Chapter 14: Cable-side Configuration
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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Shutdown the MAC domains before the changes are made and no shut the MAC domain after the changes are
made. When the modems register, they will be associated with a fiber node and will be able to recover from AC
power loss and be dynamically load balanced.
Shutdown and restore the MAC domains at a later time during a Maintenance window to re-register the modems.
Reset the modems by hand for those that need to be load balanced or recovered from AC power loss.
Note that these three options ensure that the modems will be able to load balance and be restored from AC power loss
after the changes are complete and the modem is reset.
Removing a Channel from a MAC Domain
When a channel is removed from a MAC domain, all the modems containing that channel in either its Transmit Channel
Set (TCS) or Receive Channel Set (RCS) are reset.
Note that removing channels from MAC domains should only be done during a Maintenance window.
Channel Sets
DOCSIS 3.0 provides a construct called a channel set to denote groupings of channels in the same direction from the same
MAC domain. These channel sets consist of a MAC-domain-unique channel set identifier and a list of either Upstream
Channel IDs (UCIDs) or Downstream Channel IDs (DCIDs), depending on the direction of the channels.
A channel set may be referenced by many different application contexts that require the grouping all at once. If a channel
set contains only one channel ID, then the channel ID is used as the channel set ID.
As the C4/c CMTS determines the service groups (MD-DS-SG, MD-US-SG, and MD-CM-SG), it creates and assigns a channel
set for the channels that comprise the service group.
The C4/c CMTS automatically creates and destroys channel sets as needed.
Show CLI Commands
The following are examples of the commands that display the various views for fiber nodes and service group related
information. For more information on these CLI commands see Command Line Descriptions.