Cisco Cisco IOS Software Release 12.1(7)CX

This document describes the support for version 1.1 of the Data Over Cable System Interface 
Specifications (DOCSIS) in Cisco IOS Release 12.1(7)CX1 for the Cisco uBR7200 series universal 
broadband routers. This document focuses on the new software and the changes to the existing software 
architecture that provide DOCSIS 1.1 support. This document also describes Cable Modem Termination 
System (CMTS) to Cable Modem interoperability and provides instructions for migrating from 
DOCSIS 1.0 to DOCSIS 1.1.

This document includes the following sections:

DOCSIS 1.1 support for the Cisco uBR7200 series routers initially appeared in Cisco IOS 
Release 12.1(4)CX. Cisco IOS Release 12.1(7)CX1 adds support for a number of new and updated 
DOCSIS 1.1 MIBs, including a new command-line interface (CLI) command that provides access to 
some attributes in the subscriber management MIB.