4-2
Cisco uBR10012 Universal Broadband Router Software Configuration Guide
OL-1520-05
Chapter4 Managing Cable Modems on the Hybrid Fiber-Coaxial Network
Activating CM Authentication
Note Cisco recommends using default values for most commands. The default values for the commands
used in these configuration steps are, in most cases, adequate to configure the
CiscouBR10012router.
Note For information about setting rate limiting on CMs, refer to these sections in Chapter 3:
•“Setting Downstream Rate Limiting and Traffic Shaping” section on page9
•“Setting Upstream Rate Limiting and Traffic Shaping” section on page24
Activating CM Authentication
The CiscouBR10012router can be configured to require all CMs to return a known text string to register
with the CMTS and gain access to the network. The text string can be from 1 to 80 characters in length.
To activate CM authentication, use the following command from cable interface configuration mode.
To configure authentication and data privacy parameters, use the cable shared-secret command in cable
interface configuration mode. To disable authentication during the CM registration phase, use the no
form of this command.
cable shared-secret [0 | 7] authentication-key
no cable shared-secret
Syntax Description
“Configuring the Dynamic Map
Advance Algorithm” section on
page8
Enhances the upstream throughput from a CM connected to the
CiscouBR10000series CMTS. The system employs a new
algorithm that automatically tunes the lookahead time in MAC
allocation and management messages (MAPs), based on several
input parameters for the corresponding upstream channel.
“Configuring Maximum Hosts
Attached to a CM” section on
page9
Specifies the maximum number of hosts that can be attached to a
subscriber’s CM.
“Configuring Per-Modem Filters”
section on page9 Provides instructions to configure the CiscouBR10012router to
filter incoming packets from individual hosts or cableinterfaces
based on the source Media Access Controller (MAC) or Internet
Protocol (IP) address.
“Configuring Sync Message
Interval” section on page10 Specifies the sync message interval between successive sync
message transmissions from the CiscouBR10000series CMTS.
Section Purpose
0(Optional) Specifies that an unencrypted message will follow.
7(Optional) Specifies that an encrypted message will follow.
authentication-key Text string is a shared secret string. When you enable the service
password-encryption option, the password is stored in encrypted form. The
text string is a 64-character authentication key.