user manual

Configuring Headend Broadband Access Router Features
Setting Service Options
MC-578
Cisco IOS Multiservice Applications Configuration Guide
Troubleshooting Tips
To troubleshoot the configuration, perform the following tasks:
• Make sure you entered the correct port and cable modem card slot number when you activated
DHCP giaddr.
• A DOCSIS-based DHCP server is required. The DHCP server verifies that the “fixed” IP address,
if any, returned to the host is valid for the IP subnet on that downstream interface. The IP address
must be unique and valid in the subnet for the end user to obtain connectivity.
Setting Service Options
The following sections describe configurable service options for the Cisco uBR7200 series.
Configuring ToD Service
To activate ToD service for the Cisco uBR7200 series, use the following command in global
configuration mode:
To disable ToD service (the default) after it has been enabled, enter the no cable time-server command
or the cable time-server disable command in global configuration mode.
Verifying ToD Service
To verify whether or not ToD service has been activated, enter the show running-config command and
look for the global cable configuration information. If ToD service has been activated, an entry will
appear in this output. If ToD service has been deactivated, no entry will appear in this output.
Troubleshooting Tips
To troubleshoot the configuration, make sure you are in global configuration mode.
Setting Optional IP Parameters
Additional IP parameters can be set to enable downstream echoing of upstream data. To configure these
optional IP parameters, perform the tasks in the following sections:
• Activating IP Multicast Echo
• Activating IP Broadcast Echo
Note The default values for the commands used in these configuration steps are adequate in most
cases to configure the Cisco uBR7200 series.
Command Purpose
CMTS01(config)# cable time-server enable
Enables ToD service for the Cisco uBR7200 series.