• priority-group 2 bandwidth 40 pfc on
• priority-pgid 0 0 0 2 1 0 0 0
• On I/O Aggregators, uplink failure detection (UFD) is disabled if FC Flex IO module is present to allow
server ports to communicate with the FC fabric even when the Ethernet upstream ports are not
operationally up.
• Ensure that the NPIV functionality is enabled on the upstream switches that operate as FC switches or
FCoE forwarders (FCF) before you connect the FC port of the MXL or I/O Aggregator to these
upstream switches.
• While storage traffic traverses through FC Flex IO modules and the Ethernet uplink port-channel
status changes (with DCB enabled on an adjacent switch), FCoE traffic is disrupted. This problem does
not occur if Ethernet traffic is not involved and only FCoE traffic is transmitted. Also, if DCB on the
ToR switch is disabled, traffic disruption does not occur.
Port Numbering for FC Flex IO Modules
Even-numbered ports are at the bottom of the I/O panel and for modules odd-numbered ports are at the
top of the I/O panel. When installed in a PowerEdge M1000e Enclosure, the MXL 10/40GbE Switch and
Aggregator ports are numbered 33 to 56 from the bottom to the top of the switch. The following port
numbering convention applies to the FC Flex IO module:
• In expansion slot 0, the ports are numbered 41 to 44.
• In expansion slot 1, the ports are numbered 49 to 52.
Installing the Optics
The following optical ports are supported on the FC Flex IO module using one of the supported breakout
cables:
• 4G or 8G Fibre Channel small form-factor pluggable plus (SFP+) optics module and LC connectors
over a distance of 150 meters.
• 4G or 8G Fibre Channel SFP+ optics module and LC connectors over a distance of 4 km.
CAUTION:
Electrostatic discharge (ESD) damage can occur if the components are mishandled. Always wear an
ESD-preventive wrist or heel ground strap when handling the FC Flex IO module and its
components.
WARNING: When working with optical fibres, follow all the warning labels and always wear eye
protection. Never look directly into the end of a terminated or unterminated fibre or connector
as it may cause eye damage.
1. • Position the optic so it is in the correct position. The optic has a key that prevents it from being
inserted incorrectly.
• Insert the optic into the port until it gently snaps into place.
NOTE:
1. When you cable the ports, be sure not to interfere with the airflow from the small vent holes
above and below the ports.
FC Flex IO Modules 1035