Figure 95 Lan Control (Switching Of The Master Cm); Figure 96 Lan Control (When The Ip Address Of The Slave Cm Is Set) - Fujitsu ETERNUS AF250 Design Manual

2. Connection Configuration
LAN Connection
IP addresses of the LAN ports are not assigned to each CM. These IP addresses are assigned to the role of master
or slave. If the Master CM is switched, the same IP addresses are reused. Therefore, even if the Master CM is
switched and the physical port is changed, access can be maintained via the same IP addresses. The MAC ad-
dress is not inherited.

Figure 95 LAN Control (Switching of the Master CM)

IP address A
CM#0
has failed
ETERNUS AF
ETERNUS AF
Each CM has an LED that lights up green to identify when it is the Master CM.
•
Setting the IP address of the Slave CM ensures that ETERNUS Web GUI or ETERNUS CLI can be used from the
•
Slave CM if an error occurs on the LAN path for the Master CM.
The Master CM and the Slave CM perform different functions. The Slave CM can only switch the Master CM
and display the status of the ETERNUS AF.
The IP address of the Slave CM does not need to be set for normal operation.

Figure 96 LAN Control (When the IP Address of the Slave CM Is Set)

LAN path
error
IP address A
ETERNUS AF
Master CM Slave CM
CM#0
Controller enclosure
The Master CM is switched.
Slave CM Master CM
IP address A
CM#0
Controller enclosure
When the Master CM is
switched, the IP addresses of
the previous Master CM are
taken over by the new
Master CM.
Master CM Slave CM
IP address B
CM#0
Controller enclosure
The IP address of the Slave CM is
used to switch the Master CM and
display the status of the ETERNUS AF.
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays Design Guide (Basic)
Copyright 2019 FUJITSU LIMITED
CM#1
CM#1
CM#1
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P3AG-1822-09ENZ0