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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
OL-2239-03
Chapter2 Configuring the Cable Modem Termination System for the First Time
Configuring the Cisco uBR7200 Series Using AutoInstall
Using an HDLC-Encapsulated Serial Interface Connection
To set up AutoInstall via a serial line with HDLC encapsulation (the default), you must configure the
existing router. Use the following commands, beginning in global configuration mode:
In the following example, the existing router's configuration file contains the commands needed to
configure the router for AutoInstall on a serial line using HDLC encapsulation:
Router# more system:startup-config
. . .
interface serial 0
ip address 172.31.10.1 255.255.255.0
ip helper-address 172.31.20.5
. . .
Using an Ethernet, Token Ring, or FDDI Interface Connection
To set up AutoInstall using an Ethernet, Token Ring, or FDDI interface, you must modify the configuration
of the existing router. Use the following commands, beginning in global configuration mode:
Command Purpose
Step1
interface serial
interface-number
Configures the serial interface that connects to the new router with
HDLC encapsulation (the default), and enters interface configuration
mode for the specified interface number.
Step2
ip address address mask Enters an IP address for the interface. The host portion of the address
must have a value of 1 or 2. (AutoInstall over Frame Relay does not have
this address constraint.)
Step3
ip helper-address address Configures a helper address for the serial interface to forward broadcasts
associated with the TFTP, BOOTP, and DNS requests.
Step4
clock rate bps (Optional) Configures a DCE clock rate for the serial line, unless an
external clock is being used. This step is needed only for DCE appliques.
Step5
Ctrl-Z Exits configuration mode.
Step6
copy running-config
startup-config
Saves the configuration file to your startup configuration. On most
platforms, this step saves the configuration to NVRAM. On the
Cisco7000 family, this step saves the configuration to the location
specified by the CONFIG_FILE environment variable.
Command Purpose
Step1
interface {ethernet | tokenring |
fddi} interface-number
Enters interface configuration mode for the specified LAN
interface.
Step2
ip address address mask Specifies an IP address for the interface.
Step3
ip helper-address address (Optional) Configures a helper address to forward broadcasts
associated with the TFTP, BOOTP, and DNS requests.
Step4
Ctrl-Z Exits configuration mode.
Step5
copy running-config startup-config Saves the configuration file to your startup configuration. On most
platforms, this step saves the configuration to NVRAM. On the
Cisco7000 family, this step saves the configuration to the location
specified by the CONFIG_FILE environment variable.