APC AP7900 Manuel D’Utilisation

When 

 is set to its default 

 setting, the 

following occurs when the Switched Rack PDU is started or reset:

1. The Rack PDU makes up to five requests for its network assignment from 

any BOOTP server. If a valid BOOTP response is received, the Rack PDU 
starts the network services and sets 

 to 

.

2. If the Rack PDU fails to receive a valid BOOTP response after five 

BOOTP requests, the Rack PDU makes up to five requests for its 
network assignment from any DHCP server. If a valid DHCP response 
is received, the Rack PDU starts the network services and sets 

 to 

.

3. If the Switched Rack PDU fails to receive a valid DHCP response after 

five DHCP requests, it repeats BOOTP and DHCP requests until it 
receives a valid network assignment. First it sends a BOOTP request 
every 32 seconds for 12 minutes, then one DHCP request with a time-
out of 64 seconds, and so forth.

To configure the Switched Rack PDU so that it always uses 
the 

setting for 

, enable the 

 option, which is disabled by default.

See 

If a DHCP server responds with an invalid offer (e.g., without the 
APC Cookie), the Switched Rack PDU accepts the lease from 
that server on the last request of the sequence and 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