Configuring an Ethernet Interface : How to Configure an Ethernet Interface of a CISCO Router
The Ethernet interface of a CISCO router can be configured from the console or through a virtual terminal line. The configuration of a CISCO router is very simple and easy. At first, you have to select the interface and then the IP address. Remember, each Ethernet interface must have an IP address and a subnet mask. This page contains all the information to configure the ethernet interface of a CISCO router.
Steps to configure the Ethernet interface of a CISCO router:
The steps to configure a CISCO Ethernet interface is described below:
Step 1:
At first, enter the global configuration mode and then enter the interface mode. For example, to enter interface mode, you have to type interface fastEthernet0/0 command. Here, 0/0 means the port no or port slot. Put the Ethernet interface port/port slot according to the desired port you want to configure.
Step 2:
Now, configure the IP address and the subnet mask. Please, careful to use the correct subnet address.
Step 3:
At last, turn on the interface.
Pracitcal Example of a CISCO Router's Ethernet Interface Configuration
Let we have a CISCO router and there is a port fastEthernet0/0 which we want to configure. The
IP address of that port will be 192.168.1.1 and subnet mask will be
255.255.255.0. The interface must be turned on.
Router Configuration Command
Router>enable Router#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#interface fastEthernet0/0 Router(config-if)#ip address 192.168.1.1 255.255.255.0 Router(config-if)#no shutdown %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up Router(config-if)#exit Router(config)#
Discussion of the above command
Before configuring the router, we access the global configuration mode. After accessing global configuration mode, we select the interface which we want to configure by the command interface fastEthernet0/0 and then set the IP address by the command ip address 192.168.1.1 255.255.255.0. At last use the command no shutdown command to up the router.
Test yourself
You have given a CISCO router. You have to configure base on the following specifications:
- Configure fastEthernet4/0 port
- Assign IP address (172.16.56.1/24 )
Answer / Solution: Click the following link
Cisco Router Configuration Example
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