Specifications

16 Release Notes for Cisco uBR904 Cable Access Router for Cisco IOS Release 12.0(7)T
Important Notes
To download an updated Cisco IOS image to a Cisco uBR904 cable access router installed in the
field, follow the procedure in “Downloading Specific Cisco IOS Images.”
Downloading Specific Cisco IOS Images
Normally, the CMTS system administrator uses the provisioning and billing system to set the
software upgrade filename, the IP address of the TFTP server where the software upgrade file exists,
and the MAC address of the Cisco uBR904 cable access router to upgrade in the field. Refer to the
procedure that follows.
Option 128 in the DOCSIS configuration file supports a vendor-defined attribute (type = 43) that lets
the system administrator define the name of a Cisco IOS image to download to a remote
Cisco uBR904 cable access router. This requires a unique DHCP policy for the Cisco uBR904 cable
access router, a unique DOCSIS configuration file to be sent by the DOCSIS process, and a unique
Cisco IOS image filename—such as “ios.cfg” file—located in the same TFTP server directory
supported by the DOCSIS process.
When the Cisco uBR904 cable access router initializes, Cisco IOS software processes the DOCSIS
configuration file. If the software upgrade option is present in the DOCSIS configuration file and if
the name of the Cisco IOS image in the DOCSIS configuration file differs from the image that is
currently running on the Cisco uBR904 cable access router, the router downloads the new Cisco IOS
image from the TFTP server and automatically reboots.
To download an updated Cisco IOS image via a DOCSIS configuration file:
Step 1 Create a file to send to the remote Cisco uBR904 cable access router by using a
configuration file editor of your choice. In that file, specify commands such as:
• hostname SUCCEED
• service linenumber
• enable password cisco
• interface ethernet 0
• load 30
• no shut
• line vty 0 4
• password cisco
• end
Step 2 Save the file by using a short name such as “ios.cf.”
Step 3 Ensure that file permissions allow the file to be sent by TFTP.
6
uBR904(config-if)#Ctrl-z
uBR904#copy running-config
startup-config
Building configuration...
Return to the privileged EXEC mode.
Save the configuration to nonvolatile RAM, so that it will not be
lost in the event of a reset, power cycle, or power outage.
Table 4 Configuring Operating Modes for the Cisco uBR904 Cable Access Router (continued)
Step Command Purpose