568 Fabric OS Administrator’s Guide
53-1002745-02
Forward error correction on long-distance links
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The following example enables buffer credit recovery on port 1/20.
switch:admin> portcfgcreditrecovery 1/20 -enable
Forward error correction on long-distance links
Forward error correction (FEC) on user ports is supported for LD and LS long-distance modes. Use
the portCfgLongDistance command with the -fecEnable or -fecDisable options to enable or disable
FEC, respectively, on a user port. Alternatively, you can use the portCfgFec command with the
--enable or --disable option as you would for any regular port.
For additional details about FEC, refer to “Enabling forward error correction (FEC)” on page 128.
Enabling FEC on a long-distance link
1. Connect to the switch and log in using an account assigned to the admin role.
2. Enter the portCfgLongDistance command and include the -fecEnable option, or issue the
portCfgFec command with the --enable option.
3. Enter the portCfgFec --show command to verify the configuration.
Example
switch:admin> portcfglongdistance 1/20 LS 1 -distance 122 –fecenable
FEC has been enabled.
Reserved Buffers = 982
Warning: port (132) may be reserving more credits depending on port speed.
switch:admin> portcfgfec --show 1/20
Forward Error Correction capable: YES
Forward Error Correction configured: ON
Disabling FEC on a long-distance link
1. Connect to the switch and log in using an account assigned to the admin role.
2. Enter the portCfgLongDistance command and include the -fecDisable option, or issue the
portCfgFec command with the --disable option.
3. Enter the portCfgFec --show command to verify the configuration.
Example
switch:admin> portcfglongdistance 1/20 LS 1 -buffers 500 –fecdisable
FEC has been disabled.
Reserved Buffers = 982
Warning: port (132) may be reserving more credits depending on port speed.
switch:admin> portcfgfec --show 1/20
Forward Error Correction capable: YES
Forward Error Correction configured: OFF
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