- [Narrator] Individual switch port settings
can be modified if needed,
to match the settings of a directly connected device.
The default on most switch ports is auto-sensing.
Half-duplex communication
means that traffic can only be sent in one direction
at a time.
A good analogy of half-duplex is a single runway airport.
Airplanes can either take off or land,
but not both at the same time.
A full duplex switch port can both send and receive
at the same time.
A good analogy of a full duplex switch port is an airport
with two runways, one for inbound traffic
and one for outbound traffic.
2950 switch ports can be configured for either mode.
Switch ports can transmit at 10, 100
or even 1,000 Megabits per second.
The default setting for a 2950 port is auto-sensing.
This means the port will try to automatically negotiate
the best settings with the attached device.
However, the duplex and speed
may need to be manually configured if the port
is having difficulty validating these settings
with the attached device.
You should be aware that manually configuring ports
can cause duplex mismatches,
which may significantly degrade network performance.
Additionally, you should always keep track of any change
to switch port settings, as you may need to change them back
at a later date or time.
I'm now going to show you how to change
both the duplicity on the port speed on the west switch
for the port attached to the west host one.
Click on the switch.
Expand the window.
I'm going to configure from the terminal.
Hit enter.
The command is an interface based command,
so I've got to go ahead and type interface.
The interface that the host attaches to
is fast ethernet 0/2,
the speed setting, as you can see, I have a choice of 10,
100 or auto.
I'm going to go ahead and select speed for 10.
I'm going to now change the duplex,
again with a question mark.
I have a choice of auto, full or half.
I'm going to set the duplex to be half.
The port goes down and then it comes back up
as it's resetting the port.
Additionally, it's always a best practice
to configure description on interfaces.
Just a way to document and convey information
about the network topology.
The interface description command is also entered
at the interface configuration mode.
I'm going to go ahead and set an interface description here
to show my connection to the west host one.
The command is description and then the string,
connection
to
west
host
one.
Enter.
Command takes.
Control Z, all the way out.
We'll go ahead and do a show run.
Spacebar.
I'm going to verify my settings on my fast ethernet 0/2 port.
You can see the description,
the connection to west host one.
I have my duplex set to half and my speed is 10.
Spacebar
takes me all the way out,
and that is how you change the settings on the port.