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MSTP BPDU

Hi

Im in little struggle to understand the MSTP BPDU please help someone.

1)what is the difference between Bridge ID and CIST Bridge ID ? (i saw in wireshark, i have attached below)

2)when non CIST regional root bridge sends a BPDU to STP or some other region, what is the Bridge ID which include ? (CIST regional root MAC or Its own MAC )

3)can we separate IST root and CIST root ? 

 

please suggest me any you tube videos to understand MSTP inter operating with others that would be very helpful.

thanks in advance.

MST bpdu.png

1 REPLY 1
Rising star

Re: MSTP BPDU

look at this post

see the diagrams and section "IST, CIST, and CST Overview"

it also refers to Understanding Multiple Spanning Tree Protocol (802.1s). from Cisco with explanation of terms

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