08-09-2019 09:14 PM
Hello experts,
I just finished my CCNA course and try to dig more about STP. I have some questions may need your help. Thanks.
1.) Does a switch keep sending BPDU(7 times because send Hello every 2 seconds and listening state remains for 15 seconds) during whole listening state even if it has known itself not a root switch?
2.) What is exactly the BPDU propagated? For example, given a topology below
2.1) Does A generate 2 different BPDU? (one with port id "eth1/1" and the other one with port id"eth1/2")?
2.2) If so, will C/D/E receive two different BPDU of A?
2.3) Assume A is the root switch, and D is also aware of that. How does D know the cost to root switch and put it into BPDU?
Solved! Go to Solution.
08-24-2019 06:51 PM
08-24-2019 08:09 PM
Hi Martin,
It sounds good and reasonable. Thanks for your full support.
08-25-2019 05:40 AM - edited 08-25-2019 09:48 PM
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