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How stp BPDU communicate between cst,pvst and mst spanning tree mode

Hi,

i am facing pvid inconsistancy and type inconsistancy problem in my network.

network connectivity

Sw1----------------Sw2--------------Sw3

sw1 is cisco siwtch(spanning tree mode pvst+)

sw2 is extreme switch(spanning tree mode is CST,it is work on cst only)

Sw3 is cisco (spanning tree mode pvst+)

3 REPLIES
Cisco Employee

Re: How stp BPDU communicate between cst,pvst and mst spanning t

Hello friend,

Please see this link below, this will help you:

http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00801d11a0.shtml#topic1

HTH,Please rate if it does.

-amit singh

Re: How stp BPDU communicate between cst,pvst and mst spanning t

Make sure you are using the same native vlan on the link between Sw1/Sw2 and Sw2/Sw3.

Else, run MST on sw1 and sw3.

Regards,

Francois

Re: How stp BPDU communicate between cst,pvst and mst spanning t

Oh, my previous email was for the pvid inconsistency. Make also sure that you're trunking on those two links;-)

If this still does not help, please, tell us exactly what inconsistency message you get, on which port, and the trunking configuration of the different ports involved.

F.

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