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

Cisco IOS Release 12.2(15)CZ

Figure 5 Entering the M-CVC into Cisco Broadband Conﬁgurator Release 4.0

Tip Enter the hexadecimal digits of the public key separated either by spaces or by hyphens, and without a

“0x” hexadecimal prefix. The public key must contain exactly 128 hexadecimal bytes.

You can also create an ASCII file and use the DOCSIS Configurator tool to convert it into the binary

DOCSIS configuration file. However, if the M-CVC contains more than 254 bytes, you must break it

apart into successive fields, with each field except the last containing exactly 254 bytes.

The following shows a typical example of an M-CVC that is greater than 254 bytes:

32 (Manufacturer CVC) = 30 A2 4E 23 ... F1 C5 (exactly 254 bytes)

32 (Manufacturer CVC) = 21 36 A4 9F ... 3E 13 (exactly 254 bytes)

32 (Manufacturer CVC) = 0F 12 13 (254 bytes or less)

If you are using Release 3.7 or later of the DOCSIS Configurator tool, you can also specify TLV 320,

which allows you to specify the location of the actual M-CVC binary file on the local disk. The

Configurator then reads the file and saves the CVC as part of the DOCSIS configuration file. This avoids

having to convert the CVC into a hexadecimal format, as shown above.

For example, if you are running the DOCSIS Configurator on a Windows workstation, and you have

saved the M-CVC in the file D:\CiscoM.cvc, use the following line into the ASCII file:

320 (Manufacturer CVC) = D:\CiscoM.cvc