User`s guide

®
USER’S GUIDE
Metered Rack PDU
45
DHCP response options
Each valid DHCP response contains options that provide the TCP/IP settings that the
Rack PDU needs to operate on a network, and other information that affects the Rack
PDU’s operation.
Vendor Specific Information (option 43). The Rack PDU uses this option in a DHCP
response to determine whether the DHCP response is valid. This option contains up to
two APC-specific options in a TAG/LEN/DATA format: the APC Cookie and the Boot
Mode Transition.
• APC Cookie. Tag 1, Len 4, Data “1APC”
Option 43 communicates to the Rack PDU that a DHCP server is configured to
service APC devices. By default, this DHCP response option must contain the APC
cookie for the Rack PDU to accept the lease.
DHCP
&
BOOTP
The default setting. The Rack PDU tries to obtain its TCP/IP settings from a BOOTP
server first, and then, if it cannot discover a BOOTP server, from a DHCP server. If it
obtains its TCP/IP settings from either server, it switches this setting to BOOTP or
DHCP, depending on the type of server that supplied the TCP/IP settings to the Rack
PDU.
Click Next>> to configure the same settings that are on the BOOTP Configuration
and DHCP Configuration pages
1
and to specify that the DHCP and BOOTP setting
be retained after either type of server provides the TCP/IP values.
Setting Description
1. The default values for these three settings on the configuration pages generally do not need to be
changed:
•Vendor Class: APC
•Client ID: The MAC address of the Rack PDU, which uniquely identifies it on the local area
network (LAN)
•User Class: The name of the application firmware module
To disable the requirement of an APC cookie, see DHCP.