Had another resync earlier on, not sure why as nothing had changed as far as I could see. Not wanting to risk there perhaps being an issue with the Draytek, I've gone back to using a Zyxel 1312-B10A. Mainly so I can monitor a bit more in depth with DSLStats.
adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 16656 Kbps, Downstream rate = 79793 Kbps
Bearer: 0, Upstream rate = 16707 Kbps, Downstream rate = 66854 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): 6.2 6.0
Attn(dB): 19.3 0.0
Pwr(dBm): 13.3 6.9
VDSL2 framing
Bearer 0
MSGc: 18 16
B: 51 238
M: 1 1
T: 64 3
R: 12 16
S: 0.0247 0.4554
L: 20688 4480
D: 1309 1
I: 64 255
N: 64 255
Counters
Bearer 0
OHF: 6434807 1362271
OHFErr: 5 2
RS: 1647151205 3987352
RSCorr: 5094 6
RSUnCorr: 221 0
Bearer 0
HEC: 47 0
OCD: 0 0
LCD: 0 0
Total Cells: 1315472608 0
Data Cells: 8753828 0
Drop Cells: 0
Bit Errors: 0 0
ES: 1 1
SES: 0 0
UAS: 28 3608
AS: 10234
Bearer 0
INP: 3.00 0.00
INPRein: 0.00 0.00
delay: 8 0
PER: 1.59 7.54
OR: 120.74 23.33
AgR: 66974.38 16730.25
Bitswap: 4/4 1/1
Total time = 2 hours 51 min 2 sec
FEC: 5094 6
CRC: 5 2
ES: 1 1
SES: 0 0
UAS: 28 3608
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 6 min 2 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
Previous 15 minutes time = 15 min 0 sec
FEC: 51 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 2 hours 51 min 2 sec
FEC: 5094 6
CRC: 5 2
ES: 1 1
SES: 0 0
UAS: 28 3608
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 = 2 hours 50 min 33 sec
FEC: 5094 6
CRC: 5 2
ES: 1 1
SES: 0 0
UAS: 0 3580
LOS: 0 0
LOF: 0 0
LOM: 0 0
NTR: mipsCntAtNtr=0 ncoCntAtNtr=0
>
Noticed that the interleave depth is higher with the Zyxel. 1309 vs 872 with the Draytek.