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Chapter 2
Cisco CMTS Configuration Commands
cable dci-response
To configure how a cable interface responds to DCI-REQ messages for CMs on that interface, use the
cable dci-response command in cable interface configuration mode.
Syntax Description
success
ignore
reject permanent
reject temporary
Defaults
The Cisco CMTS responds to DCI-REQ messages from all CMs by sending a DCI-RSP response with
the confirmation code of Success (0).
Command Modes
Interface configuration (cable interface only)
Command History
Release
12.1(4)CX
12.2(4)BC1
Usage Guidelines
The Device Class Identification (DCI) messages are part of the Media Access Control Specification
section of the DOCSIS 1.1 specification (revision SP-RFIv1.1-I05-000714 and above). A CM can
optionally use the DCI-REQ message to inform the CMTS of certain capabilities, such as whether it is
a CPE-controlled cable modem (CCCM).
The CMTS then responds with one of the following confirmation codes:
•
•
OL-1581-08
cable dci-response [success | ignore | reject permanent | reject temporary]
Description
This command was introduced for DOCSIS 1.1 operation.
Support for this command was added to the Release 12.2 BC train.
Success—Allows the CM to continue with the registration process.
Reject Permanent—Instructs the CM to abort its registration process on this downstream channel.
The CM must try all other available downstream channels before attempting to register on this
downstream channel again.
Configures the interface so that the Cisco CMTS responds to DCI-
REQ messages from CMs on the interface by sending a DCI-RSP
response with the confirmation code of Success (0).
Configures the interface so that the Cisco CMTS ignores DCI-REQ
messages from CMs on the interface. It does not send any DCI-RSP
responses.
Configures the interface so that the Cisco CMTS responds to DCI-
REQ messages from CMs on the interface by sending a DCI-RSP
response with the confirmation code of Reject Permanent (4).
Configures the interface so that the Cisco CMTS ignores the first four
DCI-REQ messages from a CM on the interface, but on the fifth DCI-
REQ message, the CMTS responds with a DCI-RSP response with
the confirmation code of Reject Temporary (3). The CMTS then
continues to ignore the next seven DCI-REQ messages and then
restarts this process when it receives the twelfth DCI-REQ message.
Cisco Broadband Cable Command Reference Guide
cable dci-response
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