Lenovo Flex System EN2092 Product Manual page 12

The Flex System EN2092 Scalable Switch can be installed in bays 1, 2, 3, and 4 of the Enterprise
chassis. A supported adapter card must be installed in a corresponding slot of the compute node (slot A1
when switches are installed in bays 1 and 2 or slot A2 when switches are in bays 3 and 4).
Prior to Networking OS 7.8, with four-port adapters, an optional Upgrade 1 (90Y3562) was required for the
switch to allow communications on all four ports. With Networking OS 7.8 or later, there is no need to buy
additional switch upgrades for 4-port adapters if the total number of port licenses on the switch does not
exceed the number of external (upstream network ports) and internal (compute node network ports)
connections used; clients have the choice of purchasing Upgrade 1 or 10Gb Uplinks upgrade for
additional ports.
In compute nodes that have an integrated dual-port 10 GbE network interface controller (NIC), NIC's ports
are routed to bays 1 and 2 with a specialized periscope connector, and the adapter card in slot A1 is not
required. However, when needed, the periscope connector can be replaced with the adapter card. In such
a case integrated NIC will be disabled.
Note: 10 GbE LOM and adapters supported by the EN4092 operate at 1 GbE speeds.
The following table shows the connections between adapters installed in the compute nodes to the switch
bays in the chassis.
Table 4. Adapter to I/O bay correspondence
I/O adapter slot
in the compute nodes
Slot 1
Slot 2
Slot 3
(full-wide compute nodes only)
Slot 4
(full-wide compute nodes only)
Flex System EN2092 1Gb Ethernet Scalable Switch
Port on the adapter
Port 1
Port 2
Port 3
Port 4
Port 1
Port 2
Port 3
Port 4
Port 1
Port 2
Port 3
Port 4
Port 1
Port 2
Port 3
Port 4
Corresponding I/O module bay
in the chassis
Module bay 1
Module bay 2
Module bay 1
Module bay 2
Module bay 3
Module bay 4
Module bay 3
Module bay 4
Module bay 1
Module bay 2
Module bay 1
Module bay 2
Module bay 3
Module bay 4
Module bay 3
Module bay 4
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