Layer 2 Switching Commands 387Changing the flow control setting on a copper port restarts auto-negotiationand causes a brief link-flap while auto-negotiation occurs. Changing the flowcontrol 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 excessivepacket loss in situations where some ports on the switch have been pausedand the internal packet buffers are consumed. This situation may cause trafficloss on other ports that are not congested or flow controlled.Exampleconsole(config)#flowcontrol receive offconsole(config)#flowcontrol receive oninterfaceUse this command to configure parameters for the Gigabit Ethernet and ten-Gigabit Ethernet ports, and for port-channels. While in Global Configurationmode, enter the interface command (with a specific interface). To exit toGlobal Configuration mode, enter exit. To return to Privileged Exec mode,press Ctrl-Z or enter end.Additional forms of the interface command enable configuring VLANs, tunnels, theloopback interface, the out-of-band interface, and ranges of interfaces. Seeinterface vlan , interface tunnel , arp, and interface range .Syntaxinterface {gigabitethernet unit/slot/port | port-channel port-channel-number| tengigabitethernet unit/slot/port | fortygigabitethernet unit/slot/port}Default ConfigurationThis command has no default configuration.Command ModeGlobal Configuration, Interface Configuration
