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NAT and PAT: a complete explanation
Network address translation (NAT) is the process of modifying IP address information in IP packet headers while in transit across a traffic routing device.
There...
How to trace MAC address
Traceroute is a tool for measuring the route path and transit times of packets across an Internet Protocol (IP) network.
Traceroute sends a sequence of...
StackWise Virtual on Catalyst 9500
During the Cisco Live 2016 in Las Vegas, Cisco presented the new feature named "StackWise virtual" supported by the IOS XE Denali in the...
Using NPS to manage Cisco devices
In a a previous article, I illustated how to configure Radius server on Cisco switch/router. In this tutorial, I explain how to install and...
How to log everything with SecureCRT
Unlike my technical articles about configurations, protocols and so on, in this tutorial I will explain how to log automatically all SecureCRT sessions. For those...
How to upgrade a Cisco stack
One of the task of a good Network engineer is to update the Cisco IOS to avoid bugs and to have new features; but...
802.1X Deployment Guide: Global configuration
In the previous article, I illustrated what are the dot1x and the benefits related to it. Just to remember that 802.1X authentication involves three...
How to schedule a reload
Not everyone knows that the reload command permits to schedule a reboot system; for instance, to plan a night router restart or during a...
Upgrade Catalyst 9000 series
In the past, upgrade a switch was very easy: upload the IOS file (a .bin file), change the bootvar and reload the switch; then...
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