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
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Cisco IOS Release 12.2(15)CZ
Step 4 Copy the DOCSIS 1.1 configuration file to your TFTP server.
Step 5 Configure your DOCSIS cable provisioning software (such as a DHCP server or Cisco Network
Registrar) so that it sends the DOCSIS 1.1 configuration file as the DHCP bootfile during the initial
provisioning.
Step 6 Restart the router, either by turning it off and then back on, or by using the reload command in privileged
EXEC mode.
When the router or Cisco CVA122 Cable Voice Adapter is restarted, it downloads the DOCSIS 1.1
configuration file, which forces the router to download the Cisco IOS Release 12.2(15)CZ software
image using the DOCSIS secure software download. The router then reloads and boots the Cisco IOS
Release 12.2(15)CZ image.
Downloading the Image After Initialization Through SNMP
You can download a new software image to a DOCSIS 1.1 cable modem by setting the following SNMP
attributes in the DOCS-CABLE-DEVICE-MIB:
• docsDevSwServer—Specifies the IP address for the Software Upgrade TFTP Server.
• docsDevSwFilename—Specifies the fully qualified Software Upgrade Filename. This attribute has
a maximum size of 64 characters, so if the fully qualified filename is larger than this, you must move
the file to a different subdirectory so that the full filename is 64 bytes or fewer.
• docsDevSwAdminStatus—Sets to 1 (upgradeFromMgt) to initiate the secure software download
procedure, using the current values in the docsDevSwServer and docsDevSwFilename attributes.
You can monitor the status of the download by polling the docsDevSwOperStatus attribute, which
returns 1 (inProgress) while the download is progressing and 3 (completeFromMgt) when the download
is complete. You can also enable Secure Software Download traps using the snmp-server enable traps
docsis-cm command, so that the SNMP manager is notified when the download succeeds.
Note If you have not already downloaded the required CVCs to the router, you must also do that now by setting
TLVs 32 or 33 in the DOCSIS configuration file. See “Configuring for Secure Software Download”
section on page 24 for more information. If you do not load the CVCs into the cable modem before
sending the SNMP commands, the download fails with an error status.
Configuring for Provisioned Quality-of-Service
To use provisioned quality-of-service (PQoS) for outgoing VoIP calls, configure the outgoing dial-peer
with the req-qos command, and optionally with the ip qos dscp command. The following example
shows an H.323v2 dynamic mapping configuration for an outgoing dial peer that uses the Registration,
Admission, and Status (RAS) protocol to allow a remote gatekeeper to translate phone numbers (E.164
addresses) to the IP addresses of the specific dial peers.
Note The information in this section applies only to the Cisco CVA122 Cable Voice Adapter and the
Cisco uBR925 cable access router. Complete VoIP configuration information is given in the
Cisco IOS Voice, Video, and Fax Configuration Guide, Release 12.2T.