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Roger Perkin

Network Automation Consultant

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Password Recovery Cisco Catalyst 3850

If you are locked out of your 3850 switch and need to perform Password recovery on a Cisco Catalyst 3850 switch this short tutorial will guide you along the way. You will need One Cisco Catalyst 3850 …

How to Upgrade IOS on Cisco 4500X Switch

The post describes the process of how to upgrade the IOS / Software on a Cisco 4500X switch. I will not be covering how to do a hitless upgrade using ISSU with 2 switches in a VSS pair. This process …

Spanning-Tree Portfast – The Definitive Guide

The spanning-tree portfast command is a very simple feature but often mis-understood. In this short post I will explore how this feature behaves, how it works and how to configure it on a cisco …

Private Vlans Explained

Introduction to Private Vlans A normal Vlan is essentially a broadcast domain and all the devices if addressed on the same subnet can communicate with each other. In shared hosting environments, to …

Switchport Host Command

Working through one if the INE workbooks today I discovered a switch command I had never come across before switchport host Normally I would enable spanning-tree portfast on all access ports to ensure …

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