How to Configuring Router Interfaces

How to Configuring Router Interfaces

Interface configuration is one of the most important configurations of the router. Without interfaces, the router is useless.

1. Connect to a router and type the command to enter global configuration mode. Type interface ?
to see all the interfaces available on the router.



Router(config)#interface ?


The output will vary depending on the device you are connected to.


2 . Type the command interface serial ?. The output below shows a router with 2 serial

interfaces, which are labeled 0 and 1:


Router(config)#interface serial ?

<0-1> Serial interface number


3. At this point you must choose the interface you want to configure. Once you do that, you will
be in interface configuration for that interface. The command to choose serial port 1, for

example, would be:


Router(config)#interface serial 1

Router(config)-if)#


4. The router has one Ethernet 10BaseT port. Typing interface Ethernet 0 can

configure the interface.


Router(config)#int ethernet ?
<0-0> Ethernet interface number
Router(config)#int ethernet 0

Router(config-if)#


5. To configure the 2600 router, the configuration would be interface type slot/port.

For example, the Fast Ethernet interface configuration is shown below:



Router(config)#interface fastEthernet ?
<0-1> FastEthernet interface number
Router(config)#int fastethernet 0
% Incomplete command.
Router(config)#int fastethernet 0?
/
Router(config)#int fastethernet 0/?
<0-1> FastEthernet interface number



Notice that you cannot type int fastethernet 0. You must type the full command,
which is type slot/port, or int fastethernet 0/0. You can type int fa 0/0 as

well.





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