Re: PoE, Comcast Modems, and Service Outages

[Jay Hennigan <jay () west net>]

On 3/30/22 10:52, Livingood, Jason via NANOG wrote:

> Could well be from noise ingress - lots of work goes into finding & fixing ingress issues. Hard to say unless we look 
> in detail at the connection in question and the neighborhood node.

Packet loss absolutely could be noise ingress. That's measurable in 
terms of s/n ratio and it's on the outside plant HFC side.

But noise doesn't "build up", and PoE is DC, and PoE is on the LAN side, 
separated from Comcast's equipment by a router. Level 1 Comcast guy is 
simply wrong.

--
Jay Hennigan - jay () west net
Network Engineering - CCIE #7880
503 897-8550 - WB6RDV