Router frequently retraining?
Philip Meyer
games. Generally happens once every 1-2 hours.
It's most annoying if I am playing Call Of Duty - Modern Warfare; when it
occurs, it never reconnects.
I have been converted to ADSL2+. My connection is not particularly good. I get
a downstream rate between 2400 and 3500 Kbps.
So, I'm wondering what causes it. I'm guessing that the line is being retrained
frequently.
Is this because the line is bad? Should it cause the connection to be dropped
when it is retraining? Is there anything I can do about it (eg. a way to fix it
at a lower rate to stop frequent retrain occurances)?
What is the recommended DSL Modulation setting to use? I've always used G.dmt,
but I think other modes work. My router is a Linksys WAG54GX2, and supports:
Multimode, T1.413, G.Dmt, G.lite, ADSL2, ADSL2+.
David Briggs
Philip Meyer <no-...@no-spam.com> wrote:
> I keep experiencing drop-outs on my connection; most noticeably when playing
> games. Generally happens once every 1-2 hours.
> What is the recommended DSL Modulation setting to use? I've always
> used G.dmt,
> but I think other modes work. My router is a Linksys WAG54GX2, and supports:
> Multimode, T1.413, G.Dmt, G.lite, ADSL2, ADSL2+.
Philip,
The following is from Demon's ADSL2+ web page;
>>>>>>>>>>
"One issue that has been identified with a small number of customers
is that some routers may not correctly identify the change in
connection once the migration to the new Demon 2+ service has
completed and thus may select an incorrect transmission mode. The
correct router transmission mode for Demon 2+ is g.992.5 Annex A.
Some routers will call this mode either ADSL 2+ annex or ADSL 2+ auto.
If the router transmission mode is set to multimode, g.dmt or another
setting (which some routers may switch to incorrectly) then the
following *could* happen:
1) The router will not sync at all.
2) The router will sync but only at previous Demon Broadband speeds or
����less.
Selecting the correct transmission mode in the router configuration as
outlined above will resolve these issues."
>>>>>>>>>>
Your Linksys router should be set to ADSL2+. You should then switch
the router off for a few seconds and then switch it back on again.
Once it resyncs your connection speed should, all being well, be
higher than before. My Linksys WAG160n originally connected at 8Mbit
but after the upgrade it now connects at about 11Mbit.
Hope this helps.
--
David Briggs
Philip Meyer
>the router off for a few seconds and then switch it back on again.
>Once it resyncs your connection speed should, all being well, be
>higher than before. My Linksys WAG160n originally connected at 8Mbit
>but after the upgrade it now connects at about 11Mbit.
>
I tried it in ADSL2+ mode initially when Demon switched me over, but it seemed
to result in a slower rate.
I tried switching over again last night, and the connection speed seems about
the same. i.e. I get a little bit more downstream than I did previously with
ADSL.
However, I still seem to have frequent link issues. Looking at the router log,
the link went down a few times over night. Connection uptime in some cases were
10.5 mins and 20 mins!
Jim O'Reilly
<dbr...@kepler.demon.co.uk> writes
>correct router transmission mode for Demon 2+ is g.992.5 Annex A.
router.Not on adsl2+ at the moment.My exchange is not compliant yet.
--
Jim O'Reilly
Jim O'Reilly
<{$mrtickle$}@nospam.demon.co.uk> writes
>In <X74sgLA2...@jimoreilly.demon.co.uk>, Jim O'Reilly
><Jim_n...@jimoreilly.demon.co.uk> wrote:
>
>>In article <0b1638605...@kepler.demon.co.uk>, David Briggs
>><dbr...@kepler.demon.co.uk> writes
>>>correct router transmission mode for Demon 2+ is g.992.5 Annex A.
>>Mine is g.992.1 Annex A.Is that ok for adsl2+.
>
>ADSL2+ mode, so there's no way it could or would be reporting "g.992.5
>Annex A" today.
>
>>Speedtouch 546 v6
>>router.Not on adsl2+ at the moment.My exchange is not compliant yet.
>
>it says then. If it doesn't start reporting g.992.5 Annex A then that is
>the time you need to check its settings, because you'd be running in ADSL
>mode on an ADSL2+ line.
Thanks Mike
--
Jim O'Reilly
Philip Meyer
course of action will be.
Firstly, does anyone know what Multiplexing mode should work best: LLC or VC?
I found that I can control my SNR by telnetting into the router and issuing the
command "adslctl configure --snr 150 --sra on".
This seems to give me a higher downstream SNR. My router stats are now
reporting:
Status: Showtime Channel: FAST, Upstream rate = 839 Kbps, Downstream rate = 214
4 Kbps
Link Power State: L0
Mode: ADSL2+
Channel: Fast
Trellis: ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 12.7 5.9
Attn(dB): 61.0 30.9
Pwr(dBm): 15.4 12.6
Max(Kbps): 2560 848
Rate (Kbps): 2912 847
It appears that I'm still getting dropped connections though. Quite a lot of
Upstream SFErrors (whatever that means):
Counters
SF: 8934 8932
SFErr: 11 206309
RS: 1742162 0
RSCorr: 0 0
RSUnCorr: 0 0
Also CRC checksum failures:
Total time = 4 hours 57 min 52 sec
SF = 1074377
CRC = 1941
LOS = 0
LOF = 0
ES = 486
I've checked my internal wiring. Only the two data lines connected (pins 2 and
5), no ring line. I've tried my router directly in the master socket, and get
the same as when it is connected to the extension point.
Should I try phoning Demon, or BT, to get the external line checked out?