SGS-6341 Series Command Guide
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4.1.2 combo-forced-mode
Command:
combo-forced-mode { copper-forced | sfp-forced }
Function:
Sets to combo port mode (combo ports only).
Parameters:
copper-forced forces use of copper cable port;
sfp-forced forces use of fiber cable port.
Command mode:
Port Mode.
Default:
The default setting for combo mode of combo ports is sfp-forced.
Usage Guide:
The combo mode of combo ports and the port connection condition determines the active port of the combo ports. A
combo port consists of one fiber port and a copper cable port. It should be noted that the speed-duplex command
applies to the copper cable port while the negotiation command applies to the fiber cable port, they should not conflict.
For combo ports, only one, a fiber cable port or a copper cable port, can be active at a time, and only this port can
send and receive data normally.
Note:
1. Combo port is a conception involving the physical layer and the LLC sublayer of the datalink layer. The status of a
combo port will not affect any operation in the MAC sublayer of the datalink layer and upper layers. If the bandwidth
limit for a combo port is 1Mbps, then this 1Mbps applies to the active port of this combo port, regardless of the port
type being copper or fiber.
2. If a combo port connects to another combo port, it is recommended for both parties to use copper-forced or
fiber-forced mode.
3. Run show interface under Admin Mode to check for the active port of a combo port .The following result indicates if
the active port for a combo port is the fiber (or copper) cable port: Hardware is Gigabit-combo, active is fiber (or
copper)
Example:
Setting ports 1/0/21-24 to fiber-forced.
Switch(config)#interface ethernet 1/0/21-24
Switch(Config-Port-Range)#combo-forced-mode sfp-forced
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