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Author Topic: DLM reduced my line?  (Read 2954 times)

adslmax

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DLM reduced my line?
« on: March 01, 2019, 04:26:09 PM »

I just noticed DLM had resync just after 1:25pm today (very disappointed with massive huge 8701Kbps knocked off from 80000Kbps)  :( :'(

Code: [Select]
xDSL
Mode VDSL2
Traffic Type PTM
Status Up
Link Power State L0
Downstream Upstream
Line Coding (Trellis) On On
SNR Margin (dB) 6.1 12.1
Attenuation (dB) 11.6 0.0
Output Power (dBm) 12.5 0.0
Attainable Rate (Kbps) 71571 22147
Rate (Kbps) 71299 19999

DSLAM type / SW version:   BDCM:0xa48c (164.140) / v0xa48c
Modem/router firmware:     AnnexA version - A2pv6F039g1.d24m
DSL mode:                  VDSL2 Profile 17a
Status:                    Showtime
Uptime:                     2 hours 59 min 22 sec
Resyncs:                   1 (since 01 Mar 2019 13:25:45)
         
            Downstream   Upstream
Line attenuation (dB):     11.6      0.0
Signal attenuation (dB):   Not available on VDSL2      
Connection speed (kbps):   71299      19999
SNR margin (dB):           6.1      12.1
Power (dBm):               12.5      0.0
Interleave depth:          16      1
INP:                       48.00      0
G.INP:                     Enabled      Not enabled
Vectoring status:          5 (VECT_UNCONFIGURED)      

RSCorr/RS (%):             0.0000      0.0000
RSUnCorr/RS (%):           0.0000      0.0000
ES/hour:                   0      0

IP Profile has dropped too at 68.93Mbps

Do u think DLM will try lower SNR from 6dB to 3dB next step?
« Last Edit: March 01, 2019, 04:32:40 PM by adslmax »
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j0hn

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Re: DLM reduced my line?
« Reply #1 on: March 01, 2019, 06:38:10 PM »

DLM hasn't reduced your line and it probably wasn't a DLM initiated resync.
The line is connecting just shy of the attainable rate with no spare SNRM.
It's probably just another crosstalker.

It would be better in future if you posted the output of xdslcmd info --stats rather than the 2 sets of stats you posted. It provides much more info.
It can also be copy/posted from DslStats rather than having to telnet in with Putty.
You will find it under "Telnet Data > Connection Stats"

Every time your line has dropped below 80Mb in the past it has returned to the full 80Mb within a relatively short time frame.
DLM may not lower the SNRM target for a while (if at all).
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adslmax

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Re: DLM reduced my line?
« Reply #2 on: March 01, 2019, 08:46:40 PM »

Thanks but I don't think it won't go back to 80 meg now because the dsl checker has changed from 78 to 68 over the last five years now.
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CarlT

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Re: DLM reduced my line?
« Reply #3 on: March 01, 2019, 09:18:05 PM »

Seems a good attitude to have in that case - not worrying about it.
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adslmax

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Re: DLM reduced my line?
« Reply #4 on: March 02, 2019, 12:49:21 PM »

My dsl checker say Downstream Handback Threshold(Mbps) are 63.4 but this mean I can't raise the fault to my isp until the sync rate went below 63Meg is that correct?
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vultura

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pooclah

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Re: DLM reduced my line?
« Reply #6 on: March 02, 2019, 08:04:58 PM »


My dsl checker say Downstream Handback Threshold(Mbps) are 63.4 but this mean I can't raise the fault to my isp until the sync rate went below 63Meg is that correct?

Hi Max

Yes that is correct.

From an old post of yours

Quote
Max Rate 81069K
Sync Rate 79999K
SNR 3.1dB
G.INP Enabled

Now you're posting

Quote
SNR Margin (dB)   6.1   12.1
Attenuation (dB)   11.6   0.0
Output Power (dBm)   12.5   0.0
Attainable Rate (Kbps)   71571   22147
Rate (Kbps)   71299      19999

Have you been trying 'to improve your connection' again and upset the DLM?

Kevin
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adslmax

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Re: DLM reduced my line?
« Reply #7 on: March 02, 2019, 10:54:07 PM »

Hi Max

Yes that is correct.

From an old post of yours

Now you're posting

Have you been trying 'to improve your connection' again and upset the DLM?

Kevin

No I haven't touch anything!
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CarlT

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Re: DLM reduced my line?
« Reply #8 on: March 03, 2019, 02:44:19 PM »

Best guess DLM wasn't happy with performance at the 3dB margin and returned it to standard settings. If it sees improvements it'll reduce the margin accordingly.

Whomever wrote the software and web pages that allow people to monitor pages like the BT Wholesale availability checker for changes and receive emails for relatively minor adjustments to their rate adaptive xDSL services goes right alongside the dude who produced software allowing people to obsessively speed test their services hourly in having a lot to answer for.
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WiFi: Nighthawk® AX12 RAX120
Routing: Mikrotik CCR2004-1G-12S+2XS
Switching: Mikrotik 2 * CRS305-1G-4S-IN, 2 * CRS309-1G-8S+; 1 * CSS326-24G-2S+RM
Exchange: Wakefield
ISP: BT Full Fibre 900. Zen Full Fibre 900. Faelix FTTP 300

adslmax

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Re: DLM reduced my line?
« Reply #9 on: March 04, 2019, 03:50:06 AM »

Rather surprise my line got both interleaved ON after resync around 1:40am today

Downstream   Upstream
Line attenuation (dB):     11.5      0.0
Signal attenuation (dB):   Not available on VDSL2      
Connection speed (kbps):   78451           20000
SNR margin (dB):           6.6      14.1
Power (dBm):               12.4      -0.6
Interleave depth:          8      8
INP:                       46.00      47.00
G.INP:                     Enabled      Enabled





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tiffy

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Re: DLM reduced my line?
« Reply #10 on: March 04, 2019, 05:32:38 PM »

Yes, you certainly have US G.Inp applied now, as you have not supplied stats as j0hn suggested earlier can't really say why this has occured, most likely a sharp increase in US ES rate.

From my experience on the lines I monitor, US G.Inp application is now more likely or perhaps more obviously, periods of increased US ES rates beyond a defined threshold will activate a DLM re-synch and apply US G.Inp as per normal expectation.

See recent post on my observations regarding US G.Inp application showing definitive US ES & CRC rates prior to application:
https://forum.kitz.co.uk/index.php/topic,23099.msg391893.html#msg391893

   
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CarlT

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Re: DLM reduced my line?
« Reply #11 on: March 04, 2019, 06:26:45 PM »

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WiFi: Nighthawk® AX12 RAX120
Routing: Mikrotik CCR2004-1G-12S+2XS
Switching: Mikrotik 2 * CRS305-1G-4S-IN, 2 * CRS309-1G-8S+; 1 * CSS326-24G-2S+RM
Exchange: Wakefield
ISP: BT Full Fibre 900. Zen Full Fibre 900. Faelix FTTP 300

vultura

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Re: DLM reduced my line?
« Reply #12 on: March 04, 2019, 07:26:23 PM »

To have such speeds is just a dream for me......
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tubaman

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Re: DLM reduced my line?
« Reply #13 on: March 04, 2019, 07:29:59 PM »

To have such speeds is just a dream for me......
Ditto.   :(
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g3uiss

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Re: DLM reduced my line?
« Reply #14 on: March 04, 2019, 08:16:46 PM »

And another ditto.....20/2 best I can get  >:(
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