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. 575
Subscriber Management Off
If IP Packet Filtering / Subscriber Management is turned off, then a single CM can have the following maximums:
64 total CPE IPv6 addresses
32 total CPE IPv4 addresses
The user cannot reconfigure these limits if Subscriber Management is disabled. The show cable modem detail command
output will show "IPv4 Addr=32, IPv6 Addr=64". See a sample system output in the Show Logging History Command (page
566) section.
Subscriber Management On
If IP Packet Filtering / Subscriber Management is turned on, then a single CM can have the following default maximums:
16 total CPE IPv6 addresses
16 total CPE IPv4 addresses
The user can reconfigure these limits in the CLI or in the CM configuration file. To change the default maximums, use the
following commands:
For IPv6: configure cable submgmt default v6-max-cpe <0-64>
For IPv4: configure cable submgmt default max-cpe <0-32>
Per-Interface Configuration
Per-interface IP packet filtering configuration applies only to IPv4 packets. It can be used to set packet filters for modems
and CPEs based on the IP address or VRF that references the IPv4 address space for the modem or device.
Default Filter Groups
When a cable modem or CPE is assigned an IPv4 address, the C4/c CMTS determines default IP filter groups in the
following order:
1. First, the modem configuration file can have TLVs for that modem and its CPE device types that instruct the C4/c CMTS
to set up IP packet filtering.
2. If these TLVs are not present, then the C4/c CMTS checks to see if per-interface IP packet filters have been configured.
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