NEC N8405-019, User Manual

Page: 240 / 384

- 220 -

DHCP Support
Specify whether the feature of distributing IP addresses to the SNMP card of CPU blades,
switch modules and UPSs by DHCP server in the EM card is enabled or disabled. The
default setting is [Enable].
IMPORTANT:

The IP addresses assigned to the switch module through the DHCP
feature are valid for 24 hours at the longest (depending on the
switch module). If you reassign the IP address for the switch module,
the change may not be reflected immediately. In such a case, turn
off then on the AC power to restart the system, or remove then insert
the switch module.
For the CPU blade, the IP addresses are automatically reassigned
when the setting has been changed.
 By the default setting of the UPS, an IP address is assigned to the
UPS through DHCP. The IP addresses assigned to the UPS are valid
for 24 hours at the longest. If you assign a new IP address for the
UPS, the change may not be reflected immediately. To reflect the
change immediately, set the network configuration for UPS to
"manual", then set it to DHCP. The newly specified IP addresses are
assigned to the UPS.

If the IP address assigned to the UPS is expired while the
communication between the EM card and the UPS is being lost, an
IP address will not be re-assigned to the UPS through DHCP when
reconnected with the EM card. In this case, you need to reset the
SNMP card of the UPS.
NOTE:
When the feature of distributing IP addresses by DHCP in the
EM card is disabled, the DHCP base, DHCP gateway and NTP server IP
addresses described later remain in the configuration file. However,
when the DHCP feature is disabled, the system does not refer to these
values. Accordingly, the system operation is not influenced by the
values.

EM Card DHCP Gateway IP Address
Specify the default gateway to be distributed along with the IP address when they are
distributed through DHCP feature of the EM card. If you do not want to distribute the
default gateway, specify "0.0.0.0".
NOTE:
The default gateway must be distributed to UPS. Accordingly,
do not specify "0.0.0.0" when IP address is distributed to UPS.