Ignite-UX Administration Guide for HP-UX 11i (B3921-90079, October 2013)

4 Simple Network: Creating a Server for Anonymous Clients
This chapter describes how to configure your server to network boot and install HP-UX on anonymous
clients.
Overview of Anonymous Clients
When booting registered PA-RISC clients, the clients’ IP addresses and MAC addresses were
entered in the /etc/opt/ignite/instl_boottab file. If the clients were Itanium®-based,
they were registered in the /etc/bootptab file.
An anonymous client can be booted from an Ignite-UX server without an IP address previously
mapped to its MAC address. Anonymous clients boot using an IP address provided by the server.
Using anonymous client booting on a network is useful when you have many different systems that
must be booted, installed, or recovered. It relieves you from the task of configuring for each specific
system and eliminates the errors inherent in typing IP addresses and MAC addresses. Such an
error could cause IP addresses to be accidentally assigned to more than one computer at a time.
The /etc/opt/ignite/instl_boottab file is used to provide PA-RISC systems with anonymous
client booting. Within the instl_boottab file, if there are IP addresses not assigned to any
MAC address, those IP addresses are available to lease to requesting anonymous clients.
Itanium-based clients use DHCP to boot anonymously.
Configuring an Ignite Server to Boot Anonymous PA-RISC Clients
Using the Server Setup Wizard
If you know you want to use anonymous client boot when you start up your Ignite-UX server, you
can set it up that way using the Server Setup Wizard.
Start Ignite-UX and the Server Setup Wizard as described in “Configuring the Ignite-UX Server for
PA-RISC Clients” (page 30) until you get to the Configure Booting IP Addresses dialog box as
shown in Figure 11 (page 33).
Enter individual or a range of valid IP addresses. Instead of entering a MAC address in the reserved
for: 0x box, leave it blank. When the instl_bootd daemon requests an IP address for your
anonymous PA-RISC client to boot from, it will be given an IP address not registered with any
specific MAC address.
Editing the instl_boottab file
You can enter IP addresses in the instl_boottab file for anonymous PA-RISC client booting.
The instl_boottab file contains comments with instructions on syntax. To add an IP address
for anonymous PA-RISC booting, simply add that IP address to the file on its own line. Since the
IP address is not explicitly marked as reserved or assigned to a MAC address, it is usable by any
client. For more information, see instl_bootd(1M).
NOTE: No intervention is required to have instl_bootd pick up changes to the /etc/opt/
ignite/instl_boottab file. When a boot request is received, instl_bootd always checks
whether the file was modified since last read, and rereads it before answering any boot request.
42 Simple Network: Creating a Server for Anonymous Clients