It's a legitimate configuration, but could also indicate problems.
Could be ingress in the 50.5MHz -> 56.9MHz range, there's an amateur radio channel there, or could be using some 16QAM and some 64QAM channels intentionally to reduce load on the upstream optics.
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Quote:
Originally Posted by Sephiroth
When they did that, the downstream power jumped from -3.5dBmv to +3.5 dBmv. (Upstreasm stayed the same-ish). Ordinarily I'd have said they'd changed the amp in my street cabinet - except that they clearly haven't because it was an overnight reset when that happened.
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Depending on what you're connected to they may have changed some kit within the hub to connect you to a new Edge QAM and return path line card. Hosted on same CMTS so retaining existing DHCP scope, just CCAP equipment change.
EDIT: Not entirely related but I saw a guy mentioning 20 downstream channels on the Cisco 10k. Yes, possible, but improbable. To go past 10 channels requires installation of a 3 Gb SPA, and as far as I know these have only been used to go to 12 channels to permit release of Homeworks+. VM aren't doing a big investment in these, purchasing the bare minimum in fact, as they are getting shot of the 10ks as part of migration to CCAP. These are being used as an interim solution while issues like power, space and cooling are sorted to make room for the CCAP kit and higher density, dedicated M-CMTS.
People on 20 channels are on E6k or cBR-8 unless there were a very strange set of circumstances that required a very non-standard configuration.