Cisco Cisco IOS Software Release 12.1(7)CX

Feature Overview

DOCSIS 1.1 for Cisco uBR7200 Series Universal Broadband Routers

Cisco IOS Release 12.1(7)CX1

Feature Overview

DOCSIS 1.1 is the first major revision of the initial DOCSIS 1.0 standard for cable networks. Although
the initial standard provided quality data traffic over the coaxial cable network, the demands of real-time
traffic such as voice and video required many changes to the DOCSIS specification.

Note

At the time of publication, the DOCSIS 1.1 specification is still being finalized. This document
describes the DOCSIS 1.1 specification SP-RFIv1.1-IO3-991105. See the CableLabs web site
(http://www.cablelabs.com) for the current status on DOCSIS 1.1.

Feature History

Table 1

summarizes the history of the DOCSIS 1.1 for Cisco uBR7200 series routers feature set.

Table 1

Cisco IOS 12.1 CX Feature History

Release

Modification

12.1(4)CX

The DOCSIS 1.1 feature for Cisco uBR7200 series routers was introduced.

12.1(7)CX1

Several DOCSIS 1.1 MIBs were updated, reflecting changes in the DOCSIS 1.1
specification:

•

Revision 04 of DOCS-QOS-MIB—Describes the quality of service (QoS)
attributes.

Note

Release 12.1(4)CX implemented revision 02 of this MIB. Revision 04
includes substantial changes to the tables and attributes.

•

Revision 02 of DOCS-SUBMGT-MIB—Describes the subscriber management
attributes.

•

RFC2933—Describes the IGMP protocol attributes, as defined in RFC 2933.

•

DOCS-CABLE-DEVICE-MIB—Describes the operation of the CM and CMTS.
Only the syslog and Event tables are supported by this MIB, which was released
as RFC 2669.

•

DOCS-CABLE-DEVICE-TRAP-MIB—Defines the traps supported by CMs
and the CMTS and is an extension of DOCS-CABLE-DEVICE-MIB.

•

DOCS-IF-EXT-MIB—Extends RFC 2670 (DOCS-IF-MIB) to provide
information about whether CMs and the CMTS support DOCSIS 1.0 or 1.1.

The cable submgmt default command was also added, to set the default value of the
attributes in DOCS-SUBMGT-MIB.