- IBM switch Users and Maintenance Guide

Important:
1. The serial interface ports are intended to be used by service technicians to
perform diagnostic operations on the storage server. Incorrect use of the serial
port can result in loss of data access and, in some cases, in loss of data.
2. Do not connect the DS4100 in a public LAN or public subnet. Use a local
private network for the DS4100 storage server and the management station
Ethernet ports.
3. To ensure proper EMI shielding, always use quality shielded serial cables.
Connecting secondary interface cables to a DS4100 base storage
server
Connect a pair of Ethernet cables from the storage-management station to the
Ethernet ports for Controller A (located on the left) and Controller B (located on the
right) on the back of the storage server. Figure 52 shows the location of the ports.
Connecting secondary interface cables to a DS4100 single-controller
storage server
Connect an Ethernet cable from the storage-management station to the Ethernet
port of the controller.
Connecting expansion units (base storage server only)
Attention: The minimum DS4000 EXP100 ESM firmware level (9554 or later) is
required before attaching a DS4000 EXP100 to the DS4100 base storage server.
Refer to the section “Replacing a failed hot-swap ESM” in the IBM TotalStorage
DS4000 EXP100 Storage Expansion Unit Installation, User’s, and Maintenance
Guide for details on how to identify ESM firmware levels.
You cannot connect expansion units to the DS4100 single-controller storage server.
If you are using the DS4100 single-controller storage server, skip this section.
Please contact your IBM support representative for information about the availability
of such support in the future.
Controller A
Ethernet port
Controller A
Serial port
Controller B
Serial port
Controller B
Ethernet port
f10ug030
Figure 52. Ethernet and serial port locations
Chapter 3. Cabling the storage server 57