Refer to the exhibit. How are the STP BPDUs forwarded over Cisco ACI fabric?

The correct answer is D. STP BPDUs that are generated by Switch1 are received only by Switch3. ACI floods STP Bridge Protocol Data Units (BPDUs) to the VXLAN network identifier (VNID) assigned to the FD VLAN. VNID is assigned through the VLAN pool so encapsulation has to be part of same VLAN pool to be in part of same STP domain…

Traditional Network with ACI

Question

Exhibit

Options

ASTP BPDUs that are generated by Switch2 are received by Switch1 and Switch3.
BCisco ACI fabric drops all STP BPDUs that are generated by the external switches.
CCisco ACI acts as the STP root for all three external switches.
DSTP BPDUs that are generated by Switch1 are received only by Switch3.

How the community answered

(30 responses)

A
10% (3)
B
3% (1)
C
7% (2)
D
80% (24)

Explanation

ACI floods STP Bridge Protocol Data Units (BPDUs) to the VXLAN network identifier (VNID) assigned to the FD VLAN. VNID is assigned through the VLAN pool so encapsulation has to be part of same VLAN pool to be in part of same STP domain. https://aci-troubleshooting-lab.readthedocs.io/en/latest/epg.html

Topics

#STP BPDUs#external switch forwarding#ACI fabric#BPDU behavior

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