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Funzioni <strong>di</strong> STP (2)Ciò viene fatto tramite lo scambio <strong>di</strong> opportune PDU:le Bridge Protocol Data Unit (BPDU)Con le BPDU i bridge si scambiano informazioni circa iBID e i costi dei <strong>di</strong>versi pathLe BPDU sono scambiate <strong>di</strong> default ogni 2 secon<strong>di</strong>I bridge trasmettono i frame BPDU usando come source addressil MAC address della porta e come destination address unmulticast address specifico <strong>di</strong> STP e cioè 01:80:C2:00:00:00<strong>Università</strong><strong>di</strong> <strong>Palermo</strong><strong>VLAN</strong> 38LA
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