Occasional disconnects..

[Inkblot]

I have always had the odd loss of connection, usually only once a month or so, in fact I had one yesterday morning:

Sun 2010-03-28 07:01:19 ADSL link down  
Sun 2010-03-28 07:01:21 ADSL G.994 training  
Sun 2010-03-28 07:01:31 ADSL G.992 started  
Sun 2010-03-28 07:01:38 ADSL G.992 channel analysis  
Sun 2010-03-28 07:01:44 ADSL G.992 message exchange  
Sun 2010-03-28 07:01:44 ADSL link up, interleaved, us=786, ds=13686  
Sun 2010-03-28 07:02:11 WAN connection restarted, please check your internet settings  
Sun 2010-03-28 07:02:13 WAN CHAP authentication success

This morning same thing - same time of day as well:

Mon 2010-03-29 07:12:14 ADSL link down  
Mon 2010-03-29 07:12:15 ADSL G.994 training  
Mon 2010-03-29 07:12:25 ADSL G.992 started  
Mon 2010-03-29 07:12:32 ADSL G.992 channel analysis  
Mon 2010-03-29 07:12:38 ADSL G.992 message exchange  
Mon 2010-03-29 07:12:39 ADSL link up, interleaved, us=786, ds=11888  
Mon 2010-03-29 07:12:52 WAN connection restarted, please check your internet settings  
Mon 2010-03-29 07:12:54 WAN CHAP authentication success

It's unusal for this to happen two mornings on the trot and it isn't really a problem (Other than my online game hanging in the middle of a bossfight) but is it likely to be anything I can change or is it just 'one of those things' that I need to live with? There is nothing I can think of that happens here that would likely cause a problem - it's a static environment, no power surges (Everything is on surge-protector extensions anyway) and it always comes back up again in a minute or less but like all these things, if it's avoidable I'd like to avoid it!

[Steve]

Looks like you lost a bit of downstream speed as well. What's the router stats looking like?

[Inkblot]

adslctl: ADSL driver and PHY status
Status: ShowtimeRetrain Reason:   1
Channel: FAST, Upstream rate = 786 Kbps, Downstream rate = 11888 Kbps
Mostly Greek to me I'm afraid...

Link Power State:  L0
Mode:      ADSL2+
Channel:      Fast
Trellis:      U:ON /D:ON
Line Status:   No Defect
Training Status:   Showtime
      Down      Up
SNR (dB):   6.0      4.8
Attn(dB):    34.0      16.8
Pwr(dBm):   21.0      12.4
Max(Kbps):   14392      19643
Rate (Kbps):   11888      786

[Rik]

Have you got any error counts available, Inky?

[Inkblot]

Thanks Steve, Rik.

Not sure if this tells us anything or not:


         G.dmt framing
K:      175(0)      33
R:      14      16
S:      1      2
D:      64      8
         ADSL2 framing
MSGc:      63      24
B:      174      32
M:      1      2
T:      2      4
R:      14      16
S:      0.4697      2.6666
L:      3219      246
D:      64      8
         Counters
SF:      625070      253225
SFErr:      17      2781
RS:      86259736   2308620
RSCorr:      48337      1632086
RSUnCorr:   333      0

HEC:      15      1231
OCD:      0      0
LCD:      0      0
Total Cells:   284012429   3108573423
Data Cells:   398645      40559905
Drop Cells:   0
Bit Errors:   0      131187

ES:      4132      649
SES:      286      94
UAS:      61      281
AS:      10130

INP:      1.11      2.08
PER:      16.20      40.00
delay:      7.51      5.33
OR:      34.06      6.00

Bitswap:   1495      130

Total time = 1 days 19 hours 29 min 52 sec
SF  = 63124979
CRC = 21362
LOS = 2
LOF = 18
ES  = 4132
Latest 1 day time = 19 hours 29 min 52 sec
SF  = 4336798
CRC = 18395
LOS = 1
LOF = 9
ES  = 2589
Latest 15 minutes time = 14 min 52 sec
SF  = 55024
CRC = 0
LOS = 0
LOF = 0
ES  = 0
Previous 15 minutes time = 15 min 0 sec
SF  = 55581
CRC = 1
LOS = 0
LOF = 0
ES  = 1
Previous 1 day time = 24 hours 0 sec
SF  = 5342118
CRC = 755
LOS = 1
LOF = 9
ES  = 175
15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
SF  = 55519
CRC = 0
LOS = 0
LOF = 0
ES  = 0
15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
SF  = 55520
CRC = 1
LOS = 0
LOF = 0
ES  = 1
15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
SF  = 55581
CRC = 1
LOS = 0
LOF = 0
ES  = 1
Showtime Drop Reason:   1
Last Retrain Reason:   1

[Rik]

Those don't look too high, so shouldn't cause a problem. I suspect there's just a burst of noise triggering the resync, ADSL2+ being more sensitive in this respect than Max was.

[Steve]

I wonder what the margin was for the previous higher sync @ 13686

[Rik]

Good question, Steve.