InRow RC/RD/RP (600 mm) User’s Guide38
DHCP At 32-second intervals, the cooling unit requests network assignment from any DHCP
server. By default, the number of retries is unlimited.
•If the cooling unit receives a valid response, by default it requires the APC cookie from
the DHCP server in order to accept the lease and start the network services.
•If the cooling unit finds a DHCP server, but the request to that server fails or times out,
the cooling unit stops requesting network settings until it is restarted.
•If a DHCP server responds with an invalid offer (for example, the offer does not
contain the APC Cookie), the cooling unit accepts the lease from that server on the last
request of the sequence and then immediately releases that lease. This prevents the
DHCP server from reserving the IP address associated with its invalid offer.
For more information on what a valid response requires, see “DHCP response
options” on page 39.
To specify values other than the defaults, click Next>> to access the DHCP
Configuration page:1
•Require vendor specific cookie to accept DHCP Address: To disable the
requirement that the DHCP server provide the APC cookie, clearclear this check-box.
•Maximum retries: Enter the number of retries that will occur when no valid response
is received, or zero (0) for an unlimited number of retries.
DHCP and
BOOTP
The default setting. The cooling unit 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 from the default to
BOOTP or DHCP, depending on the type of server that supplied the TCP/IP settings to
the cooling unit.
Click Next>> to access and configure the same settings that are available on the
BOOTP Configuration and DHCP Configuration pages1 and to specify that the
DHCP and BOOTP setting be retained after either type of server provides the TCP/IP
values.
TCP/IP
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 cooling unit, which uniquely identifies it on the local
area network (LAN)
• User Class: The name of the application firmware module