VDSL Performance & Tuning

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274 posts

Ultimate Geek

#843661 24-Jun-2013 21:55

SamF: Try: connection, statecheck, system

I had a quick look through those, nothing of interest from what I can see.

sidefx

3711 posts

Uber Geek

Trusted

#843664 24-Jun-2013 22:01

try:
xdsl info expand=enabled

"I was born not knowing and have had only a little time to change that here and there." | Octopus Energy | Sharesies
- Richard Feynman

JonoNZ

274 posts

Ultimate Geek

#843667 24-Jun-2013 22:03

sidefx: try:
xdsl info expand=enabled

Ok, some more details now!

{Administrator}=>xdsl info expand=enabled
Physical Layer Statistics:

Modem state: up
Up time (Days hh:mm:ss): 1 day, 17:51:29
xDSL Standard: ITU-T G.993.2
Channel Mode: Interleaved

Number of reset: 2

Chipset Vendor info (G.994.1): Local Remote
Country code: B500 B500
ID: BDCM IKNS
Specific: 0000 0001

System Vendor info (showtime): Local Remote
Country code: 0F00 0000
ID: TMMB ----
Specific: 3C61 0000

Bearers generic info DS US
Payload rate [Kbps]: 47805 10341
Attenuation [dB]: 11.0 22.8
Margins [dB]: 11.7 18.1
Output power [dBm]: 13.5 -4.2

Number of bearers: 1
Bearer 0 DS US
INP [DMT symbols]: 1.00 1.00
Delay [ms]: 8.00 8.00
Depth []: 201 0.00
R: 16 0

G.997.1 Statistics (Current):

Failures:
Line failures Near end
Loss of signal (LOS): 10
Loss of frame (LOF): 9
Loss of power (LPR): 0

Performance monitoring:
Line PM: Near end
Error second (ES): 34

Channel PM: Near end Far end
Bearer 0:
Code Violation (CV): 11 1
FEC: 2852 8

ATM data path PM: Near end Far end
Bearer 0:
HEC violation count (HEC): 97 N/A

G.997.1 Statistics (last 15 minutes):

Failures:
Line failures Near end
Loss of signal (LOS): 0
Loss of frame (LOF): 0
Loss of power (LPR): 0

Performance monitoring:
Line PM: Near end
Error second (ES): 0

Channel PM: Near end Far end
Bearer 0:
Code Violation (CV): 11 1
FEC: 2852 8

ATM data path PM: Near end Far end
Bearer 0:
HEC violation count (HEC): 97 N/A

G.997.1 Statistics (last 24 hours):

Failures:
Line failures Near end
Loss of signal (LOS): 0
Loss of frame (LOF): 0
Loss of power (LPR): 0

Performance monitoring:
Line PM: Near end
Error second (ES): 1

Channel PM: Near end Far end
Bearer 0:
Code Violation (CV): 11 1
FEC: 2852 8

ATM data path PM: Near end Far end
Bearer 0:
HEC violation count (HEC): 97 N/A

{Administrator}=>

sidefx

3711 posts

Uber Geek

Trusted

#843668 24-Jun-2013 22:04

INP [DMT symbols]: 1.00 1.00
Delay [ms]: 8.00 8.00

EDIT: DLM4 I think

"I was born not knowing and have had only a little time to change that here and there." | Octopus Energy | Sharesies
- Richard Feynman

JonoNZ

274 posts

Ultimate Geek

#843669 24-Jun-2013 22:06

sidefx:

INP [DMT symbols]: 1.00 1.00
Delay [ms]: 8.00 8.00

EDIT: DLM4 I think

Based on my other stats, would you expect that to improve?

Thanks for your help, btw!

sidefx

3711 posts

Uber Geek

Trusted

#843670 24-Jun-2013 22:09

How are your CRC errors looking on the web interface?

"I was born not knowing and have had only a little time to change that here and there." | Octopus Energy | Sharesies
- Richard Feynman

JonoNZ

274 posts

Ultimate Geek

#843677 24-Jun-2013 22:11

sidefx: How are your CRC errors looking on the web interface?

My sync rate increased by about 3000kbit/s on Sunday (to 47805), but here are my current other stats from the web UI:

DSL Connection

Link Information

Uptime: 1 day, 17:59:39

DSL Type: ITU-T G.993.2

Bandwidth (Up/Down) [kbps/kbps]: 10,341 / 47,805

Data Transferred (Sent/Received) [B/B]: 0 / 0

Output Power (Up/Down) [dBm]: 429496725.4 / 13.5

Line Attenuation (Up/Down) [dB]: 22.8 / 11.0

SN Margin (Up/Down) [dB]: 18.1 / 11.7

System Vendor ID (Local/Remote): TMMB / ----

Chipset Vendor ID (Local/Remote): BDCM / IKNS

Loss of Framing (Local/Remote): 9 / 0

Loss of Signal (Local/Remote): 10 / 0

Loss of Power (Local/Remote): 0 / 0

Loss of Link (Remote): -

Error Seconds (Local/Remote): 34 / 0

FEC Errors (Up/Down): 8 / 2,852

CRC Errors (Up/Down): 1 / 11

HEC Errors (Up/Down): 0 / 97

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sidefx

3711 posts

Uber Geek

Trusted

#843679 24-Jun-2013 22:14

11 CRC errors in 1 day, 17 hours? Yeah, I'm pretty DLM will improve your profile, I'd think you'll get to DLM1 given time. Just leave it and try to avoid resyncs\power offs\etc.

"I was born not knowing and have had only a little time to change that here and there." | Octopus Energy | Sharesies
- Richard Feynman

JonoNZ

274 posts

Ultimate Geek

#843683 24-Jun-2013 22:17

sidefx: 11 CRC errors in 1 day, 17 hours? Yeah, I'm pretty DLM will improve your profile, I'd think you'll get to DLM1 given time. Just leave it and try to avoid resyncs\power offs\etc.

Cool, I'm avoiding restarts and power cycles. Do DLM changes occur weekly?

My install was Saturday 15th, first DLM change was Sunday 23rd:

Event log from modem:
----
Jun 23 04:11:19 xDSL linestate up (ITU-T G.993.2; downstream: 47805 kbit/s, upstream: 10341 kbit/s; output Power Down: 13.5 dBm, Up: -4.2 dBm; line Attenuation Down: 11.0 dB, Up: N/A dB; snr Margin Down: 12.0 dB, Up: N/A dB)

Jun 23 04:11:02 xDSL linestate down

Jun 15 11:08:20 CONFIGURATION mbus igd sync successfull

Jun 15 11:08:17 CONFIGURATION mbus atomic sync successful

Jun 15 10:07:58 xDSL linestate up (ITU-T G.993.2; downstream: 44665 kbit/s, upstream: 10347 kbit/s; output Power Down: 13.5 dBm, Up: -4.2 dBm; line Attenuation Down: 11.0 dB, Up: N/A dB; snr Margin Down: 12.0 dB, Up: N/A dB)
----

Jexlar

41 posts

Geek
Inactive user

#843693 24-Jun-2013 22:25

Wow, can anyone explain what the hell happened with my errors?

stevehodge

393 posts

Ultimate Geek

#843739 25-Jun-2013 00:53

JonoNZ: Cool, I'm avoiding restarts and power cycles. Do DLM changes occur weekly?

My install was Saturday 15th, first DLM change was Sunday 23rd:

The most common pattern seems to be a variable period of time before the first change and then several changes 2-3 days apart. So there's a pretty good change you'll get a resync tonight which should put you on DLM-2: 8ms delay with INP 0. And then hopefully a change to DLM-1 on Thursday morning.

It seems like there hasn't been much DLM activity at all for a while and then this last weekend there were quite a few changes for different people.

Jexlar

41 posts

Geek
Inactive user

#843757 25-Jun-2013 07:27

Gave it a restart this morning, only had it running 2 minutes so far, so the error rates aren't accurate, but I'm now on 7 attenuation and my sync is better.

JonoNZ

274 posts

Ultimate Geek

#843766 25-Jun-2013 08:04

Jexlar: Gave it a restart this morning, only had it running 2 minutes so far, so the error rates aren't accurate, but I'm now on 7 attenuation and my sync is better.

Interesting how my attenuation is 11dB but my sync speed is 47,805. I would have expected with 7db attenuation you would have a higher sync rate.

Jexlar

41 posts

Geek
Inactive user

#843770 25-Jun-2013 08:10

Are you connected directly to your incoming line?

JonoNZ

274 posts

Ultimate Geek

#843771 25-Jun-2013 08:11

Jexlar: Are you connected directly to your incoming line?

You mean with a master filter? If so, then yes -- with Cat5e run from the connection on the side of the house (standard Chorus install I believe).

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