assign router ip address cisco

How to Configure IP Addresses on a Cisco Router

Configuring routers is a routine operation for network administrators. Enterprise-grade routers are very different from consumer-grade routers, though. Consumer-grade routers come mostly configured out of the box. Likewise, consumer-grade ISP services typically configure home ‘routers’ with a dynamic IP address. 

In contrast, business-grade ISP services assign static IP addresses. Before an enterprise-grade router can be installed in a network, it needs to have an IP address assigned to it first. So, we will walk through how to configure an IP address on a Cisco router today.

Configuring a Cisco router with an IP address is not a complicated process. There are typically four steps involved:

Verify the current interface configuration of the router

Choose the interface that you want to assign an IP address to

Assign the IP address

Enable the interface on the Cisco router

We will walk through each of those steps, explain how to complete them, and why they are essential. 

An Overview of How to Configure IP Addresses on Cisco Devices [VIDEO]

In this video, Jeremy Cioara covers assigning IP addresses and enabling interfaces on Cisco routers. Unlike switches, which are essentially plug and play, routers require a bit of configuration before they can do what they were designed to. You'll see a straightforward, four-step process to enabling interfaces that will equip you to do this yourself.

How to Display Interfaces on a Cisco Device

Before you assign an IP address to a Cisco router, you need to know the current configuration of that device. Typically, Cisco routers have all their interfaces shut down out of the box. Therefore, we need to verify the state of those interfaces before proceeding, especially if this router is being re-used. 

The rest of the instructions through this article will assume that you are connected to the Cisco router. 

To show the interfaces in a Cisco router, use the ‘show IP interface brief’ command in the console window. For example, this command will output the following information:

Each interface and interface name

The IP address for that interface

Whether each interface is up or down on the Layer 1 level (status column)

Whether each interface is up or down on the Layer 2 level (protocol column)

The Status and Protocol columns will have one of three messages:

Administratively Down

Each message has a clear indication of the status of its associated interface. The ‘Up’ message is self-explanatory. That means that the associated interface is working correctly. The ‘Administratively Down’ message indicates that the interface is disabled by configuration. Otherwise, the network admin purposefully disabled that interface for some reason. Finally, the ‘Down’ message means the associated interface isn’t working for other reasons (like unplugging the network cable from the network port). 

Out of the box, Cisco routers have the ‘Administratively Down’ configuration for each interface. This is different from Cisco Switches. Cisco Switches come pre-configured out of the box. They can be safe to implement into an existing network almost right away. On the other hand, an unconfigured router can make a network inoperable. 

That’s because an improperly configured router can send data from the network into a black hole. Routers are the pieces of equipment that push data to and from networks or network segments. If a router isn’t correctly configured, it won’t know where to send that information to. Hence, that data is sent to purgatory. It is simply dropped from the network. 

So, you need to verify the status of the interfaces on a Cisco router before you configure an IP address for it. We need to configure as much of the router as possible before connecting it to a network, so this is an excellent first step. 

What is the Difference Between Status and Protocol on a Cisco Router?

When you use the ‘show IP interface brief’ command in the console when connected to a Cisco router, the router will dump information about each interface on the router to the console display. That information will include the link-state labeled as ‘Status’ and ‘Protocol.’

Many new network admins may not understand the difference between both states. After all, aren’t they both the same?

The ‘Status’ and ‘Protocol’ states represent different layers of the OSI networking model , though. The ‘Status’ column represents Layer one, or the physical connection layer. The ‘Protocol’ column represents Layer 2 of the OSI model. The physical layer explains whether a cable is physically connected or if the physical hardware for that interface is working correctly. The protocol layer explains whether that interface is receiving signals that it can understand and recognize. 

Understanding the difference between Layer 1 and Layer 2 and their operational status is essential for configuring Cisco routers and diagnosing issues with them down the road. 

How to Choose an Interface to Assign an IP Address on a Cisco Device

When we configure an IP address for a new Cisco router, we need to verify the current state of the interfaces of that router. After we confirm the state of those interfaces, we need to select an interface in the console before configuring an IP address. This process is easy. 

Running the ‘show IP interface brief’ command in the console of a Cisco router will list each interface and the designation for those interfaces. Pay attention to those interfaces. Also, make sure to match the interface in the console with the physical interface on the Cisco router. That way, you don’t plug the ethernet cable into the wrong port. 

To select an interface in the console, first enter the global configuration mode in the router. Then, use the ‘configure terminal’ command in the console to enter configuration mode. 

After switching to the configuration mode in the router, use the ‘interface’ command followed by the interface itself to select that interface. You can also add a question mark after the ‘interface’ command instead of the interface designation for additional help. 

Interface g0/0

In the example above, we used interface g0/0. That means we selected the first interface that is a gigabit ethernet port on our router. The interfaces in your Cisco router may be labeled differently depending on the device you are configuring. 

How to Assign an IP Address to a Cisco Router

Before we can assign an IP address to a Cisco router, we need to complete a couple of steps. First, we need to run the ‘show IP interface brief’ command. This will list each interface in the router as well as their status. Then, we need to enter global configuration mode with the ‘configure terminal’ command and select an interface using the ‘interface’ command in the console of that router. The ‘interface’ command must be followed by the interface designation. Once we have our interface selected, we can assign an IP address to it. 

Assigning an IP address to an interface in a Cisco router is as simple as using the ‘IP address’ command. That command must be followed by the IP address for that interface port as well as its subnet.

Ip address 192.168.1.1 255.255.255.0

Entering that command will not produce any confirmation messages unless there was an error. In this case, no news is good news. 

After assigning the IP address to an interface in a Cisco router, run the ‘show IP interface brief’ command again. When that command displays information about each interface in the router, you should see the IP address assigned to your chosen interface under the IP address column. If you do not, try repeating the process. 

That’s it! It’s that simple to assign an IP address to a Cisco router.

How to Find the IP Address to Assign to a Cisco Router

Many new network admins may not understand where to find the IP address to assign to a new Cisco router. Those admins may have received that information from a senior network administrator or through documentation, but if those resources aren’t available, where would you find the IP address to assign to a Cisco router?

Often, that information comes from the ISP (Internet Service Provider). Businesses will typically choose to have a static IP address assigned to them from their ISP. 

This is done for stability reasons. In a dynamic environment, the external IP address of a network can be changed by the ISP. If your business hosts something like a VPN , though, that could be an issue. Static IP addresses keep network configurations static for things like VPNs or DNS entries. 

This is in stark contrast to the typical consumer-grade ISP connection. In these cases, the ISP will always use DHCP to assign a network address to consumer customers. But, of course, a business can use DHCP addresses, too. This is more common with small and medium-sized companies that may not need to host services that depend on a static IP address. 

Cisco routers can be configured to use DHCP instead of being assigned a static IP address, too. To do that, add ‘dhcp’ instead of the IP address and subnet mask to the ‘IP address’ command in the console in a Cisco router.

Ip address DHCP

How to Enable an Interface on a Cisco Router

After configuring an IP address for a Cisco router, you will most likely need to enable the interface to be active. Cisco routers come with all the interfaces on them shut down out of the box. This is for important network safety reasons. So, the interface you just configured needs to be enabled. 

First, we can verify a Cisco router’s status and configuration using the ‘show run’ command from the configuration console for a Cisco device. That command will display all the current information for that device and its interfaces. More than likely, the information displayed from that command will be too much to fit on your screen. Use the space button to jump through the configuration information.

Look for the configuration information for the interface you need to enable. This should show that the interface is currently administratively down. 

Once the status of that interface has been verified, we need to enable it. First, we need to select that interface. Use the ‘interface’ command in the console followed by the interface name.

E.g., interface GigabitEthernet0/0

In our example, the name of the interface we are working with is GigabitEthernet0/0. Of course, the name of the interface you are working with may be different.

Now that the interface is selected, use the ‘no shutdown’ command to enable that interface. If all goes well, you should see three messages. The first message shows that the interface is down. The next two messages should state that the ‘Status’ and ‘Protocol’ are now up. You should also see lights blinking next to the physical interface port that you just configured on the router. 

Remember that the status and protocol states in a Cisco router represent different layers of the OSI network model. The status state represents layer 1, while the protocol state represents layer 2. This is why the console shows two different status prompts after running the ‘no shutdown’ command. 

Wrapping Up

We covered a lot of information in this article! Consider this guide a rough tutorial on assigning an IP address to a Cisco router. Still, we did not cover other important topics like what a subnet is or how to secure a router. If you would like to learn more, consider our CCNA training . 

Though assigning an IP address to a Cisco router is easy, it is also very routine. Furthermore, this is a function that you will perform a lot as a network admin. So, let’s go over how to assign an IP address to a Cisco router with a short and sweet tl;dr instruction set.

Verify the interface status with the ‘show IP interface brief’ command.

After verifying all interfaces are down, enter global configuration mode with the ‘configure terminal’ command.’

Select the interface you want to configure with the ‘interface’ command followed by the interface name.

Assign an IP address to that interface with the ‘ip address’ command followed by the IP address and the subnet mask for that interface.

Run the ‘show IP interface brief’ command again to verify the IP address has been assigned to the network interface. 

Run the ‘no shutdown’ command to enable that interface. 

That’s it! Keep these instructions handy until they become second nature. Businesses use static IP addresses for all sorts of things, but above all else, they use static IP addresses to keep networks from breaking or requiring additional maintenance. Understanding how to assign an IP address to a Cisco router is vital for any network admin.

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How to configure a Cisco Router?

Introduction

In this blog, we will discuss about how you can Configure a Cisco Router. Router, an essential network device that connects two or more packet-switched networks or subnetworks, is something that every network engineer must become familiar with. 

Cisco routers are world-famous for their advanced analytics, application optimization, automated provisioning, and integrated security capabilities that deliver users with a complete and proven solution.

You can find Cisco routers for networks of all types and sizes in the market, but first, it’s crucial to understand which router series will serve your purpose.

You can view all routers by Cisco here .

Cisco Router Functions

Cisco router functions – They serve two primary functions that are:

• They manage traffic between packet-switched networks or subnetworks by forwarding data packets to their intended IP addresses.
• They allow multiple devices such as PC, tablets, mobile to use the same Internet connection.

Types of Cisco Router

There are different types of routers to serve these two primary functions, such as a wireless router and a wired router. Also, many specialized types of routers serve specific functions like a core router, edge router, and virtual router.

Here are different types of Cisco routers:

Wireless Router:

It uses an ethernet cable to connect to a modem. A wireless router converts packets from binary code into radio signals and then wirelessly broadcasts them using antennae. Wireless routers create WLANs that connect multiple devices using wireless communication.

Wired Router:

Wired routers are similar to wireless routers that use an ethernet cable to connect to a modem. They create LANs using separate cables to connect to one or more devices within the network and then to the Internet.

Core Router:

Core routers come in handy to large corporations and businesses that transmit a high volume of data packets within their network. They operate at the network’s internet backbone or “core” and do not communicate with external networks.

Edge Router:

An edge router communicates with both core routers and external networks, unlike core routers. They are placed at the “edge” of a network and use the BGP to send and receive data from other LANs and WANs.

Virtual Router:

A router that performs the same function as a standard hardware router but is a software application is called a Virtual router.

In this article, we will discuss how to Configure a Cisco Router by using basic networking commands.

After reading this article, you would be able to do some basic configurations on a router manufactured by Cisco. To perform and explain the configurations on a router, we will use Packet Tracer Network Simulator software provided officially by Cisco. You can practice these commands by installing Packet Tracer in your devices or using a real Cisco router. There is no difference between both methods as long as your selected simulator contains the commands we are using in this tutorial.

 So, here is how you configure a Cisco router by using Cisco Packet Tracer.

Step 1: Create a Lab in Packet Tracer

To configure a Cisco router you need to create a lab in the Packet Tracer first as shown below:

This is just a practice lab, and it will not affect any network configuration on your device.

It is not mandatory to use the same topology; you can modify it according to your wish. However, it is recommended to use the same to understand the commands explained more clearly.

Step 2: Access Command Line Interface

Access the CLI (Command Line Interface) by clicking on Router 1.

Say no when asked if you would like to enter the initial configuration dialog of the router.

Good To Remember:

There are various command modes, and following are the some of the main command modes:

1) User EXEC Mode Router>

2) Privileged EXEC Mode Router#

3) Global Configuration Mode Router(config)#

4) Interface Configuration Mode Router(config-if)#

5) Sub Interface Configuration Mode Router(config-subif)#

Step 3: Enter the Privileged EXEC Mode

To enter the Privileged EXEC Mode, you have to use the command ‘enable’ in the CLI of Router 1.

Router>enable

Step 4: Switch to Global Configuration Mode

Switch to the Global Configuration Mode by using the command ‘configure terminal’ in the Privileged EXEC Mode.

Router#configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#

Step 5: Change the router name

Change the default router name from ‘Router’ to ‘R1’.

You can configure any desired name on the router as per the topology you’re creating. This helps you to differentiate the device from other devices in the network. The command to change name is ‘hostname name’.

Router(config)#hostname R1

Step 6: Assign IP Addresses

Assign IP Addresses to the interfaces of Router 1.

Assigning IP to the router is very important and is required to make your router be able to forward packets from/to networks.

I am configuring 192.168.1.1 and 192.168.2.1 on interface fa 0/1 and fa 0/0, respectively.

Commands to configure IP Address and make the interface fa 0/1 up:

R1(config)#

R1(config)#interface fa 0/1

R1(config-if)#ip address 192.168.1.1 255.255.255.0

R1(config-if)#no shutdown

R1(config-if)#

%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up

Commands to configure IP Address and make the interface fa 0/0 up:

R1(config)#interface fa 0/0

R1(config-if)#ip address 192.168.2.1 255.255.255.0

%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up

Step 7: Assign IP Address to R2

Assign the IP Address on the interfaces of Router 2.

I am configuring 192.168.1.2 and 192.168.3.1 on interface fa 0/0 and fa 0/1, respectively.

R2(config)#

R2(config)#interface fa 0/0

R2(config-if)#ip address 192.168.1.2 255.255.255.0

R2(config-if)#no shutdown

R2(config-if)#

R2(config)#interface fa 0/1

R2(config-if)#ip address 192.168.3.1 255.255.255.0

%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up.

After assigning the IP Addresses and turning on the ports, you’ll observe the link lights turning green. This represents that the port is now in forwarding mode and can be used to transmit the data.

Step 8: Assign IP Address to PC

Assigning IP addresses to the PC

Click on PC A and open the Desktop Tab.

Go to the IP Configuration and assign IP Address 192.168.2.2 with the default subnet mask 255.255.255.0 and gateway 192.168.2.1 on PC A

Click on PC B, open the Desktop Tab, and go to the IP Configuration. Assign IP address 192.168.3.2 with the default subnet mask 255.255.255.0 and gateway 192.168.3.1

Now, we are moving to probably the most exciting part. Yes, you guessed that right, configuring routing. 

Step 9: Configure Routing

Configure routing on Router 1 and Router 2.

The main purpose or requirement of a router is to forward packets to different networks using the best path, and this purpose can be achieved by configuring routing on the router.

We will configure static routes on both of the routers so that the data can be transmitted from network 192.168.2.0 to 192.168.3.0 and vice versa.

Commands to add a route to 192.168.3.0 in the routing table of Router 1:

R1(config)#ip route 192.168.3.0 255.255.255.0 192.168.1.2

Commands to add route to 192.168.2.0 in the routing table of Router 2:

R2(config)#ip route 192.168.2.0 255.255.255.0 192.168.1.1

Step 10: Check connectivity

Checking the connectivity between devices.

We will now ping from PC A to PC B to check if they can communicate.

Click on PC A, go to the Desktop Tab, and click on Command Prompt.

Use the command ‘ping IP Address of Destination ’

Packet Tracer PC Command Line 1.0

C:\>ping 192.168.3.2

Pinging 192.168.3.2 with 32 bytes of data:

Request timed out.

Reply from 192.168.3.2: bytes=32 time<1ms TTL=126

Ping statistics for 192.168.3.2:

Packets: Sent = 4, Received = 2, Lost = 2 (50% loss),

Approximate round trip times in milli-seconds:

Minimum = 0ms, Maximum = 0ms, Average = 0ms

As you get a reply from the destination 192.168.3.2, we can conclude that the practical was successful, and a connection between two devices under different networks has started.

So, this is how you can configure a cisco router and successfully make them communicate with each other.

Frequently Asked Questions

Q1 – how do i add a dns server to my cisco router.

Step 1 – Access the router configuration mode through a terminal or web interface.

Step 2 – Configure the DNS server using the command “ip name-server “, replacing with the actual IP address.

Step 3 – Save the configuration using the command “write memory” to ensure the changes persist after a reboot.

Q2 – What is router configuration?

Router configuration refers to the process of setting up and customizing the settings of a router to meet specific requirements. It involves accessing the router’s administrative interface or command-line interface and making changes to various parameters such as network interfaces, IP addressing, routing protocols, security settings, and more.

Q3 – How do I configure my router IP address?

Step 1 – Access the router’s configuration mode through terminal or web-based interface. Step 2 – Identify the specific interface you want to configure (e.g., GigabitEthernet0/0). Step 3 – Use the command “interface ” followed by “ip address ” to set the desired IP address and subnet mask. Save the configuration to ensure persistence.

Q4 – How to find router IP address?

Step 1 – Open the Command Prompt by pressing Windows Key + R, typing “cmd,” and hitting Enter. Step 2 – In the Command Prompt window, type “ipconfig” and press Enter. Step 3 – Look for the “Default Gateway” entry under the network adapter you are currently using. The IP address listed there is your router’s IP address.

You may also like – Hub vs Switch vs Router

We have now covered the steps to configure a Cisco router and various other things related to Cisco Routers. Finally, installing a Cisco router may appear to be a difficult task, particularly for people who are new to networking or have limited technical understanding. However, with the appropriate approach and understanding, it is possible to turn it into a manageable work. We hope you were able to understand how to configure a router in Cisco Packet Tracer.

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Configure IP Address For an Interface in Cisco

The interface is the port at which the router connects to a given network. It acts as an entry or exit point for data that is to be transmitted through the router. Every interface must be labeled or assigned an IP address, which should be unique among all the IP addresses in the network. 

In Cisco Packet Tracer, to understand the process of assigning IP addresses , we will be using routers. This is because a router has many interfaces to connect to different networks and also after configuring a router by any routing protocol( RIP , static routing , etc.), we can observe how an interface and an IP address work in a router. 

Steps to configure an IP address for an interface of a router in Cisco Packet Tracer:

Step 1: Open Cisco Packet Tracer and select the following devices:

IPv4 Addressing Table:

• Create the following topology and label the configuration as shown in the figure:

• Also, assign the respective IP addresses and default gateways to all 4 PCs.

Step 2: In Cisco Packet Tracer, assigning IP addresses to an interface of a router can either be done through the command line or the GUI mode. Both of them are discussed as follows:

Through command line mode:

• Firstly, enter the command line by clicking on any router and then selecting the CLI tab.
• Enter config mode by typing the following commands in the command line:
• Now we can assign IP addresses to their respective interfaces. To do this, firstly we need to enter into the interface we want to assign the IP address. This is done by typing the keyword interface followed by the label of the interface.

Interface [label of the interface]:

For example:

• After entering the interface, type the command IP address followed by the IP address you want to assign and also followed by the subnet mask of the IP address assigned.

IP address [IP address to be assigned] [subnet mask of the IP address]

• After assigning the IP address type, the command no shutdown to activate the port. Initially, all the ports of the router are switched off, so we need to manually activate them. You would also note that the color of the triangles representing the ports of the router changes to green and also start pointing upward.
• At last, exit the interface by typing the following command:
• Repeat the above steps for all the interfaces of the router, and then for all interfaces of other routers as well.

Following is the image of the command line of the router after configuring all interfaces:

For a better understanding of the process, you may refer to the following simulation:

Through GUI mode:

• Click on any router and select the Config tab from the above tabs.
• Now find the interface to which you want to assign the IP address, from the tabs available on the left side of the window.

• After selecting the interface, fill in the IP address and the subnet mask in the fields named IPv4 Address and Subnet Mask .

• Activate the port by checking the checkbox labeled as On for the Port Status option.

The interface of the router has been assigned an IP address.

Simulation Result:

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• Cisco 900 Series Industrial Routers

Published On: August 6ᵗʰ, 2019 02:01

Cisco 910 Industrial Router Software Configuration Guide, Release 1.0

Assigning ip address and domain name server.

This chapter describes how to create the initial router configuration (for example, assigning the IP address and default gateway information) for the Cisco 910 Industrial Routers ( hereafter referred to as the router) by using a variety of automatic and manual methods.

This chapter consists of these sections:

Understanding the Boot Process

Assigning router information, checking and saving the running configuration, reload of the software image.

To start your router, you need to follow the procedures in the Quick Start Guide or the hardware installation guide for installing and powering on the router and for setting up the initial router configuration (IP address, subnet mask, secret and Telnet passwords, and so forth).

The normal boot process involves the operation of the boot loader software, which performs these activities:

• Performs low-level CPU initialization. It initializes the CPU registers, which control where physical memory is mapped, its quantity, its speed, and so forth.
• Performs power-on self-test (POST) for the CPU subsystem. It tests the CPU DRAM and the portion of the flash device that makes up the flash file system.
• Initializes the compact flash file system on the system board.
• Loads a default operating system software image into memory and boots up the router.

The boot loader provides access to the flash file system before the operating system is loaded. Normally, the boot loader is used only to load, uncompress, and launch the operating system. After the boot loader gives the operating system control of the CPU, the boot loader is not active until the next system reset or power-on.

Before you can assign router information, make sure you have connected a PC or terminal to the console port, and configured the PC or terminal-emulation software baud rate and character format to match these of the router console port:

• Baud rate default is 115200.
• Data bits default is 8.

Note If the data bits option is set to 8, set the parity option to none.

• Stop bits default is 1.
• Parity settings default is none.

You can assign IP information through a DHCP server or manually.

Use a DHCP server for centralized control and automatic assignment of IP information after the server is configured.

These sections contain this configuration information:

Understanding DHCP

Manually assigning ip information.

DHCP provides configuration information to Internet hosts and internetworking devices. This protocol consists of two components: one for delivering configuration parameters from a DHCP server to a device and a mechanism for allocating network addresses to devices. DHCP is built on a client-server model, in which designated DHCP servers allocate network addresses and deliver configuration parameters to dynamically configured devices.

DHCP client support is enabled on a per interface basis on the router for automatic IPv4 address assignment.

The DHCP server, which supplies the IP addresses to the router interfaces, does not need to be on the same subnet as the router. However, when the DHCP server and the router are on different subnets, DHCP relay must be active in the network. Generally, DHCP relay is configured on a router in the path between the router and the DHCP server.

Configuring DHCP

This section includes the following topics:

Enabling DHCP on Interfaces

Configuring the dns.

To assign IP address by negotiation via DHCP, use the ip address dhcp privileged EXEC command.

Beginning in privileged EXEC mode, follow these steps to enable DHCP on interfaces:

Name Servers

Dns operation.

When your network devices require connectivity with devices in networks for which you do not control the name assignment, you can assign device names that uniquely identify your devices within the entire internetwork using the domain name server (DNS). DNS uses a hierarchical scheme for establishing host names for network nodes, which allows local control of the segments of the network through a client-server scheme. The DNS system can locate a network device by translating the hostname of the device into its associated IP address.

On the Internet, a domain is a portion of the naming hierarchy tree that refers to general groupings of networks based on the organization type or geography. Domain names are pieced together with periods (.) as the delimiting characters. For example, Cisco is a commercial organization that the Internet identifies by a com domain, so its domain name is cisco.com. A specific hostname in this domain, the File Transfer Protocol (FTP) system, for example, is identified as ftp.cisco.com.

Name servers keep track of domain names and know the parts of the domain tree for which they have complete information. A name server might also store information about other parts of the domain tree. To map domain names to IP addresses on the router, you must identify the hostnames, specify a name server, and enable the DNS service.

You can configure the router to use one or more domain name servers to find an IP address for a host name.

A name server handles client-issued queries to the DNS server for locally defined hosts within a particular zone as follows:

An authoritative name server responds to DNS user queries for a domain name that is under its zone of authority by using the permanent and cached entries in its own host table. When the query is for a domain name that is under its zone of authority but for which it does not have any configuration information, the authoritative name server replies that no such information exists.

A name server that is not configured as the authoritative name server responds to DNS user queries by using information that it has cached from previously received query responses.

Beginning in privileged EXEC mode, follow these steps to manually assign IP information to multiple interfaces:

To remove the router IP address, use the no ip address interface configuration command. If you are removing the address through a Telnet session, your connection to the router will be lost.

For information on setting the router system name, protecting access to privileged EXEC commands, and setting time and calendar services, see Chapter5, “Administering the Router”

You can check the configuration settings that you entered or changes that you made by entering this privileged EXEC command:

To store the configuration or changes you have made to your startup configuration in flash memory, enter this privileged EXEC command:

This command saves the configuration settings that you made. If you fail to do this, your configuration will be lost the next time you reload the system. To display information stored in the NVRAM section of flash memory, use the show startup-config privileged EXEC command.

The reload command halts the system. If the system is not set to manually boot up, it reboots itself. Use the reload command after you save the router configuration information to the startup configuration ( copy running-config startup-config ).

If your router is configured for manual booting, do not reload it from a virtual terminal. This restriction prevents the router from entering the boot loader mode and thereby taking it from the remote user’s control.

If you modify your configuration file, the router prompts you to save the configuration before reloading. During the save operation, the system requests whether you want to proceed with the save if the CONFIG_FILE environment variable points to a startup configuration file that no longer exists. If you proceed in this situation, the system enters setup mode upon reload.

Custom Book

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Assign IP address to switch, router and PC in packet tracer

How to assign an IP address to the switch, router, and PC in the Cisco packet tracer?

Assigning the IP address is the first step while creating a network in packet tracer. Before proceeding with any other configuration, we must assign the appropriate IP address and design the correct IP addressing scheme for the network.

Assigning IP address to switch in packet tracer

As the switch is a layer 2 device, we cannot assign the IP address to the layer 2 device however IP address can be assigned to the virtual interface.

We can assign the IP address to the VLAN1 interface.

The following commands can be used to configure the IP address on the Cisco switch

Switch(config)#interface vlan 1

Switch(config-if)#ip address 192.168.1.1 255.255.255.0

Switch(config-if)#no shut

Configure the IP address  on the router in packet tracer

We can assign the IP address on the different types of available interfaces on the router like Ethernet, fast Ethernet, serial, etc.

To assign the IP address, we will enter into the interface configuration mode and then the IP address can be assigned to the router.

The following commands can be used to configure the IP address on the Cisco router

Router(config)#interface gigabitEthernet 0/0

Router(config-if)#ip address 192.168.10.1 255.255.255.0

Router(config-if)#no shutdown

Configure PC IP address in the Cisco packet tracer

To configure the IP address on a PC, laptop, or server, we have to open the IP configuration utility provided in the packet tracer.

To assign the static IP address, we will select the static option available and then we will configure the IP address manually.

Please check the image below showing the manually configured IP address. To assign the IP address through DHCP, we must select the DHCP option however we should have the DHCP server configured to lease the IP address to the devices.

After assigning the IP addresses to different devices, we can check the connectivity with the ping command.

If we have configured the devices with the correct IP addresses then we can further develop our network in the packet tracer.

To assign appropriate IP addresses, we should know how IP subnets work. And how we can create different networks while setting up the network in simulation or the real world?

To learn IPv4 subnetting, you can check subnetting practice questions available for different classes of subnets.

Related Posts

How to connect pc to switch and router in cisco packet tracer, use of no cdp enable and no cdp run, vtp configuration in cisco packet tracer, leave a reply cancel reply.

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