Configuring SFP

Configure SFP+

Perform this task when installing or reconfiguring SFP+ modules on compatible Cisco devices.


Note

Several Cisco platforms, NIMs, and SM cards support configuring multiple-rate SFPs on the same interface, for example, 1G SFP or 10G SFP+ on a 10G port. In a port-channel bundle, all member interfaces should use the same speed and duplex setting. Use duplex interfaces with the same speed as member interfaces to configure a port-channel.

For more information about interfaces that support multiple-rate SFPs, see the corresponding datasheets.

Procedure

Step 1

enable source-interfacegigabitethernetslot/port

Example:


Router# enable

This command enables privileged EXEC mode. Enter your password if prompted.

Step 2

configure terminal

Example:


Router# configure terminal

Enters the global configuration mode.

Step 3

interfacetengigabitethernet slot/port

Example:


Router(config)# interfacetengigabitethernet4/11

Specifies the 10-Gigabit Ethernet interface to be configured.

Here:

slot or port—Specifies the location of the interface.

The SFP+ interface is configured and ready for use.

Configure FEC

Forward Error Correction checks and recovers potential errors during long-range data transmission. Because the Cisco Catalyst 8500L Edge Platforms have long-range SFP, FEC must be configured.

Follow these steps to configure FEC:

Procedure

Step 1

enable source-interfacegigabitethernetslot/port

Example:


Router# enable

Enables the privileged EXEC mode. If prompted, enter your password.

Step 2

configure terminal

Example:


Router# configure terminal

Enters the global configuration mode.

Step 3

interfacetwentyfivegigabitethernet slot/port

Example:


Router(config)# interfacetwentyfivegigabitethernet0/0/164/11

Specifies the 25-gigabit Ethernet interface to be configured.

Here:

slot/port specifies the location of the interface.

Step 4

fec { auto | cl108 | cl74 | off }

Example:


Router(config)# interfacetwentyfivegigabitethernet0/0/164/11

Configures FEC on the 25-Gigabit Ethernet interface.

The fec command supports these modes:

  • auto—Enables FEC based on SFP type

  • cl108—Enables clause108 <= RS-FEC(528,514)

  • cl74—Enables clause74 <= FC-FEC

  • disable—Disables FEC on interface

Note

 

  • The fec command is only applicable to 25G links.

  • For 10- or 25-Gbps dual-rate SFP modules, if the speed changes from 25 Gbps to 10 Gbps, remove the fec configuration before changing the speed.

The interface uses the FEC mode you configured to improve error detection and correction during transmission.