Specifications

DOCSIS 1.1 for Cisco uBR905 and Cisco uBR925 Cable Access Routers and Cisco CVA122 Cable Voice Adapters
How to Configure DOCSIS 1.1 Support
20
Cisco IOS Release 12.2(15)CZ
Note The service class is optional. The flow scheduling specification may always be provided in full; a service
flow may belong to no service class whatsoever. CMTS implementations may treat such unclassed flows
differently from classed flows with equivalent parameters.
Any service flow can have its QoS parameter set specified in any of three ways:
• By explicitly including all traffic parameters.
• By indirectly referring to a set of traffic parameters by specifying a service class name.
• By specifying a service class name along with modifying parameters.
The service class name is expanded to its defined set of parameters at the time the CMTS successfully
admits the service flow.
Secure Software Download
Secure software download ensures that the cable modem downloads only the proper software image from
a properly authenticated server. The software transfer is encrypted to prevent users and hackers from
intercepting the download and substituting their own software image in its place.
How to Configure DOCSIS 1.1 Support
The Cisco uBR905 and Cisco uBR925 cable access routers and Cisco CVA122 cable voice adapters
automatically support all DOCSIS 1.1 features when running Cisco IOS Release 12.2(15)CZ. Many
DOCSIS 1.1 features, however, must be specifically enabled through the DOCSIS configuration file that
is downloaded to the router at initialization time. Special configuration is also needed to use provisioned
quality-of-service (PQoS) for VoIP calls.
See the following sections for the configuration tasks for each feature. Each tasks in the list is identified
as either required or optional.
• Creating a DOCSIS 1.1 Configuration File, page 20 (Required)
• Performing a Secure Software Download, page 27 (Optional)
• Configuring for Provisioned Quality-of-Service, page 30 (Optional)
• Verifying the DOCSIS 1.1 Configuration, page 33 (Optional)
• Verifying the SNMPv3 Diffie-Hellman Configuration, page 34 (Optional)
Creating a DOCSIS 1.1 Configuration File
No special configuration is needed to enable basic DOCSIS 1.1 operation, but the DOCSIS configuration
file can be used to control which DOCSIS 1.1 features are enabled and used during a session.
In addition to enabling the different DOCSIS 1.1 features, special fields in the DOCSIS configuration
files are needed to enable SNMPv3 operation and to configure the router for the secure software
download procedure. The following sections describe these procedures:
• DOCSIS 1.1 Feature Configuration, page 21
• Configuring the SNMPv3 Diffie-Hellman Kickstart Public Key, page 22
• Configuring for Secure Software Download, page 24