How To Configure DHCP Server On A Cisco Router. DHCP (Dynamic Host Configuration Protocol) is the protocol used by network devices (such as PCs, network printers, etc) to automatically obtain correct network parameters so they can access network and Internet resources such as IP Address, Default Gateway, Domain Name, DNS Servers and more. A DHCP Server is considered necessary in today's networks. Devices usally found providing this service are Windows servers, routers and layer 3 switches. This article describes how to configure basic DHCP parameters on a Cisco router, enabling it to act as a DHCP server for your network. Example Scenario. Best Cpu Speed Test Software.

Virtual Internet Routing Lab Personal Edition (VIRL PE) is Cisco's powerful network virtualization and orchestration platform that enables the development of highly. This lesson provides and introduction to Cisco CCP, How to install CCP and how to configure Cisco router for CCP (Cisco Configuration Professional).

For the sake of this article, suppose we have the network shown in the following diagram, for which we would like to enable the DHCP service on our Cisco router. The router will act as a DHCP server for the 1. IP Addresses already assigned to our switch (1. File Server (1. 92.

DHCP pool, to ensure they are not given out to other hosts and cause an IP address conflict. First step is to enable the DHCP service on our router, which by default is enabled. First step is to enable the DHCP service on our router, which by default is enabled: R1# configure terminal. R1(config)# service dhcp. Next step is to create the DHCP pool that defines the network of IP addresses that will be given out to the clients. Note that 'NET- POOL' is the name of the DHCP IP Pool we are creating: R1(config)# ip dhcp pool NET- POOLR1(dhcp- config)# network 1. This tells the router to issue IP addresses for the network 1.

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We will have to exclude the IP addresses we want later on. We now define the DHCP parameters that will be given to each client. These include the default gateway (default- router), dns servers, domain and lease period (days): R1(dhcp- config)# default- router 1. R1(dhcp- config)# dns- server 1.

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R1(dhcp- config)# domain- name Firewall. R1(dhcp- config)# lease 9 The domain- name and lease parameters are not mandatory. By default, the lease time for an IP address is one day, however we can specify any time range we need. For example, if we need to set the lease time for 4 hours and 3.

DHCP pool: R1(dhcp- config)# lease 0 4 3. The above command is interpreted as follows: 0 (Zero) days, 4 hours and 3.

All we need now is to exclude the IP addresses we don't want our DHCP server giving out. Drop back to 'global configuration mode' and enter the following: R1(config)# ip dhcp excluded- address 1. R1(config)# ip dhcp excluded- address 1. This excludes IP addresses 1. As you can see, there's an option to exclude a range of IP addresses or a specific address. The above configuration is all you need to get the DHCP server running for your network. We'll provide a few more commands you can use to troubleshoot and ensure it's working correctly.

The following command will allow you to check which clients have been served by the DHCP: R1# show ip dhcp binding Bindings from all pools not associated with VRF: IP address Client- ID/ Lease expiration Type. Hardware address/User name.

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PM Automatic. R1#Notice that IP addresses 1. Article Summary. In this article we've covered how a Cisco router can be used as a basic DHCP server and the various options available. We also saw how you can obtain general information about the service. There are more options available with the DHCP service, however this basic article should cover most of your network needs.

Future DHCP articles will explore advanced options and debugging for more complex networks containing VLANs and IP Telephony. If you have found the article useful, we would really appreciate you sharing it with others by using the provided services on the top left corner of this article. Sharing our articles takes only a minute of your time and helps Firewall. About The Writer.

Ammar Muqaddas is a CCNA certified Engineer, CCNA Instructor and member of the Firewall. Team. Back to Cisco Routers Section.

How to reset a Cisco router to factory default (removing the startup configuration file). To reset a Cisco router to factory default (removing the startup configuration file), perform these steps. To erase the configuration file, issue the erasenvram: command.

Reload the router by issuing the reload command. You should see this ROMmon prompt. Change the configure register value to ignore the startup configuration by issuing the confreg command, as shown in this example. To reload the router, issue the reset command, as shown in this example. After the router boots, issue the enable command at the Router > prompt. The prompt changes to Router#, indicating that the router is now in privileged mode. You should now see a Router(config)# prompt.

To save the blank configuration, issue the copy- running config- startup config command.