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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RSP-MP message in accordance with DOCSIS specifications (MULPIv3.0 Annex C.1.5.1.7.) When this feature is disabled, the
modem chooses to use either unicast or broadcast opportunities.
Note: If this feature is enabled, all 46.7 TLVs sent will have a value of 2 (unicast). If it is disabled, all 46.7 TLVs will have a
value of 3 (either unicast or broadcast). Not all modems support unicast ranging for non-primary US channel acquisition.
The CLI command to enable this feature is:
configure cable global unicast-np-us-acquisition
Use the no version of the command to disable the feature:
configure cable global unicast-np-us-acquisition no
This feature is disabled by default.
Some brands of modems may react more slowly than others when beginning to acquire their upstream(s) using unicast
ranging opportunities. Such modems will see several ranging opportunities sent out over a period of a few seconds before
they respond to them. It is also possible that non-compliant modems may not understand the 46.7 TLV or may not be able
to acquire their non-primary upstreams using only unicast opportunities.
Partial Service Handling
Partial service is a term used to indicate that service to a particular bonding-capable modem is in a degraded state, such
that data cannot or should not be transmitted across some of the channels associated with the modem. The C4/c CMTS
provides mechanisms for detecting, reporting, and recovering from some common partial service conditions.
Upstream Impairment Detection and Recovery
When upstream partial service occurs during the process of modem registration, the modem will remain in partial service
until the modem re-registers. If the underlying cause of the original partial service condition was related to impairment or
noise on the channel, the modem could register with partial service again. If, however, the cause of the original
impairment was due to resource contention during registration, it is possible for the modem to re-register with full service.
For each upstream channel in the modem’s TCS that successfully ranges, it will continue to periodically range on all
channels. If the modem fails to respond to 16 consecutive station maintenance opportunities on any channel, as may occur
if the channel becomes impaired, the C4/c CMTS will discontinue providing transmit opportunities to that modem on that