Attack 3: DoS Using a Flood of Config BPDUs
Closely akin the antecedent attack, this advance continuously generates TCN BPDUs,
forcing the basis arch to accede them. What’s more, all bridges bottomward the timberline see
the TC-ACK bit set and appropriately acclimatize their forwarding table’s timers; this after-effects in a
wider appulse to the switched network. When the TC bit is set in BPDUs, switches adjust
their bridging table’s crumbling timer to forward_delay seconds. The aegis is the aforementioned as
before: BPDU-guard or filtering.