Which command prevents all access ports on a switch from sending or receiving BPDUs?
A. spanning-tree bpdufilter default
B. spanning-tree bpdufilter enable
C. spanning-tree portfast bpdufilter default
D. spanning-tree portfast bpduguard default
Which command prevents all access ports on a switch from sending or receiving BPDUs?
C https://www.cisco.com/c/m/en_us/techdoc/dc/reference/cli/nxos/commands/l2/spanning-tree-bpdufilter.html
After thinking a bit, I can say that option C may be correct. To be honest it’s poorly worded question.
Because command spanning-tree portfast bpdufilter default prevent all PORTFAST-PORTS (not all access-ports) from sending and receving BPDUs.
Iny my opinion the correct answer should be B.
Command (spanning-tree portfast bpdufilter default) behaves not as you might think. It prevent PortFast ports from sending BPDUs, however when port with Portfast is receiving BPDU’s, it will automatically disable PortFast ports and convert to normal port. So basically, it does not prevent access from receving BPDUs.
Command (spanning-tree bpdufilter enable) prevent access port from receiving and sending BPDUs, which effectively turns off Spanning-Tree Protocol on that port.