INTERFACE COMMANDS

When using the negotiation command to enable auto-negotiation, the optimal settings will be determined by the capabilities command. To enable flow control under auto-negotiation, “flowcontrol” must be included in the capabilities list for any port

Avoid using flow control on a port connected to a hub unless it is actually required to solve a problem. Otherwise back pressure jamming signals may degrade overall performance for the segment attached to the hub.

Example

The following example enables flow control on port 5.

Console(config)#interface ethernet 1/5

Console(config-if)#flowcontrol

Console(config-if)#no negotiation

Console(config-if)#

Related Commands

negotiation (4 -170)

capabilities (flowcontrol, symmetric) (4-172)

combo-forced-mode

This command forces the port type selected for combination ports 21 - 24 or 45-48. Use the no form to restore the default mode.

Syntax

combo-forced-mode mode no combo-forced-mode

mode

copper-forced- Always uses the built-in RJ-45 port.

copper-preferred-auto- Uses the built-in RJ-45 port if both combination types are functioning and the RJ-45 port has a valid link.

sfp-forced- Always uses the SFP port (even if a module is not installed).

sfp-preferred-auto- Uses SFP port if both combination types are functioning and the SFP port has a valid link.

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SMC Networks SMC8624/48T manual Combo-forced-mode, Following example enables flow control on port