Sunday, 9 January 2011

BPDU filter vs BPDU guard

BPDU filtering - prevents the switch interface from sending or receiving BPDUs.

Global BPDU Filter
Switch(config)#spanning-tree portfast bpdufilter default
Interface BPDU Filter
Switch(config-if)#spanning-tree bpdufilter enable | disable

BPDU guard - puts Port Fast-enabled interfaces that receive BPDUs in an error-disabled state.

Global BPDU Guard
Switch(config)#spanning-tree portfast bpduguard default
Interface BPDU Guard
Swith(config-if)#spanning-tree bpduguard enable | disable

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