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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 subsystem (see “Direct
(out-of-band) management method” on page 113).
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.
2. To minimize security risks, do not connect the DS5100 and DS5300 in a public
LAN or public subnet. Use a local private network for the DS5100 and DS5300
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 74 on page 112 shows the
location of the ports. Only one Ethernet port connection from each controller is
required to establish a direct (out-of-band) management connection to the DS5100
and DS5300.
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
6
Figure 73. Cabling diagram for redundant iSCSI host connections
Chapter 3. Cabling the storage subsystem
111