Chapter 22: Channel Bonding
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 688
Ranking RCC Candidates
Once all of the candidate RCCs have been identified, the chassis ranks the RCC candidates in the following priority order:
1. Number of channels, ranked from largest to smallest
2. RCCs containing the CM’s current primary DS channel are given precedence over those without the current primary DS
channel
3. Configured RCCs are chosen ahead of dynamic RCCs
4. Meeting the above criteria the downstream channels chosen for the RCC will be those with the lightest utilization.
Selecting the Final RCC
The chassis makes its final choice for an RCC for the CM by considering the downstream service flows that are specified in
the CM’s configuration file. Any downstream service flow that is contained in the CM’s configuration file that does not
have the bonding bit set in the forbidden attribute mask is considered a bonded flow candidate by the chassis.
The C4/c CMTS selects an RCC that provides the largest bonding group channel set that satisfies the attribute masks of the
bonded service flows in the CM’s configuration file. If no RCC is found to satisfy the service flow attribute masks then the
highest ranked RCC is used. The RCC may be much bigger than any static downstream bonding groups that are configured.
Assignment Restrictions for DOCSIS 3.0 Modems
The following channel assignment restrictions for DOCSIS 3.0 modems apply:
Channel assignment TLVs (type 56) are ignored
Service Type TLVs (type 43.11) are ignored
CM attribute TLVs (type 43.9) are ignored.
If the C4/c CMTS finds no suitable RCC, then the CM is assigned a single US/DS.
Note: Special care must be taken in the assignment of upstream supervision to downstream channels. The C4/c CMTS will
not move a CM to a new upstream channel if supervision for the CM’s upstream channel is not carried by any of the
channels of an RCC.
To Next Page
Loading...