Specifications

Release Notes for Cisco uBR904 Cable Access Router for Cisco IOS Release 12.0(7)T 17
Downloading Specific Cisco IOS Images
Note An easy way to do this on UNIX is to make sure the “ios.cfg” file is in /tftpboot;
then enter the following command: chmod 777 ios.cfg
Step 4 Start an Internet browser, such as NetScape 4.08, and create a generic DOCSIS
configuration file by using the Cisco configuration file editor of your choice. Cisco
provides a number of tools to help automate this process.
Step 5 Follow the instructions provided in the specific Cisco tool. Select the starting point for
your configuration file, for example, bronze.cm, silver.cm, gold.cm, platinum.cm. This
populates the configuration file with default provisioning values.
Correctly populate the following two fields:
• Vendor ID (hexadecimal)—The vendor ID field is typically the first three octets of the
Cisco uBR904 cable access router’s MAC address as found on the label of the unit.
• Vendor Specific Information Field (dotted-decimal)—This is referred to as the VSIF
field.
Note DOCSIS configuration files work on the “TLV” basis—meaning Type, Length,
Value. Use the Cisco configuration file editor tool of your choice to help automate the
specification. Most Cisco tools include online help.
To download a specific Cisco IOS image to a group of Cisco uBR904 cable access
routers, you can define an Organizationally Unique Identifier (OUI) and use this OUI to
make the Cisco uBR904 cable access routers pay attention to the Vendor ID and VSIF. A
global OUI can be used—“0-0-c.”
(a) To install a file called “Cisco ios.cf” on 10 Cisco uBR904 cable access routers
(assuming a mixture of OUIs exist on those 10 units such as “00-50-7b,”
“00-10-7d”, and so on), use the configuration file editor of your choice and specify
“0-0-c” in the Vendor ID field.
(b) Tell the Cisco uBR904 cable access routers that they must get the file called “ios.cf”
through TFTP. You do this with the VSIF field. Calculate the “dotted-decimal”
equivalent of the ASCII characters: i o s . c f
Use a Sun workstation or any UNIX box and enter:
unix-workstation%man ascii