Chapter 22: Channel Bonding
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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configure interface cable-mac <int> cable cm-tcs-max-size <1-8> [no]
The [no] option sets the size limit to the default of zero.
Upstream Graceful TCS Reduction
When Graceful TCS Reduction is enabled and a power shortfall or DRW violation occurs, the CMTS will attempt to assign 2
channels to the modem's TCS. If the CMTS is unable to assign 2 channels due to a power shortfall or DRW violation, the
CMTS will assign a single channel to the modem's TCS.
When Graceful TCS Reduction is disabled and a power shortfall or DRW violation occurs, the CMTS assigns a single channel
to the modem's TCS.
Note: Graceful TCS Reduction is not performed when a new TCS is assigned via DBC with the
configure cable modem
move
command.
The CLI command to enable this feature is:
configure interface cable-mac <mac> cable upstream graceful-tcs-reduction
Use the NO version of the command to disable the feature:
configure interface cable-mac <mac> cable upstream graceful-tcs-reduction no
This feature is disabled by default.
Selective Enabling of USCB within a MAC Domain
When MTCM is enabled for a MAC domain, all modems that are capable of USCB will register with USCB enabled by
default. If there is a need to enable USCB for a subset of USCB capable modems within the MAC domain, the following
steps describe how to enable USCB selectively on modems while leaving it disabled on others within the same MAC
domain. Note that when USCB is enabled, Continuous Concatenation and Fragmentation (CCF) will be enabled on all
upstream flows except for UGS flows. When USCB is disabled, CCF is disabled on all upstream flows.
Note: Unsolicited Grant Service (UGS) flows are defined to be CCF flows with headers off.
1.
Allow USCB on the desired MAC domain(s) while leaving deployed modems unaffected.
configure cable global mtcm-conditional-override