I guys, i have CASA C40g ,I currently analyzing a problem I have with an upstream physical port where when enabling the ingress cancellation command, the FEC and SNR corrections go crazy, with jumps from SNR 10 to 42 and uFEC more than 15%. If I disable this option everything is normal.
Question, will I have damaged the hardware related to noise cancellation in that physical port or is it something software?
the hardware should be fine, curious on what you get for an output for
show upstream burst-noise
please confirm upstream hardware and software your running on the C40g
All other fisical ports are fine with ingress-cancel ON, this ports in question fail recently, work well for more than a year.
Module 4 UPS Running (16 ports, 4 phy chans/port, 2 log chans/phy chan,scdma map 00)
Docsis channel: 64
Major rev 3, Minor rev 7
Serial_No: Part_No: PCA-0045-01
CFE version 12.4.11
Uptime: 63 d, 4 h, 14 m, 33 s
------------------------------------------------
with ingress-cancellation 100:
CASA-C40G(config-if-ups 4/10.2)#show upstream 4/10.2/0 burst-noise
Burst Noise Stats for Channel 4/10.2/0:
Burst noise event rate: 0.1 events/second.
Percentage of Correctable Burst Events: 0 %
Percentage of Uncorrectable Burst Events: 100 %
Burst Duration (microseconds) % of Events Max Power (in dB)
----------------------------- ----------- -----------------
0 to 1 0 0
1 to 3 0 0
3 to 10 0 0
10 to 50 100 40
50 to 500 0 0
500 to 2000 0 0
2000 to 10000 0 0
10000 to 50000 0 0
> 50000 0 0
without ingress-cancel
CASA-C40G(config-if-ups 4/10.2)#show upstream 4/10.2/0 burst-noise
Burst Noise Stats for Channel 4/10.2/0:
Burst noise event rate: 0.0 events/second.
Percentage of Correctable Burst Events: 0 %
Percentage of Uncorrectable Burst Events: 0 %
Burst Duration (microseconds) % of Events Max Power (in dB)
----------------------------- ----------- -----------------
0 to 1 0 0
1 to 3 0 0
3 to 10 0 0
10 to 50 0 0
50 to 500 0 0
500 to 2000 0 0
2000 to 10000 0 0
10000 to 50000 0 0
> 50000 0 0