Configuring Fec - Cisco MDS 9000 Series Configuration Manual

Configuring Fibre Channel Interfaces
0 CRC, 0 unknown class
0 too long, 0 too short
326 frames output, 21364 bytes
0 discards, 0 errors
0 input OLS, 0 LRR, 1 NOS, 0 loop inits
3 output OLS, 2 LRR, 0 NOS, 0 loop inits
16 receive B2B credit remaining
64 transmit B2B credit remaining

Configuring FEC

FEC has the following restrictions:
• FEC is supported on the DS-X9334-K9, DS-X9648-1536K9, and DS-X9448-768K9 modules in the
• FEC fallback is not supported on the Cisco MDS 9700 48-Port 32-Gbps Fibre Channel Switching Module
• Modifying FEC configuration briefly disrupts traffic on the port.
• FEC can be configured only on fixed speed 16-Gbps Fibre Channel ports. FEC is not supported for ports
• 32-Gbps Fibre Channel ports come up automatically in FEC. You do not have to configure the ports
• From Cisco MDS NX-OS Release 6.2(11c), FEC with Transmitter Training Signal (TTS) is supported
• From Cisco MDS NX-OS Release 8.2(1), FEC with TTS feature is supported in Simple Network
• DM uses SNMP to get switch updates.
To configure FEC on an interface on the 48-port 16-Gbps Fibre Channel switching module, perform these
steps:
Step 1
switch# configure terminal
Cisco MDS 9700 Series switch. FEC is also supported on the Cisco MDS 9132T Fibre Channel Switch
and Cisco MDS 9396S Multilayer Fabric Switch.
(DS-X9648-1536K9) when its interfaces are configured at 16-Gbps Fibre Channel fixed speed. However,
FEC fallback is supported on the Cisco MDS 9700 48-Port 16-Gbps Fibre Channel Switching Module
(DS-X9448-768K9) when its interfaces are configured at 16-Gbps Fibre Channel fixed speed.
configured with 2000/4000/8000/auto/auto-max maximum speed.
using the switchport fec and switchport fec tts commands, as they are meant only for 16-Gbps Fibre
Channel ports and have no effect on 32-Gbps Fibre Channel ports.
on the Cisco MDS 9396S 16-Gbps Multilayer Fabric Switch and Cisco MDS 9700 48-Port 16-Gbps
Fibre Channel Switching Module (DS-X9448-768K9), except in Cisco MDS NX-OS Release 6.2(13).
From Cisco MDS NX-OS Release 8.2(1), FEC with Transmitter Training Signal (TTS) is supported by
default and cannot be disabled on the Cisco MDS 9132T Fibre Channel Switch and Cisco MDS 9700
48-Port 32-Gbps Fibre Channel Switching Module (DS-X9648-1536K9).
Management Protocol (SNMP) and Device Manager (DM). This feature is not supported in Cisco MDS
NX-OS Release 8.1(1) or earlier.
Note
FEC is supported in DM.
Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x
Configuring FEC
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