| 3.2 | Basic Configuration of the Switch | ||
| 3.2.7 | Defining line mode on a switch |
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Full-duplex is the simultaneous action of transmitting and receiving data by two devices. This operation is achievable only if the devices on each end support full-duplex. Full-duplex links not only double potential throughput, but also eliminate collisions and the need for each station to wait until the other station finishes transmitting. If reads and writes on a full-duplex link are symmetric, data throughput can be theoretically doubled. However, in reality, bandwidth improvements are more modest. Full-duplex links are particularly useful for server-to-server, server-to-switch, and switch-to-switch connections. To set the duplex mode of an interface on a Cisco IOS software-based switch, enter the following command in interface configuration mode:
Note: Use the auto argument only for fixed Fast Ethernet TX ports. In auto-negotiation mode, the switch attempts to negotiate full-duplex connectivity with the connecting device. If negotiation is successful, the port operates in full-duplex mode. If the connecting device is unable to operate in full duplex, the port operates in half duplex. This process is repeated whenever there is a change in link status. The example in Figure To set the port duplex mode on a set-based switch, enter the following command in privileged mode:
where
Use the show
port command to verify your
configuration. The example in Figure
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