Hi,
Long time lurker but first post. I was hoping if someone could explain some of the statistics I am seeing on my FTTC VDSL line with a new Vigor 130 I have just purchased?
Firstly, I have had the line for 4+ years now and been running the BT ECI B-Focus and a Netgear D7000 (v1) for a number of years without any issues. I am a reasonable distance from the cabinet and have (according to the D7000) been getting sync rates of 64000-65000 Kbps which have always been stable. I assume the same rate with the ECI, the DSLAM's are Huawei BDCM. Speedtest sites would agree with this.
So I am reorganising my network, with a Linux router and didn't want to use the Netgear any longer to avoid double-NAT, but the ECI doesn't give me line stats, so I thought I would go the Vigor 130 route.....
So, as Draytek state default settings should work in UK I replaced the ECI with 130. Immediately observed training issues, and the line stability went out the window. Left it overnight and observed several flaps. Faulty 130 ?
So after some googling I tried altering SNR, but could seem to get the line stable, reverted back to the ECI and all stable again. Eventually I saw a post regarding disabling the 130 vectoring.....
vdsl optn g.vector off
vdsl rebootLine went stable..... at a higher than normal sync rate.
I have established that vectoring is on in the cab from Draytek guide:
https://www.draytek.co.uk/support/guides/kb-dsl-ginp ------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) --------
Near End Far End Note
...
ReTxEnable : 0 1
...The line has been stable since, however the 130 is reporting an SNR of 0 (db) on both sides - I thought this would cause some stability issues, but it continues to be stable. An SNR below 6db should be causing issues I believed, so was hoping you guys could shed some light on what is going on with my line, I have included the various reports from the 130 below:
VDSL2 Information (VDSL2 Firmware Version: 576D17_A/B/C )
Profile State UP Speed Down Speed SNR Upstream SNR Downstream
17A SHOWTIME 16201 (Kbps) 67141 (Kbps) 0 (dB) 0 (dB)
> sys ver
Router Model: Vigor130 Version: 3.8.4_BT English
Profile version: 3.0.0 Status: 1 (0x495137dc)
Router IP: 192.168.2.1 Netmask: 255.255.255.252
Firmware Build Date/Time: Sep 13 2018 13:40:44
Router Name:
Revision: 76500 V376
Current VDSL2 Firmware Version: 05-07-06-0D-01-07
ADSL Firmware Version: 05-07-02-08-00-01 Annex A
VDSL2 Firmware Version: 05-07-06-0D-01-07
> vdsl status
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Running Mode : 17A State : SHOWTIME
DS Actual Rate : 67141000 bps US Actual Rate : 16201000 bps
DS Attainable Rate : 61573532 bps US Attainable Rate : 16201000 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 1 US Interleave Depth : 1
NE Current Attenuation : 16 dB Cur SNR Margin : 0 dB
DS actual PSD : 6. 7 dB US actual PSD : 15. 6 dB
NE CRC Count : 16470 FE CRC Count : 7857
NE ES Count : 3370 FE ES Count : 2710
Xdsl Reset Times : 0 Xdsl Link Times : 1
ITU Version[0] : fe004452 ITU Version[1] : 41590000
VDSL Firmware Version : 05-07-06-0D-01-07 [with Vectoring support]
Power Management Mode : DSL_G997_PMS_L0
Test Mode : DISABLE
-------------------------------- ATU-C Info ---------------------------------
Far Current Attenuation : 18 dB Far SNR Margin : 5 dB
CO ITU Version[0] : b5004244 CO ITU Version[1] : 434db12d
DSLAM CHIPSET VENDOR : < BDCM >
> vdsl status more
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Near End Far End Note
Trellis : 1 1
Bitswap : 1 1
ReTxEnable : 0 1
VirtualNoise : 0 0
20BitSupport : 0 0
LatencyPath : 0 0
LOS : 0 0
LOF : 0 0
LPR : 0 0
LOM : 0 0
SosSuccess : 0 0
NCD : 0 0
LCD : 0 0
FECS : 0 1201699 (seconds)
ES : 3373 2710 (seconds)
SES : 230 184 (seconds)
LOSS : 0 3 (seconds)
UAS : 40 27240 (seconds)
HECError : 0 0
CRC : 16491 7857
RsCorrection : 0 0
INP : 0 195 (symbols)
InterleaveDelay : 0 21 (1/100 ms)
NFEC : 254 32
RFEC : 14 16
LSYMB : 4312 16
INTLVBLOCK : 127 32
AELEM : 0 ----
> vdsl snr
delta: SNR margin delta. The SNR margin delta should range from -50 to 50.
delta=1 means 0.1dB.
Current VDSL SNR Margin is 0 dB.
Current VDSL SNR Margin delta setting is 0.Many thanks