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– When an odd number of expansions is attached to a control enclosure, ensure the SAS expansion
chain that is attached to SAS port 1 of the node canisters contains one more expansion enclosure
than the SAS expansion chain attached to SAS port 2 of the canister.
• No cable can be connected between a port on a left canister and a port on a right canister.
• A cable must not be connected between ports in the same enclosure.
• A connected port on the node canister must connect to a single port on an expansion canister. Cables
that split the connector out into separate physical connections are not supported.
• Attach cables serially between enclosures; do not skip an enclosure.
• The last enclosure in a chain must not have cables in port 2 of canister 1 and port 2 of canister 2.
• Ensure that cables are installed in an orderly way to reduce the risk of cable damage when replaceable
units are removed or inserted.
See "Connecting 2U expansion enclosures to the control enclosure" on page 62 for examples of SAS
cable connections on each system.
For information about the SAS cabling requirements for 5U expansion enclosures, see "Connecting the 5U
expansion enclosures" on page 53.
Connecting Ethernet cables to the node canisters
The control enclosures have several Ethernet ports on the rear of each node canister. The ports provide
access to system management facilities and can also provide iSCSI connectivity. The number of ports and
their initial function differ across each system model.
Procedure
To install the Ethernet cables, complete the following steps.
1. If you have a FlashSystem 5010 system, complete the following steps.
a) Identify the location and function of the Ethernet ports on your system, as shown in Figure 63 on
page 65 .
• Port 1 can be used to provide Ethernet connections; in the figure, port 1 is identified by the green
cable (
1
).
• Port 2 serves as the technician port when the system is initially set up or when service is needed.
In the figure, port 2 is identified by the blue cable (
technician port on port 2 is disabled. Port 2 can then be connected to the Ethernet switch for
iSCSI connectivity, IP replication, or to act as a second management port.
Note: Do not connect port 2 to an Ethernet switch until the system initialization or service is
complete. After the system initializes, the technician port is automatically disabled and port 2 can
then be connected to the Ethernet switch. To use the technician port again, port 2 must be
disconnected from the Ethernet switch and the technician port enabled using the satask
chserviceip -techport enable CLI command. After use, the technician port must be
disabled again using the satask chserviceip -techport disable command before port 2
is reconnected to the Ethernet switch.
b) Connect Ethernet port 1 of each node canister in the system to the IP network that will provide a
connection to the system management interfaces.
Figure 63 on page 65 shows the Ethernet cabling and the ports on the back of a FlashSystem
5010 system.
64 IBM FlashSystem 5000 : FlashSystem 5000 Quick Installation Guide
2/T
). After the system initializes, the
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