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Connecting secondary interface cables
This section is applicable to (direct) out-of-band management configurations only. If
your configuration uses host-agent (in-band) management, skip this section.
Use the Ethernet interface ports on the back of the storage subsystem to connect
the controllers for direct management of the storage subsystems (see “Direct
(out-of-band) management method” on page 102).
Important:
1. The serial interface ports are intended to be used by service technicians to
perform diagnostic operations on the storage subsystem. Incorrect use of the
serial port can result in loss of data access and, in some cases, in loss of data.
Do not make connections to the serial port unless you do so under the direct
supervision and guidance of IBM support personnel. The serial port connection
requires a special PS2 DIN to DB9 male converter. (IBM Service and support
personnel, see Serial cable adapter (RoHS) in “Parts listing” on page 188 for
FRU P/N.)
2. To minimize security risks, do not connect the DS4700 Express in a public LAN
or public subnet. Use a local private network for the DS4700 Express and the
management station Ethernet ports.
3. To ensure proper EMI shielding, always use quality braided and shielded serial
cables.
Connect a pair of Ethernet cables from the storage-management station to the
Ethernet ports for controller A (located on the top) and controller B (located on the
bottom) on the back of the storage subsystem. Figure 79 shows the location of the
ports on the DS4700 Express Storage Subsystem model 70, and Figure 80 on page
101 shows the location of the ports on the DS4700 Express Storage Subsystem
model 72. Only one Ethernet port connection from each controller is required to
establish a direct (out-of-band) management connection to the DS4700 Express
Storage Subsystem.
Note: The alignment of the Ethernet and serial ports on controller A are opposite
those of controller B. Before inserting an Ethernet or serial cable, verify that
the cable connection is rotated correctly to match the alignment of the port
on the RAID controller. Do not force-fit.
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Figure 79. Ethernet and serial port locations on DS4700 Express model 70
100 IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide