Chapter 14: Cable-side Configuration
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 405
Upstream to Downstream Channel Association
For each logical upstream channel, DOCSIS requires that certain signaling information be carried downstream to the CM
population.
Upstream Channel Descriptor Messages
This signaling consists of Upstream Channel Descriptor (UCD) messages that contain:
Parameters that help the CMs to find and utilize the channel.
Bandwidth allocation (MAP) messages that tell a CM when it can transmit upstream.
Together, for the purposes of provisioning, these two types of signaling are referred to as supervision.
Supervision
Supervision for each upstream channel in the MAC domain must be carried on one or more downstream channels in the
MAC Domain.
Provisioning
Supervision can be either provisioned by the operator or it will be automatically inserted on primary-capable downstreams
by the E6000 CER. If you want to be certain that all legacy cable modems can register on all downstream-upstream
combinations, then you must manually provision cable supervision.
Note: ARRIS recommends that you manually provision all cable supervision.
Guidelines
The following supervision guidelines apply:
Removing the last supervision assignment for a logical upstream channel will result in the upstream going to the
administrative "down" state.
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