Another update to say that FEC is rising at its usual pace. I'm more interested to see if the rate of errored seconds gradually becomes worse after a day or so though - like before.
Without having the device in my hands its a bit hard to say but im guessing the figure you have set relates to how much the db on any frequency has to change before bitswap interferes (adjusts things).
The higher the figure the more get shifted once bitswap comes into play. Which equates to more work for the device to do, which in turn can make the performance lag.
When its set at something like 1db the changes would be more frequent but more subtle (less noticeable) and thus less work for the device. This is not right but to simplify it more if you think of it like files on a computer, moving a 1kb file is done quicker and with less processing load than moving a 10000kb file.
If i had to guess the higher you set that figure the more even (level) a db chart (like the ones that have been posted earlier in the thread) will look but but the device is having to shift things in bigger lumps to do it.
Out of interest can you connect if you disable bitswap entirely and if so what effect does that have? If you can im guessing it either results in A) lower attainable and thruput rate (IE connection speeds) B) lower connection speeds + more errors or C) just more errors but same speed?
If DISABLING bitswap results in A) then bitswap is likely working properly, if its B) then bitswap works but not correctly. if its C) bitswap is not working properly at all.
Also does the device have a trelis or similar setting? and if so what happens if you enable or disable that?
Just a quick question, i cant seem to log into the meditek page using 169.254.0.1 in my browser, but can get in with telnet. What am i forgetting?
nothing ... with firmware 2155 & later they have removed or changed the ip address
near-end path0 fec: 1762
near-end path0 crc: 219
near-end fec sec: 173
near-end err sec: 172
near-end ses sec: 0
near-end los sec: 0
near-end ua sec: 0
far-end path0 fec: 55
far-end path0 crc: 4
far-end fec sec: 20
far-end err sec: 4
far-end ses sec: 0
far-end los sec: 0
far-end ua sec: 0
fwVer= FwVer:5.5.1.126_B_A60901 HwVer:T14.F7_0.1
lineState=up
Opmode=ITU G.993.2(VDSL2)
SNRMarginDown=13.9 dB
AttenDown=10.4 dB
SNRMarginUp=12.4 dB
AttenUp=0.1 dB
DataRateDown=56035 kbps
DataRateUp=20000 kbps
FECDown=1762
FECUp=55
CRCDown=219
CRCUp=4
HECDown=0
HECUp=0
ADSLUpTime= 8:40, 12 secs
ADSLActiveTime=0 min, 19 secs
PowerDown=13.0 dbm
PowerUp=6.2 dbm
AttainUp=29442
AttainDown=69860
InterleaveDepth=1
AdslStandard=VDSL2
AdslType=ANNEX_B
@babis3g have you at any (sorry if i missed the post) time played with any Seemless Rate Adaption setting (SRA) that can have weird effects like you chart shows.
SRA if there is a setting for that in recent firmwares for everyone AFAIK should be "off" or "disabled" NO UK ISP supports SRA on ADSL and i imagine it is the same for VDSL connections. SO anyone that has that set to "enabled" should alter that to "disabled".
A normally easy way on ADSL to tell if SRA is playing a roll in bad tone charts is in some stats recording software measure the noise margin every few (say 30) seconds. If it fluctuates madly by about 2-5(ish) db up and down and draws a wobbly chart line then the first thing you should check is that SRA is "disabled" as on ADSL the algorithm is not compatible with UK based ADSL services. In parts of Europe it is often used so i spose its possible that it has been enabled as the "default" setting.
I'd say it's not fixed - applied 2158 firmware, killed spectrum process and within 10 minutes had > 11,000 CRC errors downstream. Fastpath now on both downstream and upstream as shown by InterleaveDepth=1. As I can only go by the text file stats, I can't see what this translated to in terms of ES and/or SES.
Not wanting another DLM intervention, reverted back to OR modem so hopefully nothing will change overnight.
Odd. Interesting though. I imagine if it's exactly like I had before I killed spectrum, probably up to 120 ES/SES combined.
I presume you had bitswapping enabled?
near-end path0 fec: 18770
near-end path0 crc: 5301
near-end fec sec: 423
near-end err sec: 422
near-end ses sec: 23
near-end los sec: 0
near-end ua sec: 58
far-end path0 fec: 88
far-end path0 crc: 9
far-end fec sec: 36
far-end err sec: 9
far-end ses sec: 0
far-end los sec: 0
far-end ua sec: 0
fwVer= FwVer:5.5.1.126_B_A60901 HwVer:T14.F7_0.1
lineState=up
Opmode=ITU G.993.2(VDSL2)
SNRMarginDown=13.9 dB
AttenDown=10.4 dB
SNRMarginUp=12.4 dB
AttenUp=0.1 dB
DataRateDown=56035 kbps
DataRateUp=20000 kbps
FECDown=18770
FECUp=88
CRCDown=5301
CRCUp=9
HECDown=0
HECUp=0
ADSLUpTime=13:58, 0 secs
ADSLActiveTime=0 min, 19 secs
PowerDown=13.0 dbm
PowerUp=6.2 dbm
AttainUp=29362
AttainDown=70104
ShowtimeStart=19
TotalStart=333
InterleaveDepth=1
AdslStandard=VDSL2
AdslType=ANNEX_B
@bitsNbobs: Hopefully. Interesting, which Cisco/Linksys models support it? Are they by any chance VDSL2 capable or just ADSLx only?
out of interest for you next experiment so to speakInterestingly you'll notice that the downstream FEC is being used even though the connection is fastpath, similar to how upstream seems to do that. Presumably it's related to using a higher SNRM.
I have test and with SRA enabled and disabled, there is not really much change but right now i am down in greece with adsl
Is only when bit swap enable will lower my SNR
When had my n55u enabling SRA it give me little lower ping but that was 2 years ago when i was with TalkTalk (adsl)
That seems is not the case with the ac68u
I have now disable the SRA & see if will make difference again with another firmware
My hg612 (i still have from TT, unlocked) it has SRA enabled & dynamic SOS (both must works together in combination) ... so it must be supported by dslam, BT & huawei or alcatel lucent (where they got most of their modems/dslams), i am sure have teamed very well for the UK FTTC & seems they have calculate/adjust each single setting/effect for their service ... so i don't think is enabled for nothing ... but the hg612 is designed for vdsl connections ... it seems no logic such an important setting (SRA/dynamic sos) not been in use when they know many lines will have noise ... but this is my own speculation
The long time i am watching the forums (including BT ones) because the hf612 have adjusted so smooth for UK FTTC, in most cases if are any issues they know must be from the line (that is why an engineer coming out in most cases) and not from modem
tc login: admin
Password:
tc>tcapi get Info_Adsl lineState ;wan vdsl2 show mgcnt ;tcapi show Info_Adsl
up
outDiscards=0
inDiscards=0
outBytes=329734
inBytes=139460
outPkts=644
inPkts=598
fwVer= FwVer:5.5.1.126_B_A60901 HwVer:T14.F7_0.1
lineState=up
Opmode=ITU G.993.2(VDSL2)
SNRMarginDown=5.9 dB
AttenDown=9.9 dB
SNRMarginUp=9.1 dB
AttenUp=0.1 dB
DataRateDown=72038 kbps
DataRateUp=20000 kbps
WanListMode=1
FECDown=38
FECUp=0
CRCDown=6
CRCUp=0
HECDown=0
HECUp=0
ADSLUpTime=2 min, 35 secs
ADSLActiveTime=0 min, 19 secs
PowerDown=12.5 dbm
PowerUp=4.9 dbm
ATURID=26005443434e0000
ATUCID=b5004946544eb204
AttainUp=25196
AttainDown=85984
ShowtimeStart=19
TotalStart=19
ATURANSIRev=0
ATUCANSIRev=0
ATURANSIStd=0
ATUCANSIStd=0
InterleaveDepth=1
AdslStandard=VDSL2
AdslType=ANNEX_B
mtenStandard=G.dmt.bisplus (Annex L)
tc>tcapi get Info_Adsl lineState ;wan vdsl2 show mgcnt ;tcapi show Info_Adsl
up
outDiscards=0
inDiscards=0
outBytes=2069172
inBytes=257496
outPkts=2175
inPkts=1618
fwVer= FwVer:5.5.1.126_B_A60901 HwVer:T14.F7_0.1
lineState=up
Opmode=ITU G.993.2(VDSL2)
SNRMarginDown=5.9 dB
AttenDown=9.9 dB
SNRMarginUp=9.1 dB
AttenUp=0.1 dB
DataRateDown=72038 kbps
DataRateUp=20000 kbps
WanListMode=1
FECDown=48
FECUp=0
CRCDown=8
CRCUp=0
HECDown=0
HECUp=0
ADSLUpTime=3 min, 44 secs
ADSLActiveTime=0 min, 19 secs
PowerDown=12.5 dbm
PowerUp=4.9 dbm
ATURID=26005443434e0000
ATUCID=b5004946544eb204
AttainUp=25258
AttainDown=86248
ShowtimeStart=19
TotalStart=19
ATURANSIRev=0
ATUCANSIRev=0
ATURANSIStd=0
ATUCANSIStd=0
InterleaveDepth=1
AdslStandard=VDSL2
AdslType=ANNEX_B
mtenStandard=G.dmt.bisplus (Annex L)
tc>tcapi get Info_Adsl lineState ;wan vdsl2 show mgcnt ;tcapi show Info_Adsl
up
outDiscards=0
inDiscards=0
outBytes=8199280
inBytes=599250
outPkts=6735
inPkts=4414
fwVer= FwVer:5.5.1.126_B_A60901 HwVer:T14.F7_0.1
lineState=up
Opmode=ITU G.993.2(VDSL2)
SNRMarginDown=5.9 dB
AttenDown=9.9 dB
SNRMarginUp=9.2 dB
AttenUp=0.1 dB
DataRateDown=72038 kbps
DataRateUp=20000 kbps
WanListMode=1
FECDown=48
FECUp=0
CRCDown=8
CRCUp=0
HECDown=0
HECUp=0
ADSLUpTime=5 min, 8 secs
ADSLActiveTime=0 min, 19 secs
PowerDown=12.5 dbm
PowerUp=4.9 dbm
ATURID=26005443434e0000
ATUCID=b5004946544eb204
AttainUp=25310
AttainDown=86840
ShowtimeStart=19
TotalStart=19
ATURANSIRev=0
ATUCANSIRev=0
ATURANSIStd=0
ATUCANSIStd=0
InterleaveDepth=1
AdslStandard=VDSL2
AdslType=ANNEX_B
mtenStandard=G.dmt.bisplus (Annex L)
tc>tcapi wan vdsl2 show mgcnt ;tcapi show Info_Adsl
outDiscards=0
inDiscards=278
outBytes=33465651
inBytes=1437917
outPkts=24715
inPkts=14564
fwVer= FwVer:5.5.1.126_B_A60901 HwVer:T14.F7_0.1
lineState=up
Opmode=ITU G.993.2(VDSL2)
SNRMarginDown=5.9 dB
AttenDown=9.9 dB
SNRMarginUp=9.2 dB
AttenUp=0.1 dB
DataRateDown=72038 kbps
DataRateUp=20000 kbps
WanListMode=1
FECDown=197236
FECUp=0
CRCDown=15998
CRCUp=0
HECDown=0
HECUp=0
ADSLUpTime=7 min, 59 secs
ADSLActiveTime=0 min, 19 secs
PowerDown=12.5 dbm
PowerUp=4.9 dbm
ATURID=26005443434e0000
ATUCID=b5004946544eb204
AttainUp=25379
AttainDown=87812
ShowtimeStart=19
TotalStart=19
ATURANSIRev=0
ATUCANSIRev=0
ATURANSIStd=0
ATUCANSIStd=0
InterleaveDepth=1
AdslStandard=VDSL2
AdslType=ANNEX_B
mtenStandard=G.dmt.bisplus (Annex L)
tc>tcapi get Info_Adsl lineState;sleep 1;wan vdsl2 show mgcnt;sleep 1;tcapi show
Info_Adsl
up
outDiscards=0
inDiscards=313
outBytes=81515776
inBytes=3355775
outPkts=58173
inPkts=33700
fwVer= FwVer:5.5.1.126_B_A60901 HwVer:T14.F7_0.1
lineState=up
Opmode=ITU G.993.2(VDSL2)
SNRMarginDown=6.0 dB
AttenDown=9.9 dB
SNRMarginUp=9.2 dB
AttenUp=0.1 dB
DataRateDown=72038 kbps
DataRateUp=20000 kbps
WanListMode=1
FECDown=637146
FECUp=0
CRCDown=53777
CRCUp=0
HECDown=0
HECUp=0
ADSLUpTime=11 min, 5 secs
ADSLActiveTime=0 min, 19 secs
PowerDown=12.5 dbm
PowerUp=4.9 dbm
ATURID=26005443434e0000
ATUCID=b5004946544eb204
AttainUp=25314
AttainDown=88152
ShowtimeStart=19
TotalStart=19
ATURANSIRev=0
ATUCANSIRev=0
ATURANSIStd=0
ATUCANSIStd=0
InterleaveDepth=1
AdslStandard=VDSL2
AdslType=ANNEX_B
mtenStandard=G.dmt.bisplus (Annex L)
tc>