Installation guide

5-2
Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide
OL-2238-03
Chapter 5 Troubleshooting the System
Managing Cable Modems on the HFC Network
Managing Cable Modems on the HFC Network
To manage cable modems connected to the network, perform the following tasks as appropriate:
• “Configuring Sync Message Interval” section on page 5-2
• “Activating Cable Modem Authentication” section on page 5-3
• “Activating Cable Modem Upstream Address Verification” section on page 5-3
• “Configuring Dynamic Contention Algorithms (Cable Insertion Interval, Range, and Data
Backoffs)” section on page 5-4
• “Configuring the Dynamic Map Advance Algorithm” section on page 5-5
• “Configuring Per Modem Filters” section on page 5-6
• “Configuring the Maximum Number of Hosts Attached to a Cable Modem” section on page 5-7
• “Configuring Cable Modem Registration Timeout” section on page 5-8
• “Clearing Cable Modem Reset” section on page 5-8
• “Clearing Cable Modem Counters” section on page 5-9
• “Configuring Traffic Shaping” section on page 5-9
• “Configuring Spectrum Management” section on page 5-11
Caution Cisco recommends using default values for most commands. Default settings are adequate for most
systems.
Configuring Sync Message Interval
To specify the sync message interval between successive sync message transmissions from the
Cisco uBR7100 series CMTS, use the following command in cable interface configuration mode.
Verifying Sync Message Interval
To determine if a sync message interval is configured, enter the show running-config command and
look for the cable interface configuration information. If the sync message interval is deactivated or reset
to its default value, the
no sync interval command line appears in the output.
Command Purpose
CMTS01(config-if)# cable sync-interval msec
CMTS01(config-if)# no cable sync-interval
Specify the interval in milliseconds between
successive sync message transmissions from the
Cisco uBR7100 series CMTS. Valid values are
from 1 to 200 msec. Default = 10 msec.
Return the sync message interval to its default
value of 10 msec.