Chapter 2: C4/C4c CMTS Features
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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Dynamic Service Class Modifications will provide a capability to hitlessly and dynamically change the downstream or
upstream service class parameters in use by a modem by reassigning the updated service class parameters to the modem
via a CLI command.
IPv6 PCMM Support for Voice will allow the use of IPv6 in PCMM (i.e. SIP-based) voice applications.
Automatic Card Recovery for DC Voltage adds a second set of thresholds for each voltage monitor point on the XD, 12U,
and 24U CAMs. This second set of thresholds, which indicates that the voltage is further out of specification that the
existing thresholds, will be used to initiate recovery if the recovery action has been enabled for the monitor point.
Upstream Drop Classifier (UDC) Support will allow a modem to use UDCs. The UDC would be configured strictly via TLV in
the modem configuration file.
Support for Modem Loss of AC Power (reduce to 1x1) will provide functionality to reduce an MxN bonded modem to a
1x1 configuration upon receipt of the "loss of AC power" CM Status message from that modem. It will also restore the
modem to the MxN configuration upon receipt of the "AC power restored" CM Status message from a given modem. This
feature will not apply, however, if at least one voice call is active on the modem.
Improved Partial Services (USCB primary upstream) will prevent a modem from re-ranging or re-registering (i.e. flapping)
when the primary upstream channel of a bonded modem becomes impaired provided that the modem is able to range on
another (non-primary) channel.
Policy-Based Routing (PBR) Recursive Next Hop will enhance the existing PBR feature to support configuration of a next
hop address which is not directly connected to the C4 CMTS. A recursive route look-up will be supported to obtain the
next-hop IP address. The RCM will forward the packet using the IP address obtained via look-up instead of the Destination
IP in the packet.
Any Source Multicast (ASM) with IGMPv3 on the Cable Side will accept ASM (*.G) joins on the cable side interfaces while
operating in IGMPv3 mode. IGMP Proxy will be used on the NSI side.
DSG Reset to Null will provide a single command to delete all DSG configuration information in the C4 CMTS without
affecting the DSG Service Class Name (SCN).
Source Interfaces will allow a non-loopback interface (which is currently used by default) to be configured as the
source IP address for AAA packets originating on the C4 CMTS. Other configuration defaults existing today (prior
to Release 8.2) for AAA will not be changed.
TCS Optimization for Static Upstream Bonding Groups will support optimization of a modem’s Transmit Channel Set (TCS)
such that the TCS contains only the channels defined in the static bonding group(s) assigned to the modem rather than all
