460 IBM Flex System V7000 Storage Node Introduction and Implementation Guide
The I/O module will determine the connectivity type of IBM Flex System V7000 Storage Node
to the compute nodes. The storage node canister must have an appropriate Network Adapter
suitable to the I/O module in order to communicate using the required protocol.
Each of the two node canisters in IBM Flex System V7000 Storage Node can have up to two
Network Adapter cards. These will connect to the I/O modules so that the Storage Node can
communicate with and present storage to the compute nodes.
Figure 11-1 shows the logical connections from the Storage Node canister Network Adapters
to the I/O module switches. Each logical connection shown in the figure represents four serial
links to an I/O module switch. The Network Adapter port uses only one of these four “lanes”
per switch, the unused lanes are provided for future options. Each of these individual I/O links
or lanes can be wired for 1 Gb or 10 Gb Ethernet, 8 Gbps or 16 Gbps Fibre Channel.
Figure 11-1 Logical layout of Storage Node to I/O module switch interconnects
11.2.2 I/O module connection summary
The storage node canister can communicate with all four of the I/O switch modules in the IBM
Flex System Enterprise Chassis by both of the canister Network Adapters. NW 1 on each
canister will be used for Ethernet communications by I/O module switches 1+2 where traffic
can be iSCSI on a TCP/IP network, or FCoE thus providing a network convergence capability.
NW 2 can be used for either an extra Ethernet attachment to I/O module switches 3+4 or can
be used for FC connection to compute nodes and external FC fabrics for external storage
attachment.
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