Cisco router

Cisco 1841is a highly capable router that provides the full feature set needed for small or remote office connectivity to the Internet or other private networks. Dynamic Host Configuration Protocol (DHCP) service is one of the features supported by therouteur 1841 ciscoand must be enabled if the router is expected to provide dynamic Internet Protocol (IP) addressing to hosts on the private network. The DHCP feature includes many options; however, you can set up a standard configuration in about 30 minutes.

Tips:DHCP service is one of many features that you can enable on a Cisco 1841 router.

Things you’ll use

Cisco serial console cable

• Microsoft Windows XP computer with 9-pin serial port
• Network IP number and subnet mask intended for the network
• IP address for the network DNS server
• IP address for the network default gateway
• IP address of a local FTP server
• Name of the directory where DHCP logs can be stored on the FTP server
• Credentials of an account that has access to the FTP server

Instructions to Configure a DHCPcisco modular router 1841Step by Step

Step1.Connect the Cisco serial console cable into the 9-pin serial port on the back of the computer and then connect the other end of the serial console cable into the serial console port on the router 1841.

Step2.Select the "Start" button on Windows XP and then select "All Programs" in the menu that appears. Then select "Accessories."

Step3.Choose the "Communications" program group and then select the "Hyperterminal" icon.

Step4.Enter "cisco routers 1841" in the window that appears and touch the "Enter" key. Then select the "Connect using:" menu and click the "Com" port that is connected to the Cisco 1841 from the list that displays. Click the "OK" button.

Step5.Select the "Bits per second" menu and then choose "9600" from the list that appears. Select the "Flow control:" menu and choose "None" in the list that appears. Select the "OK" button.

Step6.Tap the "Enter" key a few times and the Cisco CLI (Command Line Interface) will appear.

Step7.Enter "enable" on the command prompt and then press the "Enter" key. Type the "enable" password if requested and then tap the "Enter" key.

Step8.Type "config t"on the command prompt and then press the "Enter" key. Then type "service dhcp" and press the "Enter" key.

Step9.Type "ipdhcp database ftp://user:password@ip_address/dhcp_logs write-delay 120" except replace the "ip_address " with the FTP server IP address, the "user:password" with the account name and password for the FTP server,cisco 1841 security bundle routerand "dhcp_logs" with the name of the directory where the DHCP logs will be stored on the FTP server. Press the "Enter" key.

Step10.Type "ipdhcp pool pool_name" except replace "pool_name" with a name for the DHCP address pool and then press the "Enter" key. Then type "network 10.0.0.0 255.0.0.0" except replace the "10.0.0.0 255.0.0.0" with the network IP number and subnet mask of the DHCP scope of addresses to be configured for the network.

Step11.Type "dns-server ip_address" except replace "ip_address" with the actual IP address of the DNS server for the network and then press the "Enter" key.

Step12.Type "default-router ip_address" except replace "ip_address" with the default gateway IP address for the network and then press the "Enter" key.

Step13.Type "end" at the command prompt and press the "Enter" key. Type "copy run start" and press the "Enter" key to save the configuration.