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MSTP vs MISTP vs 802.1s

I am trying to decipher what each of these are. My understanding is that one of them is a cisco proprietary version of STP, and that 802.1s is a standardized version that opperates similar to the cisco one, but the descriptions and whether is MST MSTP or MISTP seem to be unclear. Anyone have any clarity to offer???

thanks

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Re: MSTP vs MISTP vs 802.1s

MISTP allows you to group multiple VLANs under a single instance of spanning tree (a MISTP instance). MISTP combines the Layer 2 load-balancing benefits of PVST+ with the lower CPU load of IEEE 802.1Q.

http://www.cisco.com/en/US/docs/switches/lan/catalyst4000/7.4/configuration/guide/spantree.html#wp1138155

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