
Configuring Remote Access
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The Boot Process
An AN, ANH, or ARN boots using its configured startup option. The default
configuration is EZ-Install.
(If an initial boot attempt fails on an AN or ANH, the router attempts to boot once
using a different option. If both boot attempts fail, you must troubleshoot the
problem and reboot the router as described in Appendix A. If an initial boot
attempt fails on an ARN, the router first tries to local boot, and then netboot. The
ARN continues attempts to local boot and netboot until it successfully boots.)
The following sections describe the boot process for network and local boot
options.
Network Boot
When booting over the network using EZ-Install, Netboot, or Directed Netboot,
the router essentially
1. Powers on.
2. Determines its IP address.
3. Obtains a software kernel file and/or configuration file by communicating
with a configured BOOTP server on the IP network.
4. Reboots, using the newly transferred image.
5. Gets application and string files over the network as it needs them.
6. Begins bridging and routing network traffic in accordance with the
configuration file.
The following sections describe in more detail the key steps in this process:
obtaining an IP address and downloading the image and configuration files.
Getting an IP Address
For Netboot and Directed Netboot, you configure the IP address manually.
Chapter 4 describes how to use Site Manager to configure Netboot interfaces.
Chapter 5 describes how to configure the netboot interfaces using the Technician
Interface.
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