Administrator Guide

packets performed at the edge of the chassis itself, you can use the FN IOM that contains an FC Flex IO module to connect to a SAN
environment without the need for a separate ToR switch to operate as NPIV proxy gateways. The FN IOM can function in NPIV proxy
gateway mode when an FC Flex IO module is present or in the FIP snooping bridge (FSB) mode when all the ports are Ethernet ports.
The FC Flex IO module uses the same baseboard hardware of the FN IOM and the FX2 chassis. You can insert the FC Flex IO module into
any of the optional module slots of the FN IOM and it provides four FC ports per module. If you insert only one FC Flex IO module, four
ports are supported; if you insert two FC Flex IO modules, eight ports are supported.
By installing an FC Flex IO module, you can enable the FN IOM to directly connect to an existing FC SAN network. The FC Flex IO module
uses the existing slots on the FN IOM and provides four or eight FC ports up to speed of 8 GbE per second. You can connect all of the FC
ports to the same FC SAN fabric to yield FC bandwidth of up to 64GB. It is possible to connect some of the ports to a dierent FC SAN
fabric to provide access to multiple fabric devices.
In a typical Fibre Channel storage network topology, separate network interface cards (NICs) and host bus adapters (HBAs) on each server
(two each for redundancy purposes) are connected to LAN and SAN networks respectively. These deployments typically include a ToR
SAN switch in addition to a ToR LAN switch. By employing converged network adapters (CNAs) that the FC Flex IO module supports,
CNAs are used to transmit FCoE trac from the server instead of separate NIC and HBA devices. In such a scenario, you can determine
whether the FC or SAN packets and the Ethernet or LAN packets must be split within the chassis or by using a ToR switch to perform this
splitting.
If you want to segregate the LAN and SAN trac within the chassis, you can employ switches such as the Dell M8428-k Converged 10GbE
Switch or FC-only switches such as the Dell M5424 switch module. You can also use the S5000 Switch as a ToR switch to separate the
LAN and SAN trac at the ToR. By using the FC Flex IO module, you can optimally and eectively split the LAN and SAN trac at the
edge of the blade chassis itself. You can deploy the FC Flex IO module can be deployed in the enterprise and data center switching
networks to leverage and derive the advantages of a converged Ethernet network.
The FC Flex IO module is not an FCF switch, but it oers FCoE capabilities from the server to the FN IOM, and native FC capability in the
uplink direction to the SAN switches. Although the FC Flex IO module does not support all of the FCF characteristics, such as full-blown
name services or zone parameters, it presents the most exible solution in interoperating with third-party switches that enable the splitting
of LAN and SAN trac. With the FN IOM being well-established systems in the switch domain, you can install the FC Flex IO module to
enhance and increase the converged Ethernet network performance and behavior. With the FC Flex IO module, the FN IOM provide 8
1GbE or 10 GbE server-facing ports and the option to add two FC Flex IO modules that oer up to 8 8Gb Fibre Channel ports for uplink
trac in addition to the xed two 40GbE ports on the FN IOM.
You can congure one of the following upstream (fabric-facing) FC ports:
• Two 40GbE and eight 8GB FC ports
• Four 40GbE and four 8GB FC ports
• Two 40GbE, four 10GbE, and four 8GB FC ports
• Two 40GbE, four 10GBASE-T, and four 8GB FC ports
FC Flex IO Module Capabilities and Operations
The FC Flex IO module has the following characteristics:
• You can install one or two FC Flex IO modules on the FN IOM. Each module supports four FC ports.
• Each port can operate in 2Gbps, 4Gbps, or 8Gbps of Fibre Channel speed.
• All ports on an FC Flex IO module can function in the NPIV mode that enables connectivity to FC switches or directors, and also to
multiple SAN topologies.
• It automatically senses the current speed when the port link is up. Valid link speeds are 2 Gbps, 4 Gbps, and 8 Gbps.
• By default, the FC ports are congured to operate in N-port mode to connect to an F port on an FC switch in a fabric. You can apply
only one FCoE map on an FC port. An N-Port is a port on the node of an FC device and is called a node port.
FC Flex IO Modules
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