Chapter 2. Initial configuration 37
Verify that the default IP addresses that are configured on Ethernet port 1 on each of the
node canisters (192.168.70.121 on node 1 and 192.168.70.122 on node 2) do not conflict
with existing IP addresses on the LAN. The default mask that is used with these IP
addresses is 255.255.255.0, and the default gateway address that is used is
192.168.70.1.
You need a minimum of three IPv4 or IPv6 IP addresses for systems that are arranged as
one I/O group and minimum of five if you have two I/O groups. One is for the clustered
system and is used by the administrator for management, and one for each node canister
for service access as needed.
A minimum of one and up to eight IPv4 or IPv6 addresses are needed if iSCSI-attached
hosts access volumes from the IBM Storwize V5000 Gen2.
At least two 0.6-meter (1.96 feet), 1.5-meter (4.9 feet), or 3-meter (9.8 feet) 12 Gb
mini-SAS cables are required for each expansion enclosure. The length of the cables
depends on the physical rack location of the expansion enclosure relative to the control
enclosures or other expansion enclosures.
2.1.1 Procedure to install the SAS cables
We show the procedures to install the SAS cables for the different models.
Storwize V5010 and Storwize V5020
The Storwize V5010 and Storwize V5020 support up to 10 expansion enclosures in a single
chain. To install the cables, complete the following steps:
1. By using the supplied SAS cables, connect the control enclosure to the first expansion
enclosure:
a. Connect SAS port 1 of the left node canister in the control enclosure to SAS port 1 of
the left expansion canister in the first expansion enclosure.
b. Connect SAS port 1 of the right node canister in the control enclosure to SAS port 1 of
the right expansion canister in the first expansion enclosure.
2. To connect a second expansion enclosure, use the supplied SAS cables to connect it to
the previous enclosure in the chain:
a. Connect SAS port 2 of the left canister in the previous expansion enclosure to SAS
port 1 of the left expansion canister in the next expansion enclosure.
b. Connect SAS port 2 of the right canister in the previous expansion enclosure to SAS
port 1 of the right expansion canister in the next expansion enclosure.
3. Repeat the previous steps until all expansion enclosures are connected.
IP addresses: An additional IP address must be used for backup configuration access.
This other IP address allows a second system IP address to be configured on port 2 of
either node canister, which the storage administrator can also use for management of
the IBM Storwize V5000 Gen2 system.
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