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Chapter 2
Cisco CMTS Configuration Commands
cable registration-timeout
To set the value of the DOCSIS registration timeout timer (T9 timer) on a particular interface, use the
cable registration-timeout command in cable interface configuration mode. To reset the timeout value
to the default, use the no form of this command.
Syntax Description
minutes
Defaults
3 minutes
Command Modes
Interface configuration (cable interface only)
Command History
Release
12.0(7)XR2
Usage Guidelines
The DOCSIS 1.1 specification states that the CMTS should enforce the T9 timer, which is a registration
timeout timer that specifies the maximum time allowed between the CMTS sending a successful Ranging
Response (RNG-RSP) message and the CM replying with a Registration Request (REG-REQ) message.
If this timer expires, the CMTS must remove the CM from its list of active CMs, and the CM must restart
the registration process.
The cable registration-timeout command can be used to customize the value of the T9 timer for each
cable interface, to accommodate the CMs using that interface.
Examples
The following example shows the registration timeout value being increased from 3 minutes to
10 minutes:
router# configure terminal
router#(config)# interface c6/0
router(config-if)# cable registration-timeout 10
router(config-if)# exit
router(config)#
OL-1581-08
cable registration-timeout minutes
no cable registration-timeout
Sets the value of the DOCSIS CM registration timeout timer
(T9 timer). Valid range is from 2 to 60 minutes. The default is 3
minutes.
Modification
This command was introduced.
Cisco Broadband Cable Command Reference Guide
cable registration-timeout
2-203
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