Datasheet

IBM Flex System Enterprise Chassis 9
A four-port adapter doubles the connections between each adapter and switch pair (for example, a
four-port adapter in A1 in each compute node routes two connections to switch 1 and two connections to
switch 2).
The following figure shows how four-port adapters are connected to switches that are installed in the
chassis.
Figure 7. Logical layout of the inter-connections between four-port I/O adapters and I/O modules
To make use of all four ports of a four-port card, you must install two switches in the chassis, and each
switch must have 28 internal ports enabled. The IBM Flex System Fabric EN4093 10Gb Scalable Switch
with license upgrade 1 enables 28 internal ports, for example. Similarly, when 6-port cards become
available, two switches must be installed, and 42 internal ports must be enabled. The IBM Flex System
Fabric EN4093 10Gb Scalable Switch with license upgrade 2 enables a total of 42 internal ports, for
example.