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

•If you specified a bootup file name, the Rack PDU attempts to transfer that file from the BOOTP server using TFTP or FTP. The Rack PDU 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 PDU remotely through its “Web Interface” on page 52 or “Command Line Interface” on page 7; the user name and password are both apc, by default. 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 PDU.

This section summarizes the Rack PDU’s communication with a DHCP server. For more detail about how a DHCP server can configure the network settings for a Rack PDU, see “DHCP response options” on page 82.

1.The Rack PDU 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 PDU)

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

–A Host Name (by default, apcXXYYZZ with XXYYZZ being the last six digits of the PDU). 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 PDU needs for network communication. The DHCP offer also includes the Vendor Specific Information option (DHCP option 43). The Rack PDU 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 PDU does not require this cookie by default.)

Option 43 = 01 04 31 41 50 43

Where:

–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 the Require vendor specific cookie to accept DHCP Address check box in the Web interface, you can require the DHCP server to provide an “APC” cookie, which supplies information to the Rack PDU: Administration > Network>TCP/IP>ipv4 settings.

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APC AP89XX, AP8941 manual Option 43 = 01 04 31 41 50
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AP89XX, AP8941 specifications

The APC AP8941 and AP89XX series are advanced power distribution units (PDUs) designed to meet the growing demands of modern data centers and IT environments. These PDUs are well-regarded for their reliability, efficiency, and ease of use, making them integral components for effective power management in critical applications.

One of the standout features of the AP8941 is its capability to provide both local and remote management. Equipped with a web interface, users can monitor power usage, track energy consumption, and gain insights into the performance of connected equipment from virtually anywhere. This remote capability is particularly beneficial for administrators managing multiple sites, as it enables efficient troubleshooting and minimizes downtime.

The AP8941 also supports environmental monitoring by integrating with temperature and humidity sensors. This feature ensures that data centers maintain optimal conditions to protect equipment from overheating or humidity-induced failures, thus enhancing the overall reliability of the power infrastructure.

Another significant aspect of the AP8941 is its ability to distribute power efficiently through its various outlet configurations. The flexible plug-and-play design allows users to customize their power distribution setups for diverse applications, accommodating unique configurations and equipment requirements.

Security is paramount in today’s IT landscape, and the AP89XX series addresses this concern through advanced security features. The units include user authentication and role-based access control, ensuring that only authorized personnel can access critical power management functionalities.

Additionally, the power visualization tools available with the AP8941 enable users to analyze real-time data, identify potential issues, and optimize their power usage. The sleek design and Mounting options make installation straightforward, whether horizontal or vertical, in standard racks or enclosures.

The series supports a variety of power input options and offers robust overload protection, which is essential for preventing damage to both the PDU and connected devices. The combination of management capabilities, security features, and real-time monitoring tools positions the APC AP8941 and AP89XX series as an excellent choice for IT professionals seeking reliable power management solutions in today's data-heavy environments.

In conclusion, the APC AP8941 and AP89XX offer a comprehensive suite of features that cater to the complex needs of data centers. With their focus on efficiency, security, and management capabilities, these PDUs serve as an essential part of modern IT infrastructure, ensuring operational continuity and power reliability.
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