Configure FEC on a Port
About this task
Use this procedure to configure Forward Error Correction (FEC) on supported ports.
Procedure
Examples
Configure Clause 108 FEC on a 25 Gbps port 1/1:
Switch:1>enable Switch:1#configure terminal Switch:1(config)#interface gigabitethernet 1/1 Switch:1(config-if)#fec cl108
Verify the configuration when a 25 Gbps optic is present:
Switch:1(config-if)#show interfaces gigabitEthernet config 1/1 ========================================================================================== Port Config ========================================================================================== PORT DIFF-SERV QOS MLT VENDOR NUM TYPE EN TYPE LVL ID NAME ------------------------------------------------------------------------------------------ 1/1 25GbCX true core 1 0 Extreme ========================================================================================== Port Config ========================================================================================== PORT ADMIN OPERATE AUTO ACCESS-SERV RMON FLEX-UNI ADMIN APPLICABLE OPERATE NUM ROUTING ROUTING RECOVER EN FEC FEC FEC ------------------------------------------------------------------------------------------ 1/1 Enable Disable Disable false Disable Disable Auto CL108 CL108
Verify the configuration when a 10 Gb optic is present in a 25 Gb port:
Switch:1(config-if)#show interfaces gigabitEthernet config 1/1 ================================================================================================ Port Config ================================================================================================ PORT DIFF-SERV QOS MLT VENDOR NUM TYPE EN TYPE LVL ID NAME ------------------------------------------------------------------------------------------------ 1/1 10GbSR true core 1 0 Extreme PORT ADMIN OPERATE AUTO ACCESS-SERV RMON FLEX-UNI ADMIN APPLICABLE OPERATE NUM ROUTING ROUTING RECOVER EN FEC FEC FEC ------------------------------------------------------------------------------------------------ 1/1 Enable Disable Disable false Disable Disable Auto Not Applicable Off
Variable Definitions
The following table defines parameters for the fec command.
Variable |
Value |
---|---|
port {slot/port[/sub-port] [-slot/port[/sub-port]] [,...]} |
Identifies the slot and port in one of the following formats: a single slot and port (slot/port), a range of slots and ports (slot/port-slot/port), or a series of slots and ports (slot/port,slot/port,slot/port). If the platform supports channelization and the port is channelized, you must also specify the sub-port in the format slot/port/sub-port. |
{auto | cl108 | cl74 | cl91} |
Configures one of the following options for FEC on the port:
Note:
On a 100 GbE port, only the Clause 91 and Clause 108 options are supported. On 100 GbE channelized ports (operating at 25 Gbps speed), you can configure Clause 108 for extra latency or Clause 74 for reduced latency. Configuration of FEC is not supported on a management port or on 100 GbE ports operating at 40 Gbps speed. Important:
On ports that support FEC, always configure the same option on both end-points. Otherwise, the link does not come up. |