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FC Flex IO Modules
This part provides a generic, broad-level description of the operations, capabilities, and configuration
commands of the Fiber Channel (FC) Flex IO module.

FC Flex IO Modules

This part provides a generic, broad-level description of the operations, capabilities, and configuration
commands of the Fiber Channel (FC) Flex IO module.

Understanding and Working of the FC Flex IO Modules

This chapter provides a generic, broad-level description of the operations and functionality of the Fiber
Channel (FC) Flex IO module, and contains the following sections:
FC Flex IO Modules Overview
FC Flex IO Module Capabilities and Operations
Guidelines for Working with FC Flex IO Modules
Processing of Data Traffic
Installing and Configuring the Switch
Interconnectivity of FC Flex IO Modules with Cisco MDS Switches

FC Flex IO Modules Overview

The Fibre Channel (FC) Flex IO module is supported on MXL 10/40GbE Switch and M I/O Aggregator
(IOA). The MXL or IOA switch installed with the FC Flex IO module functions as a top-of-rack edge switch
that supports converged enhanced Ethernet (CEE) traffic — Fibre Channel over Ethernet (FCoE) for
storage, Interprocess Communication (IPC) for servers, and Ethernet local area network (LAN) (IP cloud)
for data — as well as FC links to one or more storage area network (SAN) fabrics. Although the MXL
10/40GbE Switch and the I/O Aggregator can act as a FIP snooping bridge (FSB) to provide FCoE transit
switch capabilities, the salient and significant advantage of deploying the FC Flex IO module is to enable
more streamlined and cohesive FCoE N-port identifier virtualization (NPIV) proxy gateway functionalities.
The NPIV proxy gateway (NPG) provides FCoE-FC bridging behavior.
The FC Flex IO module offers a rich, comprehensive set of FCoE functionalities on the M1000e chassis by
splitting the Ethernet and Fibre Channel (FC) traffic at the edge of the chassis. The FC switches that are
connected directly to the FC Flex IO module provide Fibre Channel capabilities because the FC Flex IO
module does not support full fabric functionalities. With the separation of Ethernet and FC packets
performed at the edge of the chassis itself, you can use the MXL 10/40GbE Switch or the Aggregator that
contains an FC Flex IO module to connect to a SAN environment without the need for a separate ToR
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