Below is a short overview of STP and how to navigate it in the CISCO IOS enjoy.
[youtube=http://www.youtube.com/watch?v=zapAZRP7mEk&w=560&h=315]
STP Overview Video
December 12, 2013
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IOS Commands, Networking, Protocols, Switches, Videos | Tagged: 802.1w, blocking port, ccent, ccent exam, ccent study, ccna, cisco icnd2, cisco packet tracer, designated port, fast ethernet, GNS3, icnd1 study, icnd2, icnd2 exam, interface cost, Microsegmentation, packet racer, root bridge, stp, stp overview, stp port roles, testking | 
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Posted by Josh Gahan
Spanning Tree Protocol Port Roles
October 1, 2013The diagram below is the network in use:
Switch 3
FA0/1 – DP
FA1/1 – DP
Switch 1
FA1/1 – RP
FA0/1 DP
Switch 2
FA1/1 – RP
FA0/1 – DP
Switch 0
FA0/1 – RP
FA1/1 – ALTN
The lab for this example can be downloaded by clicking here
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Posted by Josh Gahan
Benefits of Switching
May 31, 2013- Switch ports connected to a single device and microsegment the LAN, providing dedicated bandwidth to that single device.
- Switches allow multiple simultaneous conversations between devices on different ports
- Switch ports connected to a single device support full duplex, in effect doubling the amount of bandwidth available to the device.
- Switches support rate adaptation, which means that devices that use different ethernet speeds can communicate through the switch (HUBS CANNOT)
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Posted by Josh Gahan
Introduction to VLANS
April 27, 2013A continuous generation of broadcasts on a network is called a broadcast storm, this will use the switches resources to the point of breakdown.
By default a switch is setup to use one broadcast domain, to mitigate this, creating more broadcast domains via creating new VLANS, Cisco switches are out of the box configured using VLAN1 named default.
Segmenting the networking by creating a new VLAN , only those hosts on the same VLAN will be able to communicate,connectivity to another VLAN is not possible without the implementation of a L3 device (eg Router)
Read more from Wikipedia on VLANS here
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Posted by Josh Gahan
Microsegmentation
November 5, 2012Microsegmentation is a term used by Cisco when they are talking about one host with one collision domain. Which is what happens when you connect a host to a switch port.
Does anyone want pictures as well … ?
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Posted by Josh Gahan