Chapter 17: IP Packet Filters, Subscriber Management
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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u/d SFID SID State Sched Tmin Tmax DFrms DBytes CRC HCS Slot/Ports
uB 55 8198 Activ BE 0 0 0 0 0 0 1/2/0-3
dB 56 7 Activ 0 0 0 0 12/0/8-11
L2VPN per CM: (Disabled)
Current CPE=0, IPv4 Addr=0, IPv6 Addr=0 Max CPE=16, IPv4 Addr=32, IPv6 Addr=64
Upstream Drop Classifiers
The CM can perform Upstream IP protocol filtering (as defined in the DOCS-CABLE-DEVICE-MIB) using either IP filters or
Upstream Drop Classifiers. DOCSIS 3.0 expanded the concept of classifiers to encompass the filtering of upstream traffic in
CM. The legacy IP filtering in the CM did not support IPv6 filtering. An Upstream Drop Classifier is a Classifier provisioned in
the CM configuration file to filter upstream traffic that is either IPv4 or IPv6. If a packet matches the specified packet
matching criteria of an Upstream Drop Classifier, it is then dropped.
The mandatory part of Upstream Drop Classifiers is supported, specifically the enabling and disabling by the C4/c CMTS of
statically provisioned Upstream Drop Classifiers in the CM configuration file at registration time.
Note: The C4/c CMTS does not support sending of the Upstream Drop Classifiers configuration to the CM based on the
Upstream Drop Classifiers Group IDs sent to the system during registration. Also, the C4/c CMTS does not support
dynamically modifying Upstream Drop Classifiers on the CM via DSC messages.
Provisioning
When Upstream Drop Classifiers are provisioned in the CM configuration file, in order for the CM to use them, the C4/c
CMTS must also be configured to allow their use.
If the capability is disabled on the C4/c CMTS, during registration the C4/c CMTS will signal to the CM that Upstream Drop
Classifiers cannot be used, and legacy IP filters will be used instead. The CM can only use legacy IP filters or Upstream Drop
Classifiers, but not both at the same time to filter IPv4 traffic only.
US Drop Classifier Commands
The following command is used to enable/disable Upstream Drop Classifier operation:
configure interface cable-mac <mac-id> [no] cable upstream-drop-classifiers enable