senior Kitizen
Posts: 11459
Retd s/w dev; A&A; 4x7km ADSL2 lines; Firebrick
Re: DLink modem bitswap
«
Reply #8 on:
January 03, 2016, 05:59:29 PM »
Why would anyone
want or need
to
disable bitswap
? I wasn't even aware that you could do such a thing?
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burakkucat
Respected
Senior Kitizen
Posts: 38300
Over the Rainbow Bridge
Re: DLink modem bitswap
«
Reply #9 on:
January 03, 2016, 06:23:11 PM »
You have three of those devices, each with its own circuit. Perhaps turn on bit swapping in the configuration for one modem only and see how the circuit behaves? Then, after examining the result so obtained, turn on bit swapping for the second and third modems.
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100% Linux and, previously, Unix. Co-founder of the
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Please consider making a
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NewtronStar
Kitizen
Posts: 4898
Re: DLink modem bitswap
«
Reply #10 on:
January 03, 2016, 09:07:38 PM »
The way it works is to swap spare SNR to tones that are not being effected by burst of noise though you would need plenty of non effected spare tones close by for it work well but it's better on than off it should make the line more stable.
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Weaver
Senior Kitizen
Posts: 11459
Retd s/w dev; A&A; 4x7km ADSL2 lines; Firebrick
Re: DLink modem bitswap
«
Reply #11 on:
January 03, 2016, 09:14:43 PM »
I'm afraid I went the whole hog, and asked Mrs Weaver to tick bitswap enable on all the modems.
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Chrysalis
Content Team
Addicted Kitizen
Posts: 7420
AAISP CF
Re: DLink modem bitswap
«
Reply #12 on:
January 04, 2016, 01:46:22 AM »
bitswapping can have a massive impact, it should always be on really unless its buggy to the point its detrimental (in which case the modem shouldnt be on the market) or for troubleshooting purposes.
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Weaver
Senior Kitizen
Posts: 11459
Retd s/w dev; A&A; 4x7km ADSL2 lines; Firebrick
Re: DLink modem bitswap
«
Reply #13 on:
January 04, 2016, 01:54:15 AM »
Unless I am misunderstanding some system of defaults, my ISP, Andrews and Arnold, appears to be sending out DLink modems with the bitswap tick box unticked! Is this not disastrously bad?
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Chrysalis
Content Team
Addicted Kitizen
Posts: 7420
AAISP CF
Re: DLink modem bitswap
«
Reply #14 on:
January 04, 2016, 05:27:36 AM »
are AAISP configuring it like that or is that the firmware default? seems very odd to disable it.
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