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11Rack ATS AP44xx Installation and Quick Start

DHCP and BOOTP configuration

In the web interface, the TCP/IP options are defined under the Configuration tab, in the Network menu.

The possible settings are Manual, BOOTP, and DHCP (the default setting). The default TCP/IP

configuration setting, DHCP, assumes that a properly configured DHCP server is available to provide

TCP/IP settings to the Rack ATS. You can also configure the setting for BOOTP. A user configuration

(INI) file can function as a BOOTP or DHCP boot file.

NOTE: If no servers are available, see “Device IP Configuration Wizard” on page 10, “Local access to

the command line interface (CLI)” on page 12, or “Remote access to the CLI” on page 12 to configure

the TCP/IP settings.

BOOTP: For the Rack ATS to use a BOOTP server to configure its TCP/IP settings, it must find a

properly configured RFC951-compliant BOOTP server.

1. In the BOOTPTAB file of the BOOTP server, enter the Rack ATS’s MAC address, IP address,

subnet mask, and default gateway, and, optionally, a bootup file name. Look for the MAC address

on the bottom of the Rack ATS.

2. When the Rack ATS reboots, the BOOTP server provides it with the TCP/IP settings.

– If you specified a bootup file name, the Rack ATS attempts to transfer that file from the

BOOTP server using TFTP or FTP. The Rack ATS assumes all settings specified in the bootup

file.

– If you did not specify a bootup file name, you can configure the other settings of the Rack ATS

remotely through its web interface (see “Web Interface” on page 14) or CLI (see “Remote

access to the CLI” on page 12) The default user name and password are apc for both

interfaces. To create a bootup file, see your BOOTP server documentation.

DHCP: You can use an RFC2131/RFC2132-compliant DHCP server to configure the TCP/IP settings for

the Rack ATS.

1. The Rack ATS sends out a DHCP request that uses the following to identify itself:

– A Vendor Class Identifier (APC by default)

– A Client Identifier (by default, the MAC address of the Rack ATS)

– A User Class Identifier (by default, the identification of the application firmware installed on the

Rack ATS)

– A Host Name (by default, apcXXYYZZ with XXYYZZ being the last six digits of the ATS serial

number). This is known as DHCP Option 12.

2. A properly configured DHCP server responds with a DHCP offer that includes all the settings that

the Rack ATS needs for network communication. The DHCP offer also includes the Vendor

Specific Information option (DHCP option 43). The Rack ATS can be configured to ignore DHCP

offers that do not encapsulate the APC cookie in DHCP option 43 using the following

hexadecimal format. (The Rack ATS does not require this cookie by default.)

Option 43 = 01 04 31 41 50 43

– The first byte (01) is the code.

– The second byte (04) is the length.

– The remaining bytes (31 41 50 43) are the APC cookie.

See your DHCP server documentation to add code to the Vendor Specific Information option.

NOTE: By selecting Require vendor specific cookie to accept DHCP Address in the web

interface, you can require the DHCP server to provide an “APC” cookie, which supplies

information to the Rack ATS.

This section summarizes the Rack ATS’s communication with a DHCP server. For more detail about how

a DHCP server can configure the network settings for a Rack ATS, see the User Manual on