Chapter 3. Planning 49
Storwize V7000 Gen2 and Storwize V7000 Gen2+ nodes have a new feature called a 
Technician port. It is an Ethernet marked with a T. All initial configuration for each node is 
performed by using the Technician port. The port runs a Dynamic Host Configuration Protocol 
(DHCP) service so that any notebook or computer connected to the port is automatically 
assigned an IP address.
After the cluster configuration is complete, the Technician port automatically routes the 
connected user directly to the service GUI.
Each Storwize V7000 node requires one Ethernet cable to connect it to an Ethernet switch or 
hub. The cable must be connected to port 1. A 10/100/1000 Mb Ethernet connection is 
supported on the port. Both Internet Protocol Version 4 (IPv4) and Internet Protocol Version 6 
(IPv6) are supported.
Ethernet port 1 on every node must be connected to the same set of subnets. The same rule 
applies to Ethernet port 2 if it is used. However, the subnets available for Ethernet port 1 do 
not have to be the same as configured for interfaces on Ethernet port 2.
Each Storwize V7000 cluster has a Cluster Management IP address, in addition to a Service 
IP address for each node in the cluster (see Example 3-1).
Example 3-1   System addressing example
management IP add. 10.11.12.120
node 1 service IP add. 10.11.12.121
node 2 service IP add. 10.11.12.122
Each node in an Storwize V7000 clustered system must have at least one Ethernet 
connection. Both IPv4 and IPv6 addresses are supported. Storwize V7000 can operate with 
either Internet Protocol or with both internet protocols concurrently.
For configuration and management, you must allocate an IP address to the system, which is 
referred to as the management IP address. For more fault tolerance, you can also configure a 
second IP address for the second Ethernet port on the node. The addresses must be fixed 
addresses. If both IPv4 and IPv6 are operating concurrently, an address is required for each 
protocol.
Support for iSCSI enables one extra IPv4 address, IPv6 address, or both for each Ethernet 
port on every node. These IP addresses are independent of the system’s management and 
service IP addresses.
If you configure management IP on both Ethernet ports, choose one of the IP addresses to 
connect to GUI or CLI. The system cannot automatically fail over the management IP address 
to a different port. If one management IP address is unavailable, use an IP address on the 
alternative network. 
Note: The default IP address for the Technician port is 192.168.0.1. If the Technician port 
is connected to a switch, it is disabled and an error is logged.
Note: For increased availability, an optional second Ethernet connection is supported for 
each Storwize V7000 node. 
Note: The management IP address cannot be the same as any of the defined service IPs.