APC ACRA100 Installation Manual download pdf (Page 54)

Pumped Refrigerant System Operation and Maintenance46

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

the RDU.

This section summarizes the RDU’s communication with a DHCP server. For more detail

about how a DHCP server can configure the network settings for a RDU, see “DHCP

Configuration” in the RDU User’s Guide on the Utility CD.

1. The RDU 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 RDU)

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

the RDU)

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

that the RDU needs for network communication. The DHCP offer also includes the Vendor

Specific Information option (DHCP option 43). By default, the RDU ignores DHCP offers that

do not encapsulate the APC cookie in DHCP option 43 using the following hexadecimal format:

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: To disable the requirement that a DHCP offer include the APC cookie, clear the check

box Require vendor specific cookie to accept DHCP Address in the Web interface:

Administration > Network>TCP/IP>DHCP. Alternately, at the command line interface, use

this command to disable the DHCP cookie requirement: boot -c disable

Local access to the command line interface. You can use a computer connected to the serial port

on the front of the RDU to access the command line interface.

1. Select a serial port at the local computer, and disable any service that uses that port.

2. Use the provided serial cable (APC part number 940-0299) to connect the selected port to the

serial port on the front panel of the InRow RD.

3. Run a terminal program (such as HyperTerminal) and configure the selected port for 9600 bps, 8

data bits, no parity, 1 stop bit, and no flow control. Save the changes.

4. Press

ENTER, repeatedly if necessary, to display the User Name prompt.

5. Use apc for the user name and password.

See “Command line interface” on page 1 to finish the configuration.

Remote access to the command line interface

From any computer on the same network as the RDU, you can use ARP and Ping to assign an IP address

to the RDU, and then use Telnet to access its command line interface and configure the other TCP/IP

settings.

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APC ACRA100 Installation Manual Page 54

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