VDSL Performance & Tuning

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#1545626 2-May-2016 21:46

DLM sorts your ping out for you, and there is not much you can do about that.

speed wise, id say between 30 and 50mbps down and about 8-14mbps up

hotrok

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#1545761 3-May-2016 08:48

cheers for the reply, thats not too shabby. Out of interest do they have different restrictions on speed for rural setups?

Cheers

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#1545762 3-May-2016 08:49

hotrok:

cheers for the reply, thats not too shabby. Out of interest do they have different restrictions on speed for rural setups?

Cheers

I'm on rural (sadly, not as close to the cabinet as you are) and no, you get the same service as anyone else. Which is to say, as good as your line will deliver.

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Lizard Networks

#1545822 3-May-2016 09:59

ild put you closer to 50 down on a rural line, should come out with about 9dB attenuation if my math is right there.

Likely outside of 17a sadly.

Latency your only option is DLM deciding, DLM-1 is the only profile with low latency so i would say best advice is simply plug in the modem, and DONT touch it. that will allow DLM to see you as reliable as possible and keep hold of that DLM-1.

Dropping to DLM-2 will give you +7ms latency each way. (so essentially a jump of 16ms on pings.)

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hotrok

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#1554566 18-May-2016 08:56

Well looks like the local cabinet has switched on the fibre connection although I dont think they are allowing adsl2 profiles but the line attenuation has changed. What are these stats like, the upstream sync seems a little off is that normal? Actual download (speedtest) was 7.4 mb/s d/l and 0.6 u/l. From my understanding its normal to have more noise going from adsl1 to adsl2. What gauge wire do they use for rural lines?

DSL Type: ITU-T G.992.5 Bandwidth (Up/Down) [kbps/kbps]: 833 / 22.929 Data Transferred (Sent/Received) [MB/MB]: 2,58 / 18,92 Output Power (Up/Down) [dBm]: 12,4 / 15,9 Line Attenuation (Up/Down) [dB]: 4,5 / 8,0 SN Margin (Up/Down) [dB]: 12,0 / 12,1 System Vendor ID (Local/Remote): TMMB / ---- Chipset Vendor ID (Local/Remote): BDCM / BDCM Loss of Framing (Local/Remote): 0 / 0 Loss of Signal (Local/Remote): 0 / 0 Loss of Power (Local/Remote): 0 / 0 Loss of Link (Remote): - Error Seconds (Local/Remote): 0 / 0 FEC Errors (Up/Down): 0 / 0 CRC Errors (Up/Down): 0 / 0 HEC Errors (Up/Down): 0 / 0

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Lizard Networks

#1554725 18-May-2016 11:37

You could probably manage a 17a line on that connection if your lucky.

broadcom chipset is quite a positive thing, your upstream is still hurting a fair bit there. downstream is impressive though for the distance. master filter installed already?

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hotrok

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#1554769 18-May-2016 13:11

yes master filter already in as far as I know. Not sure why the upstream is a little iffy; internal wiring? but I would of thought d/l would suffer as well

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hio77

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#1554818 18-May-2016 13:58

often upstream is a clear indicator of faults, but yes for your distance and line your downstream stats are really good.

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hotrok

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#1560078 26-May-2016 14:41

71 mb down and 12 up on speedtest to auckland. ping 35

So looks like really good stats on my line. I note ping has jumped by 10 over adsl which may settle with time. One question in the modem (hg630b) settings for vdsl it has dsl latency path 0 and path 1 both ticked does this improve latency or has no effect on it?

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#1560079 26-May-2016 14:47

hotrok:

71 mb down and 12 up on speedtest to auckland. ping 35

So looks like really good stats on my line. I note ping has jumped by 10 over adsl which may settle with time. One question in the modem (hg630b) settings for vdsl it has dsl latency path 0 and path 1 both ticked does this improve latency or has no effect on it?

your on what sounds like DLM-2/4/6 these have a latency profile of 8ms, based off those speeds likely 8b 9dB snr and i suspect you might fall over to 17a there.

post your full stats if you want us to comment more deeply on it

The DSLAM sets your latency, you cant do anything about it. DLM decides what profile for you to be on.

EDIT:

on second thought, sounds more like a 16ms profile to be that high, assuming you are in auckland.

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hotrok

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#1560208 26-May-2016 18:19

Timaru; so ping on original adsl to auckland was 33; after fibre to the cabinet 24 ; after vdsl 34

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#1560215 26-May-2016 18:26

im not up on raw latencys from there to auckland. sound like 8ms though.

tracert zeus.jetstream.co.nz should be about 14~16ms to the first hop assuming your isp terminates within the local area..

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mentalinc

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#1560229 26-May-2016 19:37

wow jetstream, that brings back the memories!

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#1560230 26-May-2016 19:38

mentalinc:

wow jetstream, that brings back the memories!

its still my favourite target point for consistency.

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hotrok

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#1560837 27-May-2016 15:55

at work at the moment in Timaru. Fibre at work

Tracing route to zeus.jetstream.co.nz [203.96.91.28]
over a maximum of 30 hops:

1 <1 ms <1 ms 1 ms 192.8***etc
2 7 ms 5 ms 5 ms 125-239-249-1.jetstream.xtra.co.nz [125.239.249.
1]
3 * * * Request timed out.
4 29 ms 30 ms 29 ms zeus.jetstream.co.nz [203.96.91.28]

Trace complete.

Interesting my ping to the same server at work was 35 to auckland with fibre. The VDSL is the same but when I was on an adsl1 profile but fibre to the cabinet (22km out of town in the sticks) my ping was 24. Does the transistion to adsl2/vdsl or fibre increase ping as it gains more latency at the cabinet? Or is Timaru got some funky exchange stuff going on?

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