Understanding Tools and Options
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•Minimize the need to maintain the router’s local file system
When the an AN/ANH or ARN router obtains files from a BootP server, it
stores them in memory, not in its file system, reducing the need for frequent
file-system compactions. (See Using Technician Interface Software or
Configuring and Managing Routers Using Site Manager to learn about
compacting a file system.)
•Restore a corrupted file system
The router’s file system resides on an installed flash memory card. With
Netboot enabled, the AN/ANH or ARN router can still boot over the network
if the local files become corrupted. (When the router reboots due to a reset or
power loss, it automatically boots the configuration and image files over the
network if it cannot find intact files locally.)
•Obtain application and string files from the BootP server as the router needs
them
Obtaining these files individually, rather than obtaining the en tire an.exe or
arn.exe file, reduces line costs and the use of flash memory space.
The Netboot procedure requires the following at initial startup:
•A communications link between the AN/ANH or ARN router and an
upstream router over an Ethernet, HDLC, frame relay, or token ring (ARN
only) interface
•A local console or modem connection with the AN/ANH or ARN router
•A BootP server that contains the operating-system kernel (krnl_arn.exe for the
ARN or krnl_an.exe for the AN/ANH) or a network configuration file
customized for the AN/ANH or ARN router
•An IP address assigned to the AN/ANH or ARN router boot interface
Directed Netboot
The Directed Netboot procedure requires the following at initial startup:
•A communications link between the AN/ANH or ARN router and an
upstream router over an Ethernet, HDLC, frame relay, or token ring (ARN
only) interface
•A local console or modem connection with the AN/ANH or ARN router