difference between 802.1d stp and cst

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Sep 2nd, 2008
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hi every body!

I am just confused about the difference between 802.1d stp and cst. Are they same?

thanks a lot!

Correct Answer by Jon Marshall about 8 years 9 months ago

Sarah


802.1d is the IEEE spanning-tree algorithm that prevents loops in a layer 2 network.


CST is an implmentation of 802.1d where there is only one instance of STP running for all the vlans in your layer 2 network no matter how many vlans that is.


PVST/PVST+ is an implementation of 802.1d where each vlan runs it's own instance of STP.


Jon



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Correct Answer
Jon Marshall Wed, 09/03/2008 - 01:16
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Sarah


802.1d is the IEEE spanning-tree algorithm that prevents loops in a layer 2 network.


CST is an implmentation of 802.1d where there is only one instance of STP running for all the vlans in your layer 2 network no matter how many vlans that is.


PVST/PVST+ is an implementation of 802.1d where each vlan runs it's own instance of STP.


Jon



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