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Chapter 6
Cable CPE Commands
ip address docsis
To specify that the cable access router should use the DHCP protocol, as required by the DOCSIS
specification, to assign an IP address for its cable interface, use the ip address docsis command in cable
interface configuration mode. To disable the use of DHCP, use the no form of this command.
Cisco uBR905, uBR924, uBR925 cable access routers, Cisco CVA122 Cable Voice Adapter
Syntax Description
There are no key words or arguments for this command.
Defaults
The cable access router uses the DHCP protocol, as required by the DOCSIS specification, to assign an
IP address to its cable interface during system power-on.
Command Modes
Interface configuration (cable interface only)
Command History
Release
12.1(3)XL
12.1(4)T
12.1(3)XL
12.1(5)XU1
12.2(2)XA
Usage Guidelines
The ip address docsis command configures the cable access router so that it obtains its IP address from
a DHCP server at system power-on, which is a requirement for DOCSIS operation. This is the default
mode of operation. If the configuration for the cable interface does not include any form of ip address
command, the cable access router defaults to configuring the cable interface with the ip address docsis
command.
Configuring the cable interface with any other form of the ip address command or with the no ip
address docsis command prevents the cable access router from operating in DOCSIS networks. This
mode of operation should be used only in lab or test networks.
Note
Earlier Cisco IOS software releases for the cable access routers used either the ip address negotiated
or the ip address dhcp command to specify that the cable interface should obtain its IP address from a
DHCP server. These commands should no longer be used to configure the router's cable interface.
OL-1581-07
ip address docsis
no ip address docsis
Modification
This command was introduced for the Cisco uBR905 cable access router.
Support was added for the Cisco uBR924 cable access router.
Support was added for the Cisco uBR905 cable access router.
Support was added for the Cisco CVA122 Cable Voice Adapter.
Support was added for the Cisco uBR925 cable access router.
Cisco Broadband Cable Command Reference Guide
ip address docsis
6-53
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