Users Guide

Layer 2 Switching Commands 398
User Guidelines
Dell EMC Networking switches implement receive flow control only. They
never issue a flow control PAUSE frame when congested, but do respect
received flow control PAUSE frames received from other switches. Disabling
flow control causes the switch to ignore received PAUSE frames.
Interface specific configuration overrides any global configuration.
Changing the flow control setting on a copper port restarts auto-negotiation
and causes a brief link-flap while auto-negotiation occurs. Changing the flow
control setting on a fiber port may cause a brief link flap as the PHY is reset.
Enabling flow control on some ports and not others can lead to excessive
packet loss in situations where some ports on the switch have been paused
and the internal packet buffers are consumed. This situation may cause traffic
loss on other ports that are not congested or flow controlled.
Example
console(config)#flowcontrol receive off
console(config)#flowcontrol receive on
forward-error-correction
Use this command to configure the forward error correction for
25G/50G/100G Ethernet interfaces.
Syntax
forward-error-correction { disable-fec | enable-fec-cl74 | enable-fec-cl91 |
enable-fec-cl108 | inherit }
• interface-id—A configurable Ethernet interface identifier.
Default Configuration
The default setting is inherit.
Command Mode
Interface (Ethernet) Configuration mode
User Guidelines
This command is only available on the N2200 and N3200 Series switches.