Three switch chained together physically to form a loop network as this:A(1/1)-B(1/1)B(1/2)-C(1/2)C(1/1)-A(1-2). A(1/2)is in block mode and C is root bridge.
1.)Will A(1/2) receive BPDU from C? My understand is after convergence BPDU is always sent from root bridge to the down stream's root port, and so on.So will A(1/2) receive BPDU?
2) If link between B(1/2)-C(1/2) goes down, after 20ms(maxage), A goes into listening mode.Will A send BPDU trying to announce itself is a root bridge? Obiously C is still root bridge this moment.If A(1/2) was receiving BPDU via the blocked port all the time then I think A should not send BPDU. I am reading the Cisco LAN switch book(Kevin hammilton), however at this point I am a little bit lost.Thanks a lot.