What is “traceroute” command? How does it work on Windows OS?
The traceroute command is a network troubleshooting tool used to trace the path of data packets from one host to another. It works by sending out a series of TCP/IP packets with increasing Time-To-Live (TTL) values. As each packet passes through switches and routers, the TTL value is decremented until it reaches 0, at which […]
How to setup Fortigate firewall with Cisco core switches configured with VLANs?
Configuring a Fortigate Firewall is an important step for any network administrator. It not only ensures that the firewall is set up correctly, but also helps keep the network secure from any potential threats. In this article, we will discuss how to configure a Fortigate Firewall using CLI, from its first setup to more advanced […]
What is dynamic routing in Cisco? How to create dynamic routing on router devices?
Dynamic routing is a feature of Cisco routers that allows them to adjust routing paths based on changes in the network environment. It allows for more efficient use of router resources and helps ensure that traffic is routed optimally. With dynamic routing, router devices can automatically select the best route for data packets to reach […]
What is Spanning Tree Protocol? How to implement STP on multiple switch or router environment? How many STP modes are there?
Spanning Tree Protocol (STP) is a Layer 2 protocol used to prevent loops in the network by creating a logical topology of the network. It is used in Cisco IOS devices such as switches and routers to ensure redundant links are not creating broadcast storms and loops. STP works by assigning each switch or router […]
Extended ACL list for enterprise network system. Download
In this simulation you can find all necessary configuration. You can download .pkt Cisco Package Tracer file and open it on your computer. There are 5 VLAN configured and 1 extended ACL implemented on whole VLANs. Basically, hit CLI tab on the switch which you want to check then enter “show running-configuration” command to see […]
Inter-VLAN Communication (Routing) and Extended ACL
Hello everyone, In this example we will create 4 VLANs on a mid-level network infrastructure. Above you can see the logical topology which we created. There is one DHCP server on 192.168.4.10/24 , one SQL-server on 192.168.3.2, four different client hosts and two layer-3 switches. We will use EXTENDED ACL to create some rules on […]
10 Most Used Commands on Cisco OS
#enable This command enables users to enter their commands on the terminal. Moves user to privilege mode. #configure terminal This command allows users to make some changes on the configuration. #show running-configuration This command shows you the latest running configuration on the device. To not to lose your latest configurations which you have done, you […]
Routing between networks / Cisco router configuration
HOW TO ROUTE NETWORKS USING CISCO ROUTERS ? In this example topology, we have 3 different networks. We have 192.168.1.0 network on the left side, 192.168.2.0 on the right side. Also 3rd network is between routers on 192.168.0.0 networks. So we will configure our topology as above. First let’s start with clients; give IP addresses […]