LLU service now available from IDNet - Discuss here

SSK · Oct 31, 2011, 09:50:31

Quote from: RobertoS on Oct 30, 2011, 22:12:56
a Broadcom based router is best to match with the Be Broadcom DSLAMs, because features only available on Broadcom are implemented by Be to improve overall line performance.

How can one find out if a particular router is 'Broadcom'?

Sean

Rik · Oct 31, 2011, 09:58:22

Quote from: RobertoS on Oct 30, 2011, 22:44:35
Mi dispiace . Il vino rosso parla. (Sorry! The red wine speaks). At least I acknowledged you raised the point early on.

Go on, admit it, you're just an Olivia Newton John fan.

.Griff. · Oct 31, 2011, 11:45:53

Quote from: SSK on Oct 31, 2011, 09:50:31
How can one find out if a particular router is 'Broadcom'?

Sean

Thomson 510v6, 536v6, 546v6, 585v6, 585v7, 780WL

Netgear DG834Gv4, DG834v4, DM111P, DG834GT, DG834Nv1, DG834PN

D-Link DSL-300B, DSL-2542B, DSL-2640B, DSL-2740B

Ardua · Oct 31, 2011, 16:08:48

I think that I am right in saying that the Billion 7800N could also be added to the above list. That said, given that most broadband issues are IMHO related to the quality of the piece of wire between the exchange and one's home, internal and external noise, WLAN interference, failed filters etc what, in simple terms, can the end user expect if his router has a Broadcom rather than A N Other chipset? I tried a Netgear 3300 on my line (also a Broadcom I think) and it synched at about 12Mbps. My present router with a non-Broadcom chipset happily chugs along at 17.5Mbps. I am convinced that the only reason for the difference in synch rates is a line improvement over time. I just have this vision of a mountain of unloved non-Broadcom modems as users try to reach Broadband Utopia - hence the question.

Jimbo · Oct 31, 2011, 18:42:06

Wooo!

Looks like I've been switched, a bit later than planned.

Internet just went off before and so I checked the Draytek Syslog tool to see that I've re-connected at:-

DOWN SPEED - 2048000
UP SPEED - 864000
SNR MARGIN - 6
LOOP ATT - 58

Average ping to www.idnet.com is now 38ms (max ping was 39ms) and the tracert to www.idnet.com is now two hops shorter (as Rik said it would be).

All in all, quite pleased compared to my original stats (posted on Pg.6), my "max" ping has dropped by 7ms. "Average" has dropped by 1ms. My upload speed looks to have doubled and download speed reduced slightly but still very good for my poor line. SNR Margin seems to be the same and I have a slightly reduced Loop Attenuation by 1dB.

When is the best time to reboot a router to achieve the best sync?

Cheers!

jezuk1 · Oct 31, 2011, 20:08:44

QuoteI have a slightly reduced Loop Attenuation by 1dB.

Yes, my attenuation dropped by 3db (or roughly 8%) when I was switched to LLU. Was pleased with that!

Lance · Oct 31, 2011, 23:30:56

Normally to get the highest sync you woul resync in the morning. However, every line is different so I normally recommend running routerstats for 24/48 hours an looking for the highest point on the noise margin graph.

mk1 · Nov 01, 2011, 09:16:23

I should be making the switch today

Lance · Nov 01, 2011, 14:39:22

Quote from: mk1 on Nov 01, 2011, 09:16:23
I should be making the switch today

And what about your broadband?

pctech · Nov 01, 2011, 15:23:04

Quote from: Lance on Nov 01, 2011, 14:39:22
And what about your broadband?

esh · Nov 01, 2011, 15:48:07

Quote from: Lance on Oct 31, 2011, 23:30:56
Normally to get the highest sync you woul resync in the morning. However, every line is different so I normally recommend running routerstats for 24/48 hours an looking for the highest point on the noise margin graph.

It seems I feel foul of this as ADSL2 is touchy when it comes to SNR. It happened that a brief IDNet maintenance outage appeared to cause it to resync to a higher rate (~13.5Mbit), which then on Sunday meant at peak time the SNR Margin fell very low (4dB) which caused the line to drop. I'm now sitting at a quite frankly silly 14-15 dB SNR Margin (at off peak of course) but it's definitely stable now, which is what I want!

Rik · Nov 01, 2011, 17:09:30

The IDNet work could not (well, should not) have caused a resync, it certainly didn't for me. For your NM to be 15db suggests that either you've had a lot of resyncs or that the noise has gone away leaving you with a larger NM - in which case a forced resync should restore your speed.

Steve · Nov 01, 2011, 17:24:56

No DLM on Be so you should be able to find from support at what level the NM is set at, as an adjustment downwards maybe possible.

Rik · Nov 01, 2011, 17:26:21

Good point, Steve.

RobertoS · Nov 01, 2011, 18:14:24

Quote from: esh on Nov 01, 2011, 15:48:07
It seems I feel foul of this as ADSL2 is touchy when it comes to SNR. It happened that a brief IDNet maintenance outage appeared to cause it to resync to a higher rate (~13.5Mbit), which then on Sunday meant at peak time the SNR Margin fell very low (4dB) which caused the line to drop. I'm now sitting at a quite frankly silly 14-15 dB SNR Margin (at off peak of course) but it's definitely stable now, which is what I want!

4dB is a perfectly reasonable level for a noise margin and should not cause a re-sync. A variation of 4dB over 24 hours is perfectly normal, hence the Be and BT defaults of 6dB at sync-time. The latest BT one even drops it automatically to 3dB on stable lines, and Be has a 3dB option that a lot of people use.

Having said that, if you have a Speedtouch 586 router, I found both mine could only hold sync as low as 3.5dB, so any tiny spike below that caused a re-sync. As my 24-hour variation was also 3.5dB, using the standard 6dB setting meant daily drops. I stopped using them and swapped to Netgears, which hold to 0dB, which by definition is what should happen.

mk1 · Nov 01, 2011, 18:14:55

Well i guess BT or whoever didnt do the work today as the email said it would be sometime today before 6pm! router has'nt dropped once.

Rik · Nov 01, 2011, 18:20:03

Has your sync speed changed at all. Mine happened so quickly I didn't actually notice it.

mk1 · Nov 01, 2011, 18:53:13

No nothing has changed, i would have thought the router would also pick up the disconnection in the log?

gwidnet · Nov 01, 2011, 20:42:08

Hi I've been moved to LLU today and I'm syncing at a higher speed 11540 it was about 7750, but the line seems to be disconnecting quite frequently and my SNR downstream is only 1.6, upstream SNR is 6.6

Do you think it will settle to a slightly higher SNR?

(Billion 7800n router)

esh · Nov 01, 2011, 20:44:32

Maybe I'm talking nonsense then. But it just seems that I got a very low chunk of SNR at the weekend and then it promptly glitched and you can see it goes up (now at lower speed).

Graph with rolling average

Also an SNR margin of 1.6 sounds very low, gwidnet. I suspect your speed will decrease as it resyncs a few times and the SNR margin will go up again.

Steve · Nov 01, 2011, 20:46:12

I think it should settle with higher SNR and you have the ability with the 7800N I believe to adjust it (unofficially)..

At your own risk http://forums.whirlpool.net.au/archive/1567481

gwidnet · Nov 01, 2011, 20:50:19

Yes thanks both, I agree it's a bit low, I think I'll just see if it settles a bit higher. I can set the snr, I thought it was only to adjust it down, but of course it will probably work to adjust it up as well.

RobertoS · Nov 01, 2011, 21:12:59

@esh
There is something seriously wrong there esh. If it wasn't doing that before you were moved, I suggest that either the connection at the exchange is dodgy, or your router needs a firmware upgrade.

mk1 · Nov 02, 2011, 10:30:13

Quote from: mk1 on Nov 01, 2011, 18:14:55
Well i guess BT or whoever didnt do the work today as the email said it would be sometime today before 6pm! router has'nt dropped once.

My mistake i can't read! The change over to LLU is Tue 7 November!

Rik · Nov 02, 2011, 10:34:20

Close.