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BPDU Query

Unanswered Question
Nov 1st, 2006
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We recently ordered 3 x Cisco 3560 Switches. The main reason we bought these switches was to do some MSTP

interworking between our own Layer 2 equipment and these Cisco switches.

However, the Cisco switches do not follow the BPDU format described in

802.1s (MSTP). Does anyone have any ideas how to resolve this.

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gpulos Wed, 11/01/2006 - 09:37
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what version of IOS are you running?


ciscos implementation of MST with IOS 12.2(25)SEC is based on the ieee 802.1s standard.


cisco implementations of MST on previous IOS versions are 'prestandard'.


perhaps you should consider upgrading your IOS to 12.2(25)SEC or higher.


please see the following link for more info:

http://www.cisco.com/en/US/products/hw/switches/ps5528/products_configuration_guide_chapter09186a00805b57c1.html#wp1002608

minefujiko Thu, 01/18/2007 - 00:17
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I have SEB swich and SEC swich,which configured MST.

if connected all togther,The MST will work without any problems ?

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