I have Zen FTTC (Huawei), which has been working great for over 3 years with sync of ~80Mbit/sec / ~20Mbit/sec, and actual transfer around 76Mbit/sec / 18Mbit.
A few weeks ago I noticed speed tests were showing just 45Mbit/sec / 12Mbit/sec. Last night I got round to having a look and got the following stats (I had to flash the open HG612 firmware, hence no history).
# xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 32090 Kbps, Downstream rate = 83296 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 54999 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 15.4 15.5
Attn(dB): 13.3 0.0
Pwr(dBm): 12.8 3.0
VDSL2 framing
Bearer 0
MSGc: -6 26
B: 227 237
M: 1 1
T: 0 42
R: 12 16
S: 0.1319 0.3781
L: 14562 5374
D: 4 1
I: 240 127
N: 240 254
Q: 4 0
V: 0 0
RxQueue: 132 0
TxQueue: 33 0
G.INP Framing: 18 0
G.INP lookback: 31 0
RRC bits: 0 24
Bearer 1
MSGc: 122 -6
B: 0 0
M: 2 0
T: 2 0
R: 16 0
S: 8.0000 0.0000
L: 32 0
D: 1 0
I: 32 0
N: 32 0
Q: 0 0
V: 0 0
RxQueue: 0 0
TxQueue: 0 0
G.INP Framing: 0 0
G.INP lookback: 0 0
RRC bits: 0 0
Counters
Bearer 0
OHF: 0 885088
OHFErr: 8292 12
RS: 1120204988 1254024
RSCorr: 3082126 40
RSUnCorr: 0 0
Bearer 1
OHF: 2307859 0
OHFErr: 0 0
RS: 18462381 0
RSCorr: 255983 0
RSUnCorr: 0 0
Retransmit Counters
rtx_tx: 217427491 0
rtx_c: 5050784 0
rtx_uc: 17628 0
G.INP Counters
LEFTRS: 3188 0
minEFTR: 53788 0
errFreeBits: 29864213 0
Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 3765963191 0
Data Cells: 54565242 0
Drop Cells: 0
Bit Errors: 0 0
Bearer 1
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 0 0
Data Cells: 0 0
Drop Cells: 0
Bit Errors: 0 0
ES: 2494 12
SES: 83 0
UAS: 28 28
AS: 37069
Bearer 0
INP: 51.00 0.00
INPRein: 1.00 0.00
delay: 0 0
PER: 0.00 3.98
OR: 0.01 64.22
AgR: 55120.28 20063.54
Bearer 1
INP: 2.00 0.00
INPRein: 2.00 0.00
delay: 0 0
PER: 16.06 0.01
OR: 63.75 0.01
AgR: 63.75 0.01
Bitswap: 11440/11440 4/4
Total time = 10 hours 18 min 17 sec
FEC: 3082126 40
CRC: 8292 12
ES: 2494 12
SES: 83 0
UAS: 28 28
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 3 min 17 sec
FEC: 6521 0
CRC: 14 0
ES: 5 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 29116 0
CRC: 45 0
ES: 23 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 10 hours 18 min 17 sec
FEC: 3082126 40
CRC: 8292 12
ES: 2494 12
SES: 83 0
UAS: 28 28
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 1 day time = 0 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 10 hours 17 min 47 sec
FEC: 3082126 40
CRC: 8292 12
ES: 2494 12
SES: 83 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
The thing that stands out for me is: Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 54999 Kbps
I'm afraid I'm not experienced in reading the stats to fully understand if this Bearer result is a cause or affect.
Can someone give me any pointers for investigating further or has Zen/Openreach simply capped my line?