05-02-2008 03:01 AM - edited 03-05-2019 10:44 PM
Hello,
I am trying to understand all the spanning-tree options but they are difficult to classify.
For all of the following: CST, MST, PVST, PVST +, MISTP, are these options part of the STP or RSTP protocol or both?
Do you know the difference between PVST and PVST +? And I found nothing on CST ou MISTP mode? Do you know some?
Thank you
05-02-2008 03:10 AM
Claude
This is how i understand it.
CST = Common Spanning Tree ie. you have one spanning tree instance for the whole switch network regardless of how many vlans there are.
PVST = Per vlan Spanning Tree. Unlike CST each vlan can run it's own instance of Spanning-tree. PVST is used on ISL trunks.
PVST+ same as PVST but for 802.1q trunks.
RSTP - an improvement on STP that incorporated many of the proprietary features that Cisco had with normal STP ie. uplinkfast, backbonefast.
MST = MISTP - MST uses RSTP but allows you to group a number of vlans to one spannning-tree instance.
Jon
05-02-2008 03:13 AM
Thanks a lot.
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: