C3000Z modem, VDSL2 service nominally 80/10. Every few weeks the modem will disconnect completely, requiring a power cycle. But the strange thing is DSL0 has relatively low SNR, but the connection is stable. DSL1 has healthier SNR but experiences frequent retrains and has very high CRC error counts.
I'm assuming this indicates intermittent noise on the DSL1 line, but is there anything else in these stats I'm missing? Centurylink has been less than helpful because a reboot fixes things, for a while.
DSL0
xdslctl0: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 9421 Kbps, Downstream rate = 51829 Kbps
Bearer: 0, Upstream rate = 5504 Kbps, Downstream rate = 44275 Kbps
Link Power State: L0
Mode: VDSL2 Annex A
VDSL2 Profile: Profile 8a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 7.3 13.9
Attn(dB): 13.1 0.0
Pwr(dBm): 17.0 8.2
Total time = 39 days 1 hours 19 min 26 sec
FEC: 353182 0
CRC: 33 0
ES: 5 0
SES: 0 0
UAS: 25 25
LOS: 0 0
LOF: 0 0
LOM: 0 0
Retr: 0
HostInitRetr: 0
FailedRetr: 0
DSL1
xdslctl1: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 4991 Kbps, Downstream rate = 55249 Kbps
Bearer: 0, Upstream rate = 3203 Kbps, Downstream rate = 35133 Kbps
Link Power State: L0
Mode: VDSL2 Annex A
VDSL2 Profile: Profile 8a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 11.5 14.2
Attn(dB): 15.2 0.0
Pwr(dBm): 16.8 8.9
Total time = 39 days 1 hours 19 min 26 sec
FEC: 549448948 3684607
CRC: 224151 11055
ES: 121298 1270
SES: 81889 16777407
UAS: 66154 1077
LOS: 4 160
LOF: 19 160
LOM: 0 0
Retr: 30
HostInitRetr: 0
FailedRetr: 2
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