STP functionality

Answered Question
Oct 31st, 2007
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Hi everybody,

only a doubt about STP (802.1d).


Suppose to have a simple loop between three switches (in purely daisy chain).

What if one of them (say SWA) doesn't support STP?

Can I use STP nevertheless ?

The other two switch are able to manage the port block/forwarding algorithm, so mantaining connectivity without looping ?


Thank you in advance

Correct Answer by Kevin Dorrell about 9 years 5 months ago

It depends on whether the third-party switch passes the BPDUs through transparently. If it does so, the STP will block a port to prevent the loop. It would be as if you had a crossed-cable instead of the third-party switch.


If it doesn't, then the network will meltdown.


Kevin Dorrell

Luxembourg


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Correct Answer
Kevin Dorrell Wed, 10/31/2007 - 05:17
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It depends on whether the third-party switch passes the BPDUs through transparently. If it does so, the STP will block a port to prevent the loop. It would be as if you had a crossed-cable instead of the third-party switch.


If it doesn't, then the network will meltdown.


Kevin Dorrell

Luxembourg


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