From: Keane, James (James.Keane@agriculture.gov.ie)
Date: Tue Nov 08 2005 - 09:58:57 GMT-3
Basic Spanning Tree Protocol - 802.1D has 5 states
blocking, listening, learning, forwarding and disabled
its well explained at http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/sw_5_5/cnfg_gd/spantree.pdf
Spanning tree is in my opinion the most underrated and overlooked technology used in networking, almost all networks use it yet very few fully understand it ..
Here is an place you can check out spanning tree in all its variants
http://www.cisco.com/en/US/tech/tk389/tk621/tsd_technology_support_protocol_home.html
Rapid Per Vlan Spanning Tree is where most modern devices are at now
so read this document is essiental to get up to speed -
http://www.cisco.com/warp/public/473/146.pdf
A simple question to check out someones understanding of spanning tree ..
How long (without portfast / all defaults configured) will it take a port to transition from blocking to forwarding when a PC (or any device) is plugged in ..
Now you cant really expect to pass your CCIE if you dont know that one !
Regards
James Keane
-----Original Message-----
From: Schulz, Dave [mailto:DSchulz@dpsciences.com]
Sent: 08 November 2005 10:55
To: Qahtani, Mohammed S.(ECC) ; nobody@groupstudy.com;
ccielab@groupstudy.com
Subject: RE: blocking and non-blocking
As it relates to spanning-tree, or, port security?
Dave
-----Original Message-----
From: nobody@groupstudy.com
To: ccielab@groupstudy.com
Sent: 11/8/2005 3:18 AM
Subject: blocking and non-blocking
Hello all,
What is exactly meant by a port is blocking or non-blocking. Is there a
technical paper on this
Thank you,
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