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Cisco 7201 Installation and Configuration Guide
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Chapter 3 Starting and Configuring the Router
Configuring a Cisco 7201 Router
Performing a Basic Configuration Using AutoInstall The AutoInstall process is designed to configure the Cisco 7201 router automatically after connection
to your WAN. For AutoInstall to work properly, a TCP/IP host on your network must be preconfigured
to provide the required configuration files. The TCP/IP host may exist anywhere on the network as long
as the following two conditions are maintained:
1. The host must be on the remote side of the router synchronous serial connection to the WAN.
2. User Datagram Protocol (UDP) broadcasts to and from the router and the TCP/IP host are enabled.
This functionality is coordinated by your system administrator at the site where the TCP/IP host is
located. You should not use AutoInstall unless the required files are av ailable on the TCP/IP host. Refer
to the Cisco IOS Configuration Fundamentals Configuration Guide and Cisco IOS Configuration
Fundamentals Command Reference publications for information about how AutoInstall works.
Complete the following steps to prepare your Cisco 7201 router for the AutoInstall process:
Step 1 Attach the appropriate synchronous serial cable to synchronous serial interface 0 on the router.
Step 2 Turn the power switch on the power supply to the on (O) position. (This action turns on AC power to the
router.)
The router loads the operating system image from flash memory. If the remote end of the WAN
connection is connected and properly configured, the AutoInstall process begins.
Step 3 Once the AutoInstall process is completed, use the copy running-config startup-config command to
write the configuration data to the router’s nonvolatile random-access memory (NVRAM). Perform the
following step to complete this task.
Step 4 At the # prompt, enter the following command:
Hostname# copy running-config startup-config
Note Completing Step 3 saves the configuration settings that the AutoInstall process created to NVRAM. If
you fail to do this, your configuration will be lost the next time you reload the router.
Performing a Basic Configuration Using the Setup Facility If you do not plan to use AutoInstall, do not connect the router’s serial (WAN) cable to the channel
service unit/data service unit (CSU/DSU). If the WAN cable is not connected, the router boots from flash
memory and goes automatically into the setup facility.
Note You can run the setup facility any time you are at the enable prompt (#) by entering the setup command.
If the serial (WAN) cable is connected to the CSU/DSU and the router does not have a configuration
stored in NVRAM, the router attempts to run AutoInstall at startup. The router may take several minutes
to determine that AutoInstall is not set up to a remote TCP/IP host. Once the router determines that
AutoInstall is not configured, it defaults to the setup facility.