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Forum Replies

  1. Hi Rene,

    I am not clear about the root bridge. I mean why are we finding the root port(for non-root bridge) to reach the root bridge. Is it like in practical scenario, the root bridge is set as destination to one of the server?

  2. Hi Rene,

    I have a question to the description on the third topology. You say:

    “SW3 will receive BPDUs on its 10 Mbit interface (cost 100) and on its 1000 Mbit interface (cost 4). It will use its 1000 Mbit interface as its root port.”

    Should SW3 receive on 10Mbit interface BPDUs of 0 instead of 100 because they are generated by the root? And then SW3 add its port cost of 100 and send it to SW4 and SW5?

    Is it correct that the BPDU sending SW don’t add the costs of the outgoing interface/link, only the links that left behind? So the receiving SW has to add the co

    ... Continue reading in our forum

  3. Hello Laz,
    I have one question and I am going to use the below topology.

    SWITCH_1=================SWITHC_2

    FA0/11-------------------------------------FA0/1
    FA0/22------------------------------------FA0/2

    In this scenario, I have switch 1 connected to switch 2 through two Fast Ethernet links as it is drawn above. Switch 1 is the root bridge. Switch 2 has to pick one link between fa0/1 and fa0/2 links as the root port and block another one. Therefore, Switch 1 will look at the cost of fa0/1 and fa0/2 links and they both are the same which is 19. Now Switch 1 wi

    ... Continue reading in our forum

  4. Hello Azm

    In the scenario that you describe above, Fa0/2 will always be blocked and Fa0/1 will always be forwarding because Fa0/1 is lower than Fa0/2. Even if you change the port priority to 16 or anything else for that matter, the lower port will always be chosen as forwarding in the above scenario. Changing the port priority parameter will not change this order.

    The port priority is only used to determine which end of a link between two NON-ROOT switches will be DESIGNATED and which will be BLOCKED.

    I hope this has been helpful!

    Laz

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