This line should be enabled per upstream interface: "cable upstream 0 ingress-noise-cancellation 100". You can check with:
Cisco: Test if ingress noise cancellation is enabled
# show run all | inc ingress
cable upstream 0 ingress-noise-cancellation 100
cable upstream 1 ingress-noise-cancellation 100
Cable interface line cards [..] contain advanced hardware-based noise cancellation circuitry that digitally removes in-channel impairments such as ingress, common path distortion, and certain types of impulse noise. To configure how often these line cards should train their noise cancellation circuity, so as to adapt to changes in the noise types and levels, use the cableupstreamingress-noise-cancellation command.