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Author Topic: ASUS DSL-AC68U (VDSL modem/router)  (Read 296716 times)

ardsar

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #120 on: October 20, 2014, 10:34:12 PM »

No not on the eci or hh5. I've gone back to the old firmware that seemed more stable and less crc errors.
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Ixel

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #121 on: October 21, 2014, 12:03:23 AM »

No not on the eci or hh5. I've gone back to the old firmware that seemed more stable and less crc errors.

So far 693 is the only version I can get stable here, some CRC errors still as well. I am considering trying 2048, 2049 and 2050 this evening to see if any of those are as stable, but I'm equally concerned that DLM might have a surprise waiting for me in the early hours of the morning.
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simoncraddock

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #122 on: October 21, 2014, 06:12:38 AM »

I can't understand why I'm now very stable on 2072 and you guys have loads of problems with crc errors. Even during the first week of struggling to maintain a 5 min connection I've never received any crcs.

Everything seems to point to underlying line problems if your using the exact same setting as me as I'm now at 30 hours and holding steady with a synch of 76/20.
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Fritzbox 7490 l Plusnet FTTC

ardsar

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ASUS DSL-AC68U (VDSL modem/router)
« Reply #123 on: October 21, 2014, 06:55:13 AM »

I don't think it's line problems as such. I'm approx 1km from the cabinet and therefore can only sync to 30MB max. S/N under this condition plays a large part as in the evenings it drops below 6. On a clean line such as yours you have plenty of headroom and hence a much cleaner line with no interference.

I've gone back to the old firmware and it's been up for 8 hours with only 90 crc errors.
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ardsar

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #124 on: October 21, 2014, 08:58:23 AM »

No not on the eci or hh5. I've gone back to the old firmware that seemed more stable and less crc errors.

So far 693 is the only version I can get stable here, some CRC errors still as well. I am considering trying 2048, 2049 and 2050 this evening to see if any of those are as stable, but I'm equally concerned that DLM might have a surprise waiting for me in the early hours of the morning.

Agreed, 693 is the only version that is stable. Would appreciate your feedback on the other versions - looks like each one had a driver update for the xDSL part. I will try and do the same.
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Ixel

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #125 on: October 21, 2014, 09:13:20 AM »

I haven't tested 2048 to 2050 yet, but just posting to say that it looks like DLM has speed banded me, fortunately no interleaving though :). I suspect the speed band was caused by the re-syncing in the early hours of the morning on 2072. If I wait a couple of days to just over a week and limit my re-syncs to one per day, or none at all, I imagine my speed will return to normal again (hopefully).

An interesting note is that I'm wondering if DLM has two forms of capping, meaning:
- Speed bands are used depending on attainable rate, and also used if re-syncs occur too often
- Interleaving/INP/delay are used if the connection has a high ES (that exceeds the threshold defined by the DLM profile)

My current speed is 49/15. My speed band was 74/20.
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ardsar

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #126 on: October 21, 2014, 09:33:17 AM »

Just out of curiosity, how can you tell your speed band.

When DLM kicked in for me, it reduced my download to 20Mb (from around 27). However during the course of the week, it got removed and I was back to normal.
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Ixel

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #127 on: October 21, 2014, 09:51:25 AM »

Just out of curiosity, how can you tell your speed band.

When DLM kicked in for me, it reduced my download to 20Mb (from around 27). However during the course of the week, it got removed and I was back to normal.

Mainly due to the fact that my connection speed is stuck at that and I have a massive amount of SNRM and a higher attainable rate. If I had a Fritz!Box 7390 then it would show me the max and min DSLAM rates on downstream and upstream. When going through telnet and checking /tmp/adsl/info_adsl.txt I get the following:
Code: [Select]
fwVer= FwVer:5.5.1.20_B_A60901 HwVer:T14.F7_0.1

lineState=up
Opmode=ITU G.993.2(VDSL2)
SNRMarginDown=14.2 dB
AttenDown=0.1 dB
SNRMarginUp=25.6 dB
AttenUp=0.1 dB
DataRateDown=48999 kbps
DataRateUp=14993 kbps
WanListMode=1
FECDown=0
FECUp=0
CRCDown=34
CRCUp=0
HECDown=0
HECUp=0
ADSLUpTime=45 min, 43 secs
ADSLActiveTime=0 min, 21 secs
PowerDown=9.1 dbm
PowerUp=9.4 dbm
ATURID=26005443434e0000
ATUCID=b5004946544eb203
AttainUp=42208
AttainDown=81704
ShowtimeStart=21
TotalStart=63
ATURANSIRev=0
ATUCANSIRev=0
ATURANSIStd=0
ATUCANSIStd=0
InterleaveDepth=1
AdslStandard=VDSL2
AdslType=ANNEX_B
mtenStandard=G.dmt.bisplus
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Ixel

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #128 on: October 21, 2014, 02:06:42 PM »

So far my connection's holding for nearly 2 hours with version 2050. CRC's still exist in a small way but at least it's newer firmware, has the option for 'improved impulse noise protection' (which I believe is a future possibility with BT Openreach, right now it's not supported).

I think I might write a very basic app to measure the possible ES and the CRC rate, perhaps by a graph too. Best way I think is to use telnet and read the info_adsl.txt file in the /tmp/adsl/ directory, every second or two if possible.

Current Settings
Code: [Select]
DSL modulation: VDSL
Annex mode: Annex A
Stability Adjustment (ADSL): Disabled
Stability Adjustment (VDSL): Disabled
Tx Power Control (VDSL): Disabled
Rx AGC GAIN Adjustment (VDSL): Stable
UPBO - upstream power back off (VDSL): Auto
SRA (Seamless Rate Adaptation): Disabled (BT doesn't support this yet anyway, as far as I know)
Bitswap: Enabled
VDSL Profile: Multimode 17a
Improved Impulse Noise Protection (G.998.4): Enabled
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ardsar

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #129 on: October 21, 2014, 03:26:17 PM »

I will give version 2050 a run this evening.
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ardsar

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #130 on: October 21, 2014, 05:23:43 PM »

I will give version 2050 a run this evening.

im being a noob - can you please tell me how to access that data whilst in telnet.  :-[
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Ixel

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #131 on: October 21, 2014, 05:47:27 PM »

I will give version 2050 a run this evening.

im being a noob - can you please tell me how to access that data whilst in telnet.  :-[

cat /tmp/adsl/info_adsl.txt

Code: [Select]
admin@DSL-AC68U:/www# cat /tmp/adsl/info_adsl.txt
outDiscards=405
inDiscards=119
outBytes=267257197
inBytes=595618661
outPkts=787770
inPkts=883777
fwVer= FwVer:5.5.1.124_B_A60901 HwVer:T14.F7_0.1

lineState=up
Opmode=ITU G.993.2(VDSL2)
SNRMarginDown=15.7 dB
AttenDown=10.2 dB
SNRMarginUp=15.6 dB
AttenUp=0.1 dB
DataRateDown=48999 kbps
DataRateUp=14993 kbps
WanListMode=1
FECDown=0
FECUp=2
CRCDown=362
CRCUp=0
HECDown=0
HECUp=0
ADSLUpTime= 5:28, 2 secs
ADSLActiveTime=0 min, 19 secs
PowerDown=11.9 dbm
PowerUp=5.6 dbm
ATURID=26005443434e0000
ATUCID=b5004946544eb203
AttainUp=29216
AttainDown=85696
ShowtimeStart=19
TotalStart=19
ATURANSIRev=0
ATUCANSIRev=0
ATURANSIStd=0
ATUCANSIStd=0
InterleaveDepth=1
AdslStandard=VDSL2
AdslType=ANNEX_B
mtenStandard=G.dmt.bisplus
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ardsar

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #132 on: October 21, 2014, 08:48:48 PM »

Updated to 2050. Initial sync went weird and threw up 1500 CRC's errors. It had another attempt and seems ok.

However the stats below show some serious error correction taking place. With the HH5, my down sync is usually around 26 - 27MB so I guess I shouldn't be surprised as the line is being pushed.

Interleave depth seems high.......

In 15 mins I have had 3 CRC errors.

Settings are as Ixel apart from Improved Impulse noise which I have disabled (didn't think BT had this???).


lineState=up
Opmode=ITU G.993.2(VDSL2)
SNRMarginDown=6.0 dB
AttenDown=18.5 dB
SNRMarginUp=0.0 dB
AttenUp=0.0 dB
DataRateDown=29884 kbps
DataRateUp=7692 kbps
WanListMode=1
FECDown=8466489
FECUp=0
CRCDown=1
CRCUp=0
HECDown=0
HECUp=0
ADSLUpTime=7 min, 53 secs
ADSLActiveTime=0 min, 15 secs
PowerDown=0.0 dbm
PowerUp=4.0 dbm
ATURID=26005443434e0000
ATUCID=b5004946544eb204
AttainUp=0
AttainDown=39820
ShowtimeStart=15
TotalStart=31
ATURANSIRev=0
ATUCANSIRev=0
ATURANSIStd=0
ATUCANSIStd=0
InterleaveDepth=433
AdslStandard=VDSL2
AdslType=ANNEX_B
mtenStandard=G.dmt.bisplus
« Last Edit: October 21, 2014, 09:03:24 PM by ardsar »
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Ixel

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #133 on: October 21, 2014, 09:33:54 PM »

...

Interesting. Also no, BT don't currently support it yet but they might do in the future. Disabling it is fine as far as I know. Your downstream power and upstream attainable rate are odd (glitched it looks like).

I've been up for over 9 hours with 434 downstream CRC errors.
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simoncraddock

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Re: ASUS DSL-AC68U (VDSL modem/router)
« Reply #134 on: October 22, 2014, 10:19:46 AM »

Well after approx. 58hrs up time I'm fairly happy and convinced disabling the  SRA option has stabilised my connection finally. Hopefully DLM will start restoring my speeds in the coming days. Fingers crossed the Asus maintains a stable connection.
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Fritzbox 7490 l Plusnet FTTC
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