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1920 switches MSTP

 
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16again
Respected Contributor

Re: 1920 switches MSTP

The core switch should sent out broadcasts to both fibers.  On the access switch, one receiving port is in STP-block mode, this is where packets are discarded

Dunky
Regular Advisor

Re: 1920 switches MSTP

Sorry, I meant broadcasts from a client patched to one of the edge switches.

16again
Respected Contributor

Re: 1920 switches MSTP

The edge switch shouldn't send out broadcast on its blocked port.  However, the broadcast sent on its forwarding fiber is copied by the core switch to all it's interfaces , so it also ends up on the fiber with blocked port.