Tag: Layer2


Spanning Tree Protocol (STP) was created to allow for loop-free topologies in switch architectures.  Prior to STP,  any switch architecture that had a loop would end up with duplicate frames flooding between switches causing an outage.  Radia Perlman’s algorithm resolved the physical loop by creating a logical blocking solution stopping ... Read More
January 11, 2014Praveen Bahethi


We are going to show how VLANs are created in VTP server and propagated to other switches and how to stop the propagation, if required. The switches are in a triangle with switchA as root of the STP and configured with hostnames and ip addresses allowing us to remotely access them ... Read More
January 10, 2014Praveen Bahethi


VLANs are used to create separate groupings of devices.  Prior to VLANs, all the devices had to be on the same switch -  users, printers and servers needed to be together had to be physically colocated.  Most often VLANs were used to separate departments, but than can be used geographically. Acme ... Read More
January 7, 2014Praveen Bahethi


MAC Address stands for Media Access Control Address. It is an unique identifier which is brunt in on Network Interfaces Cards (NIC) and being used for host identification and communication between multiple hosts on a Local Area Network (LAN). MAC addresses live at Layer 2 of the OSI Model. MAC is also ... Read More
January 3, 2014Praveen Bahethi