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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
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Chapter 2 Configuring the Cable Modem Termination System for the First Time
Configuring the Cisco uBR7200 Series Using AutoInstall
Step 6 If the existing router is to help install the new router automatically using a Frame Relay-encapsulated
serial interface, that interface must be configured with the following:
• An IP helper address pointing to the TFTP server. In the following example, 171.69.2.75 is the
address of the TFTP server:
ip helper 171.69.2.75
• A Frame Relay map pointing back to the new router. In the following example, 172.21.177.100 is
the IP address of the new router's serial interface, and 100 is the PVC identifier:
frame-relay map ip 172.21.177.100 100 dlci
Step 7 If the existing router is to help install the new router automatically via an Ethernet, Token Ring, or FDDI
interface using BOOTP or Reverse Address Resolution Protocol (RARP), then a BOOTP or RARP server
also must be set up to map the new router's Media Access Control (MAC) address to its IP address.
Step 8 IP helper addresses might need to be configured to forward the TFTP and DNS broadcast requests from
the new router to the host that is providing those services.
Performing the AutoInstall Procedure
This procedure provides the steps to configure your Cisco uBR7200 series router using AutoInstall.
Note For a detailed description of the processes involved with AutoInstall, refer to the chapter titled “Using
Configuration Tools” in the Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.1
on Cisco.com.
To dynamically configure a new router using AutoInstall, complete the following steps. Steps 1, 2, and 3
are completed by the central administrator. Step 4 is completed by the person at the remote site.
Step 1 Modify the existing router's configuration to support the AutoInstall procedure.
Step 2 Set up the TFTP server to support the AutoInstall procedure.
Step 3 Set up the BOOTP or RARP server if needed. A BOOTP or RARP server is required for AutoInstall
using an Ethernet, Token Ring, FDDI, or Frame Relay-encapsulated serial interface. With a Frame
Relay-encapsulated serial interface, the existing router acts as the BOOTP server. A BOOTP or RARP
server is not required for AutoInstall using an HDLC-encapsulated serial interface.
Step 4 Connect the new router to the network.
Configuring an Interface to Allow Use of AutoInstall
You can use AutoInstall through any of the following types of interfaces:
• Using an HDLC-Encapsulated Serial Interface Connection (the default configuration for a serial line)
• Using an Ethernet, Token Ring, or FDDI Interface Connection
• Using a Frame Relay-Encapsulated Serial Interface Connection
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