Specifications

Rack Access PX-HID Installation 15
DHCP. You can use a RFC2131/
RFC2132-compliant DHCP server to configure the
TCP/IP settings for the Rack Access PX-HID.
1. The Rack Access PX-HID 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 Rack
Access PX-HID’s MAC address value)
A User Class Identifier (by default, the
identification of the Rack Access PX-HID’s
application firmware)
2. A properly configured DHCP server responds
with a DHCP offer that includes all of the
settings that the Rack Access PX-HID needs
for network communication. The DHCP offer
also includes the Vendor Specific Information
option (DHCP option 43). By default, the
Rack Access PX-HID will ignore DHCP offers
that do not encapsulate the APC cookie in the
Vendor Specific Information option using the
following hexidecimal 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 cookies
This section briefly summarizes the
Rack Access PX-HID
communication with a DHCP server.
For more detail about how a DHCP
server is used to configure the
network settings for the Rack
Access PX-HID, see “DHCP
Configuration” in the Rack Access
PX-HID User’s Guide.
See your DHCP server
documentation to add code to the
Vendor Specific Information option.
To disable the APC cookie
requirement for future DHCP offers,
disable the setting Require vendor
specific cookie to accept DHCP
address.This setting is available in
the Web interface when you choose
the Administration tab, the
Network option on the top menu
bar, TCP/IP on the left navigation
menu, and either BOOTP & DHCP
or DHCP under TCP/IP.