This article describes how to configure switch port security on Cisco Switches. It provides guidelines, procedures, and configuration examples. To practice and learn to configure port security on Cisco switch, just download the port security packet tracer lab or create your own lab and follow the switch port security configuration guideline.

Download Switch Port Security Configuration Packet Tracer Lab.

Port Security Guidelines and Restrictions

Follow these guidelines when configuring port security.

• A secure port cannot be a trunk port.
• A secure port cannot be a destination port for Switch Port Analyzer (SPAN).
• A secure port cannot belong to an EtherChannel port-channel interface.
• A secure port and static MAC address configuration are mutually exclusive.

Configure Switch Port Security

These sections describe how to configure port security using the Packet Tracer – Configuring Switch Port Security Lab.

In this activity, you will configure and verify port security on a switch. Port security allows you to restrict a port’s ingress traffic by limiting the MAC addresses that are allowed to send traffic to the port.

Part 1: Configure Port Security

a. Access the command line for S1 and enable port security on Fast Ethernet ports 0/1 and 0/2.

SW1>enable 
SW1#configure terminal 
Enter configuration commands, one per line.  End with CNTL/Z.
SW1(config)#interface range fastEthernet 0/1-2
SW1(config-if-range)#switchport mode access 
SW1(config-if-range)#
SW1(config-if-range)#switchport port-security 
SW1(config-if-range)#

b. Set the maximum so that only one device can access the Fast Ethernet ports 0/1 and 0/2.

SW1(config-if-range)#switchport port-security maximum 1
SW1(config-if-range)#

c. Secure the ports so that the MAC address of a device is dynamically learned and added to the running configuration.

SW1(config-if-range)#switchport port-security mac-address sticky 
SW1(config-if-range)#

d. Set the violation so that the Fast Ethernet ports 0/1 and 0/2 are not disabled when a violation occurs, but packets are dropped from an unknown source.

SW1(config-if-range)#switchport port-security violation restrict 
SW1(config-if-range)#

e. Disable all the remaining unused ports. Hint: Use the range keyword to apply this configuration to all the ports simultaneously.

SW1(config)#interface range fastEthernet 0/3-24, gigabitEthernet 0/1-2
SW1(config-if-range)#shutdown

It’s all and enough to configure switch port security on this lab. Let’s test it.

Part 2: Verify Port Security

Try to test your switch port security configuration with ping command and testing with the rogue laptop on the lab

• a. From PC1, ping PC2.
• b. Verify port security is enabled and the MAC addresses of PC1 and PC2 were added to the running configuration with “show run” command.
• c. Attach Rogue Laptop to any unused switch port and notice that the link lights are red.
• d. Enable the port and verify that Rogue Laptop can ping PC1 and PC2. After verification shut down the port connected to Rogue Laptop.
• e. Disconnect PC2 and connect Rogue Laptop to PC2’s port. Verify that Rogue Laptop is unable to ping PC1.
• f. Display the port security violations for the port Rogue Laptop is connected to.
• g. Disconnect Rouge Laptop and reconnect PC2. Verify PC2 can ping PC1.
• h. Why is PC2 able to ping PC1, but the Rouge Laptop is not?

That’s all, you need to learn about to configure switch port security on Cisco switches. If you need to study more about switch port security, try to read a book or simply read the below materials.

Default Port Security Configuration

Overview of Configure Switch Port Security

You can configure MAC addresses to be sticky. These can be dynamically learned or manually configured, stored in the address table, and added to the running configuration. If these addresses are saved in the configuration file, the interface does not need to dynamically relearn them when the switch restarts. Although sticky secure addresses can be manually configured, it is not recommended.

You can configure an interface to convert the dynamic MAC addresses to sticky secure MAC addresses and to add them to the running configuration by enabling sticky learning. To enable sticky learning, enter the switchport port-security mac-address sticky command. When you enter this command, the interface converts all the dynamic secure MAC addresses, including those that were dynamically learned before sticky learning was enabled, to sticky secure MAC addresses.

The sticky secure MAC addresses do not automatically become part of the configuration file, which is the startup configuration used each time the switch restarts. If you save the sticky secure MAC addresses in the configuration file, when the switch restarts, the interface does not need to relearn these addresses. If you do not save the configuration, they are lost

If sticky learning is disabled, the sticky secure MAC addresses are converted to dynamic secure addresses and are removed from the running configuration.

After the maximum number of secure MAC addresses is configured, they are stored in an address table. To ensure that an attached device has the full bandwidth of the port, configure the MAC address of the attached device and set the maximum number of addresses to one, which is the default.

A security violation occurs if the maximum number of secure MAC addresses has been added to the address table and a workstation whose MAC address is not in the address table attempts to access the interface.

You can configure the interface for one of these violation modes, based on the action to be taken if a violation occurs:

• Restrict—A port security violation restricts data, causes the SecurityViolation counter to increment, and causes an SNMP Notification to be generated. The rate at which SNMP traps are generated can be controlled by the SNMP-server enable traps port-security trap-rate command. The default value (“0”) causes an SNMP trap to be generated for every security violation.
• Shutdown—A port security violation causes the interface to shut down immediately. When a secure port is in the error-disabled state, you can bring it out of this state by entering the errdisable recovery cause psecure-violation global configuration command or you can manually re-enable it by entering the shutdown and no shutdown interface configuration commands. This is the default mode.

You can also customize the time to recover from the specified error-disable cause (default is 300 seconds) by entering the errdisable recovery interval command.

Source: Cisco

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The post How to Configure Switch Port Security on Cisco Switches? appeared first on TECHNIG.

Short and complete guide to configure SSH on Cisco router and switch for secure remote connection. The Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. The best-known example application is for remote login to computer systems by users.

SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH server. Common applications include remote command-line login and remote command execution, but any network service can be secured with SSH. The protocol specification distinguishes between two major versions, referred to as SSH-1 and SSH-2.

The typical use of SSH Protocol

The protocol is used in corporate networks for:

• providing secure access for users and automated processes
• interactive and automated file transfers
• issuing remote commands
• managing network infrastructure and other mission-critical system components.

Configure SSH on Cisco Router or Switch

To configure SSH on Cisco router, you need to do:

1. Enable SSH on Cisco router.
2. Set Password for SSH.
3. Force remote access to use SSH.
4. Enable Password Encryption.
5. Add domain name Server (DNS).
6. Add Username and Password.

Let’s enable and configure SSH on Cisco router or switch using the below packet tracer lab. The configure on a packet tracer lab and real Cisco devices are the same. Just try to learn and do it what the SSH remote authentication needs.

Download the packet tracer lab or create your own lab. SSH Configuration Packet Tracer Lab.

In this example, I just enable and configure SSH on SW1 and trying to access it from PC1. It’s enough to learn how to configure SSH on Cisco router.

R1>
R1>enable 
R1#configure terminal 
Enter configuration commands, one per line.  End with CNTL/Z.
R1(config)#
R1(config)#ip domain-name Technig.com
R1(config)#crypto key generate rsa 
The name for the keys will be: R1.Technig.com
Choose the size of the key modulus in the range of 360 to 2048 for your
  General Purpose Keys. Choosing a key modulus greater than 512 may take
  a few minutes.

How many bits in the modulus [512]: 1024
% Generating 1024 bit RSA keys, keys will be non-exportable...[OK]

R1(config)#
*Mar 1 0:5:57.974:  %SSH-5-ENABLED: SSH 1.99 has been enabled 
R1(config)#
R1(config)#username Admin password Technig
R1(config)#line vty 0 4
R1(config-line)#login local 
R1(config-line)#transport input ssh 
R1(config-line)#exit
R1(config)#ip ssh version 2
R1(config)#ip ssh authentication-retries 3
R1(config)#
R1(config)#ip ssh time-out 120
R1(config)#exit
R1#

That’s all. Let’s check the process one by one.

1. I have set DNS domain name with “IP domain-name” command.
2. Then configure the router to use RSA key pair with modulus size of 1024 bites for remote service authentication with “crypto key generate rsa” command.
3. Add username “Admin” with Password of “Technig” for ssh authentication.
4. Enabled ssh with “line vty 0 4” command.
5. Configure ssh to use local username and password with “login local” command. Remember that you can set a username and password for ssh with “username Admin password Technig” command as well. But here we configure ssh to use local username and password.
6. Configure the router to accept only ssh connection with “transport input ssh” command.
7. Configure ssh to version 2 using “IP ssh version 2” and set the authentication times to 3 with “IP ssh authentication-retries 3” command.
8. Finally set the ssh timeout to 120 seconds with “IP ssh time-out 120” command.

Related Article: Install SSH on CentOS 8.x and Red Hat Linux

The final step is to test the connectivity of ssh from PC1 with “ssh -l Admin 192.168.1.1” command for command prompt.

C:\>ssh -l Admin 192.168.1.1
Open
Password: 


R1>en
R1>enable 
Password: 
R1#

OK, the ssh works perfectly.

The post How to Configure SSH on Cisco Router or Switch? appeared first on TECHNIG.

If you faced with the below error when you try to configure banner motd on Cisco switch or router. You can easily fix Cisco Motd banner ASCII art using this MOTD Banner configuration guide.

SW1(config-line)#motd-banner !No Access for You?!
^
% Invalid input detected at '^' marker.

It means that you did not type the banner motd command correctly. Let’s test it and configure banner motd on Cisco switch and router using packet tracer.

What is MOTD Banner?

A banner is a message presented to a user who is using the Cisco switch. The type of banner you configured for use determines when this message is shown. You can configure three main types of banners on your Cisco switch, as shown here:

• The message of the Day (MOTD): This type of login message has been around for a long time on Unix and mainframe systems. The idea of the message is to display a temporary notice to users, such as issues with system availability.

  However, because the message displays when a user connects to the device before login, most network administrators are now using it to display legal notices regarding access to the switch, such as unauthorized access to this device is prohibited and violators will be prosecuted to the full extent of the law and other such cheery endearments.

• Login: This banner is displayed before login to the system, but after the MOTD banner is displayed. Typically, this banner is used to display a permanent message to the users.

• Exec: This banner displays after the login is complete when the connecting user enters User EXEC mode. Whereas all users who attempt to connect to the switch see the other banners, only users who successfully log on to the switch see this banner, which can be used to post reminders to your network administrators.

SW1#enable 
SW1#configure terminal 
Enter configuration commands, one per line. End with CNTL/Z.
SW1(config)#banner motd #Admin Access only!#
SW1(config)#

Now, the Motd banner has configured on a Cisco switch. Let’s test it what is going on?

Press RETURN to get started!
Admin Access Only
User Access Verification
Password: 

Yes, you can see the message that prompts you before user authentication.

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It’s a simple way you can learn to configure PAP and CHAP in Cisco router using this packet tracer lab. Just download the lab or create your own lab with packet tracer and follow the instruction to easy configure PAP and CHAP authentication protocols in a Cisco router.

Configure PAP and CHAP in Cisco Router

In this activity, you will practice configuring PPP encapsulation on serial links. You will also configure PPP PAP
authentication and PPP CHAP authentication.

Part 1: Review Routing Configurations

Step 1: View running configurations on all routers.

• While reviewing the router configurations, note the use of both static and dynamic routes in the topology.

Step 2: Test connectivity between computers and the web server.

• From PC and Laptop, ping the web server at 209.165.200.2. Both ping commands should be successful.
  Remember to give enough time for STP and EIGRP to converge.

Part 2: Configure PPP as the Encapsulation Method

Step 1: Configure R1 to use PPP encapsulation with R3.

Enter the following commands on R1:

R1(config)# interface s0/0/0
R1(config-if)# encapsulation ppp

Step 2: Configure R2 to use PPP encapsulation with R3.

Enter the appropriate commands on R2:

R2(config)# interface s0/0/1
R2(config-if)# encapsulation ppp

Step 3: Configure R3 to use PPP encapsulation with R1, R2, and ISP.

Enter the appropriate commands on R3:

R3(config)# interface s0/0/0
R3(config-if)# encapsulation ppp
R3(config)# interface s0/0/1
R3(config-if)# encapsulation ppp
R3(config)# interface s0/1/0
R3(config-if)# encapsulation ppp

Step 4: Configure ISP to use PPP encapsulation with R3.

a. Click the Internet cloud, then ISP. Enter the following commands:

Router(config)# interface s0/0/0
Router(config-if)# encapsulation ppp

b. Exit the Internet cloud by clicking Back in the upper left corner or by pressing Alt+left arrow.

Step 5: Test connectivity to the web server.

PC and Laptop should be able to ping the web server at 209.165.200.2. This may take some time as
interfaces start working again and EIGRP reconverges.

Part 3: Configure PPP Authentication

Step 1: Configure PPP PAP Authentication Between R1 and R3.

Note: Instead of using the keyword password as shown in the curriculum, you will use the keyword secret to
provide a better encryption of the password.

a. Enter the following commands into R1:

R1(config)# username R3 secret class
R1(config)# interface s0/0/0
R1(config-if)# ppp authentication pap
R1(config-if)# ppp pap sent-username R1 password cisco

b. Enter the following commands into R3:

R3(config)# username R1 secret cisco
R3(config)# interface s0/0/0
R3(config-if)# ppp authentication pap
R3(config-if)# ppp pap sent-username R3 password class

Step 2: Configure PPP PAP Authentication Between R2 and R3.

Repeat step 1 to configure authentication between R2 and R3 changing the usernames as needed. Note that
each password sent to each serial port matches the password expected by the opposite router.

R2(config-if)# username R3 secret class
R2(config)# interface s0/0/1
R2(config-if)# ppp authentication pap
R2(config-if)# ppp pap sent-username R2 password cisco

R3(config-if)# username R2 secret cisco
R3(config)# interface s0/0/1
R3(config-if)# ppp authentication pap
R3(config-if)# ppp pap sent-username R3 password class

Step 3: Configure PPP CHAP Authentication Between R3 and ISP

a. Enter the following commands into ISP. The hostname is sent as the username:

Router(config)# hostname ISP
ISP(config)# username R3 secret cisco
ISP(config)# interface s0/0/0
ISP(config-if)# ppp authentication chap

b. Enter the following commands into R3. The passwords must match for CHAP authentication:

R3(config)# username ISP secret cisco
R3(config)# interface serial0/1/0
R3(config-if)# ppp authentication chap

Step 4: Test connectivity between computers and the web server.

From PC and Laptop, ping the web server at 209.165.200.2. Both ping commands should be successful.
Remember to give enough time for STP and EIGRP to converge.

Step 4: Test connectivity between computers and the web server.

From PC and Laptop, ping the web server at 209.165.200.2. Both ping commands should be successful.
Remember to give enough time for STP and EIGRP to converge.

Note: This is the Cisco Network Academy lab, you can join the netacad.com website to learn the entire CCNA.

Download the Lab: PAP and CHAP Configuration or CCNA Packet Tracer Lab

That is all you need to learn to configure PAP and CHAP in Cisco Router. Let’s see what is the difference between PAP and CHAP authentication protocols?

What is the Difference Between PAP and CHAP?

The password authentication protocol (PAP) and challenge handshake authentication protocol (CHAP) are both used to authenticate PPP sessions and can be used with many VPNs. Basically, PAP works like a standard login procedure; the remote system authenticates itself to the user a static username and password combination. The password can be encrypted for additional security, but PAP is subject to numerous attacks. In particular, since the information is static, it is subject to password guessing as well as snooping.

CHAP takes a more sophisticated and secure approach to authentication by creating a unique challenge phrase (a randomly generated string) for each authentication. The challenge phrase is combined with device hostnames using one-way hashing functions to authenticate in a way where no static secret information is ever transmitted over the wire. Because all transmitted information is dynamic, CHAP is significantly more robust than PAP.

Another advantage of CHAP over PAP is that CHAP can be set up to do repeated midsession authentications. This is useful for dial-up PPP sessions and other sessions where a port may be left open even though the remote device has disconnected. In this case, its possible for someone else to pick up the connection mid-session simply by establish physical connectivity.

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The post How to Configure PAP and CHAP in Cisco Router? appeared first on TECHNIG.

Configure Static Routing is the routing that network administrator configures the network routers manually, instead of using routing protocols RIP, OSPF, etc. which utilized in the dynamic routing. The benefits of static routing are minimum bandwidth usage, no overhead on router CPU and much more and perfect for a small network with a few routers. But it is not without cons. It ‘s hard to configure all routers manually in the vast network and troubleshooting is always harder than configuration.

As a network administrator or student of CCNA, you must know the configuration of static routing. It helps you understand the process and functions of routing in the network apparently.

Configure Static Routing Using Cisco Packet Tracer

To perform this task, you must create a lab and configure the basic IP addressing for all PCs and Routers or download my CCNA Lab – Static Route with Cisco packet tracer. CCNA Lab – Static Route – no Configure.

I have configured the Static Route the same as the screenshot, and it is not yet configured routing. You must configure it with below step by step Static Routing guide.

Static Routing command syntax: Ip route [destination network address] [mask] [next hop address or interface name]

1. In the R1 type the following commands to introduce two LANs 192.168.10.0/24 and 192.168.30.0/24 for Router 1.

R1(config)#ip route 192.168.30.0 255.255.255.0 10.10.20.2 150
R1(config)#ip route 192.168.10.0 255.255.255.0 10.10.10.2 150

2. Router2: Add three networks for router 2 and be sure that do not configure it with wrong IP address.

R2(config)#ip route 192.168.10.0 255.255.255.0 10.10.10.1 150
R2(config)#ip route 10.10.10.0 255.255.255.0 10.10.20.1 150
R2(config)#ip route 192.168.20.0 255.255.255.0 10.10.20.1 150

3. Router3: Do the same as router 2 but with different destination and exit interface address.

R3(config)#ip route 192.168.30.0 255.255.255.0 10.10.20.1 150
R3(config)#ip route 10.10.20.0 255.255.255.0 10.10.10.1 150
R3(config)#ip route 192.168.20.0 255.255.255.0 10.10.10.1 150

So it’s easy and not too much difficulty. If you want to accomplish this task, firstly you must try to understand the concept of routing and then try to configure it.

You can download the complete Static Routing Lab from the link below and look at the routing configuration with ‘show ip route or show run‘ commands.  CCNA Lab – Static Route. If you have any question, please feel free to ask us.

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Configure DHCP on Cisco Router. Last week we published a topic about installation and configuration of DHCP Server in Windows Server 2012 R2. We have introduced the DHCP Server “Install and Configure DHCP Server on Windows Server 2012 R2” and told the necessary services and network protocols requirement if you don’t know the basic of DHCP Server? you must read the article first.

Create and Configure a CCNA Lab within Cisco Packet Tracer.

Download the DHCP configuration in Cisco router lab of packet tracer from the end of this post or try to create your own network lab with two routers and their LAN networks and then configure it with the following step by step guide.

Configure the Router 1 with below IP address and initial configuration. I assume you know and understand the basic router and Switch configuration clearly. So no need to explain the functions of the basic router and switch commands line.

Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#hostname R1
R1(config)#interface serial 0/0/0
R1(config-if)#ip address 10.10.10.1 255.255.255.252
R1(config-if)#no shutdown

R1(config-if)#clock rate 64000
R1(config-if)#

For Router 2, configure the same interface serial 0/0/0 and FastEthernet 0/0 with the following commands.

Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname R2
R2(config)#interface serial 0/0/0
R2(config-if)#ip address 10.10.10.2 255.255.255.252
R2(config-if)#no shutdown

R2(config-if)#

R2(config)#interface fastEthernet 0/0
R2(config-if)#ip address 192.168.10.1 255.255.255.0
R2(config-if)#no shutdown

Configure DHCP on Cisco Router Using Packet Tracer

Let’s configure Router 2 as DHCP Server and set the clients to get their IP address from DHCP Server in Cisco Router.

In the R2 while you are in the config mode, type the command ‘IP DHCP excluded-address 192.168.10.1 192.168.10.20‘ and then press enter. This command ‘ip dhcp excluded-address’ will create an exclusive range of IP addresses which reserved for Network Servers and DHCP Server will not assign them to clients.

The ‘ip dhcp pool‘ command creates a pool for a network. You can create many pools on a router for all Local area network that connected to the router.

R2>enable
R2#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
R2(config)#ip dhcp excluded-address 192.168.10.1 192.168.10.20
R2(config)#ip dhcp pool Technig_Clients
R2(dhcp-config)#
R2(dhcp-config)#network 192.168.10.0 255.255.255.0
R2(dhcp-config)#default-router 192.168.10.1
R2(dhcp-config)#dns-server 192.168.10.100
R2(dhcp-config)#

Now go to client setting and set the IP Configuration to DHCP and see the client get a new IP address from DHCP Server.

So that’s it, configure DHCP on Cisco router within a minute! Simple and easy.

DHCP Relay on Cisco Router

Remember some DHCP options (DHCP Relay Agent) when you need to provide IP addresses from a DCHP server to clients that are outside of your network or are not in the same Local Area Network. You must use the ‘ip helper-address‘ to forward the DHCP client requests to the remote host.

Configure the R1 to relay the DHCP client request. It does not work without routing. So configure Routers with static or dynamic routing. Here I’m testing with RIP.

R1>enable
R1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)#interface fastEthernet 0/0
R1(config-if)#ip helper-address 10.10.10.2
R1(config-if)#exit

R1(config)#router rip
R1(config-router)#network 10.10.10.0
R1(config-router)#network 192.168.30.0
R1(config-router)#exit

Go to the client IP configuration setting and see the forwarded request by DHCP Server.

Hope you learn the configuration of the DHCP Server on the Cisco Router and Download the DHCP on Cisco Router Packet Tracer.

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Here is the complete guide to new CCNA v3 exams. Its combination of two topics, one by CBTNugget and the other is by reddit. So read and watch it carefully and find out what is new in CCNA v3 and what should you do for upgrading your CCNA certifications?

The Cisco usually refreshes their flagship certifications every few years, and Tuesday they announced a version update to CCNA Routing and Switching. Cisco expert Jeremy Cioara spent a few minutes at the beginning of his webinar Building a Technology Lab to talk about the changes to CCNA v3, what they mean, and when we’ll update our training.

In this short video, Jeremy covers the changes you should expect in the new ICND1 100-105, ICND2 200-105, and CCNA 200-125:

The post What is New in CCNA v3 Exams 100-105, 200-105, 200-125? appeared first on TECHNIG.

CCNA is one of the top paying IT certifications, a Cisco certified network associate with most valuable routing and switching knowledge. I have collect the step by step guides of CCNA articles in this post, named Packet Tracer CCNA Practical Labs for those who are new in CCNA.

The best way to learn about networking is to do it. Hands-on equipment gets students started, but is limited to the number of devices in the lab. That’s why the Cisco Networking Academy curriculum includes Cisco Packet Tracer, an innovative network configuration simulation tool used for teaching, gaming, and assessment. Cisco Packet tracer is a network simulator software for CCNA exams preparation. This simulation software will help you quickly create a lab and start configuring like a real Cisco devices. It support most routing, switching, wireless, and basic firewall devices with latest IOS.

Cisco Packet Tracer CCNA Practical Labs

The labs are downloadable with step by step configuration guide. To practice and test this labs, you need to have Cisco packet tracer installed on your computer.

1. Configure Static Routing in Packet Tracer

• A complete guides to configure static routing that network administrator need to configure the network routers manually instead of using routing protocols, RIP or OSPF. The benefits of static routing is minimum bandwidth usage, no overhead on router CPU and many more and perfect for small network with a few routers. But it is not without cons. Difficult to configure all routers manually in the large network and troubleshooting is always harder than configuration.

2. How to Configure Routing Information Protocol (RIP)

• This is about how to configure Routing Information Protocol (RIP) on the Cisco Routers. The RIP is one of the oldest distance-vector routing protocols and work perfectly with IPv4. The next generation of routing information protocol for IPv6 is know as RIPng (RIP next generation). So in this article we are going to test the RIP with IPv4.

3. How to Configure OSPF Routing Protocol

• Configuration of OSPF routing protocol is easy as RIP Routing. The Open Shortest Path First (OSPF) is a routing protocol for wide area networks and enterprise network. OSPF is perhaps the most widely used interior gateway protocol (IGP) in large enterprise networks. The IS-IS, is another link-state dynamic routing protocol, which is more common in large service provider networks. The most widely used exterior gateway protocol is the Border Gateway Protocol (BGP), the principal routing protocol between autonomous systems on the Internet.

4. How to Configure DHCP on Cisco Router?

• Configure DHCP on Cisco Router. The last week we had send a topic about installation and configuration of DHCP Server in Windows Server 2012 R2. We have introduced the DHCP Server and told the necessary services and network protocols requirement. If you don’t know the basic of DHCP Server? you must read the article first.

5. How to Configure Standard Access List On Cisco Router?

• The Standard Access List (ACL) on Cisco router works to permit or deny the entire network protocols of a host from being distinguishing. These decisions are all based on source IP address which filter network traffic by examining the source IP address in a packet. We can create the standard IP access list by using the access-list command with numbers 1 to 99 or in the expanded range of 1300 to 1999.

6. Configure VLAN on Cisco Switches Using Cisco Packet Tracer

•  Configuring VLAN or Virtual Local area network on Cisco Switches is a most important subject of CCNA exam. A VLAN is a switched network that is logically segmented by function, project team, or application, without regard to the physical locations of the users. VLANs have the same attributes as physical LANs, but you can group computers even if they are not physically located on the same LAN segment. Any switch port can belong to a VLAN, and unicast, broadcast, and multicast packets are forwarded and flooded only to end stations in the VLAN. Each VLAN is considered a logical network, and packets destined for stations that do not belong to the VLAN must be forwarded through a router or bridge or layer 3 switches. Because a VLAN is considered a separate logical network.

7. Configure Inter VLAN Routing on a Cisco Router and Layer 3 Switches

• This is another Packet Tracer CCNA Practical Labs about how to configure Inter VLAN Routing on the Cisco router or layer 3 switches? Basically on a VLAN no host can communicate with hosts within other VLANs. It means only hosts that are members of the same VLAN can communicate with each other. So if you want your VLANs hosts can communicate with each others, you must configure inter VLAN routing using a router or a layer 3 switch. Here we completely show you the Inter-VLAN configuration using a Cisco router and a layer 3 switch.

8. How to Enable Telnet and SSH on Cisco Router and Switches?

• This article focus on configuring and enabling telnet and ssh on Cisco routers and switches. The Telnet is an old and non secure application protocol of remote control services. You can configure telnet on all Cisco switches and routers with the following step by step guides. But it’s not the best way on the wide area network. However we just going to enable telnet and ssh to test them for CCNA Certification exams.

9. Configure SNMP Protocol on Cisco Packet Tracer?

• Simple Network Management Protocol (SNMP) is used for network monitoring and management. It is made up of 3 parts, the SNMP manager, SNMP agent and Management Information Base (MIB). In Packet Tracer there is not a lot you can actually do with SNMP but it is possible to set up a router or switch as an SNMP agent and use a PC or laptop as an MIB browser. So although you can’t set SNMP traps or informs it is still a valuable learning tool to show the sort of information that can be retrieved and even a few things that can be set on an SNMP agent.

10. Configure Frame Relay In Cisco Router Using Packet Tracer

• Frame relay is a packet-switching protocol for connecting devices on a Wide Area Network (WAN). Here we are going to show you, how to configure Frame relay in Cisco routers using Cisco Packet Tracker. The Frame relay originally designed for transport across Integrated Services Digital Network (ISDN) infrastructure, it may be used today in the context of many other network interfaces. Read more about Frame relay on Wikipedia.

It’s not all, we will updates this post with fresh new articles related to CCNA as Packet Tracer CCNA Practical Labs.

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