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New Member

STP Version

Is there version numbers for STP.

If so, is there any documentation.

Regards,

Mudassir Ali

3 REPLIES
New Member

Re: STP Version

to my knowledge there is just 802.1d

Cisco Employee

Re: STP Version

802.1d--Per VLAN STP

802.1s/802.1w--Multiple STP/Rapid STP

The following page should help

http://www.cisco.com/warp/public/473/#SpanningTree

New Member

Re: STP Version

There are various versions of spanning tree protocol, including IEEE, DEC and IBM variants. The one you are most likely to come across these days is IEEE's 802.1D 1998 version, but that has changed over the years. The current standard is at

http://standards.ieee.org/getieee802/download/802.1D-1998.pdf

As mudassir states, this is augmented by other IEEE 802.1 standards, including 802.1w Rapid Spanning Tree available at

http://standards.ieee.org/getieee802/download/802.1w-2001.pdf

and 802.1s Multiple Spanning Tree (not available for free download as far as I can tell - let me know if you know otherwise!).

Hope this helps

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