One of the best switch reference investments you will make is if you buy a copy of cisco lan switching by clark and hamilton.
pvst allows multiple instances of SPT within a switched network, ie. 1 STP per vlan. dot1Q allowed only 1 instance of SPT. and of course they have different framing definitions. so we have an interoperability problem here with different vendors, codes releases, etc. (cant remember when pvst+ was introduced to the catalysts). PVST+ allows the 2 different implementations to interoperate (tunnelling pvst frames over pvst+ [i think if memory serves me correct - but its 2am and im too tired]). by doing this you can have eg. isl and dot1Q trunks within the same switched topology. there have since been forward developments with dot1Q, called dot1s (is it called dot1S yet?) which is like an "upgrade" to dot1Q. and now you have MISTP, RSTP, dot1w, etc, etc.. its all hard to keep up :-) but yes, go buy yourself a copy of the mentioned book. hth, Mark. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Monday, January 06, 2003 5:30 AM To: [EMAIL PROTECTED] Subject: PVST vs PVST+ [7:60419] Anyone know what the differences are between the two? And where this may be documented? Many thx indeed ________________________________________________________________ Ken Farrington Global Networks, Barclays Capital, 5 The North Colonnade, Canary Wharf, London, E14 4BB * Tel : 020 7773 3550 * Mob : 07768-866655 * [EMAIL PROTECTED] ------------------------------------------------------------------------ For more information about Barclays Capital, please visit our web site at http://www.barcap.com. Internet communications are not secure and therefore the Barclays Group does not accept legal responsibility for the contents of this message. Although the Barclays Group operates anti-virus programmes, it does not accept responsibility for any damage whatsoever that is caused by viruses being passed. Any views or opinions presented are solely those of the author and do not necessarily represent those of the Barclays Group. Replies to this email may be monitored by the Barclays Group for operational or business reasons. ------------------------------------------------------------------------ Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=60425&t=60419 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
