Refer to the exhibit.
You are verifying connectivity within a leaf device. You attempt to connect to a destination server in VLAN 17, and you then run the show mac address-table command as shown. Why does the show mac address-table output show a different VLAN?
A. The wrong AEP is attached to the leaf ports.
B. The VLAN configuration on the leaf switch is incorrect.
C. The VLAN ID shown is used for identification and internal mapping within the ACI leaf.
D. When traffic appears, the Cisco ACI marks ports with VLAN 17.
Answer is C:
FD_VLAN
Flood domain VLAN. The FD-VLAN is the forwarding VLAN used to forward traffic on the Broadcom ASIC. The FD_VLAN is directly linked to the ACCESS_ENC and is also referred to as the internal VLAN. The FD_VLAN is used to represent the ACCESS_ENC instead of linking it directly to the BD_VLAN. The FD_VLAN allows the BD_VLAN to link to different ACCESS_ENCs and treat all of them as if they were all in the same 802.1Q VLAN on a NX-OS switch. When a broadcast packet comes into the leaf switch from the ACI fabric, the BD_VLAN can map to several FD_VLANs to allow the packet to be forwarded out different ports using different ACCESS_ENCs. The FD_VLAN is used to learn Layer 2 MAC addresses.
I think the correct answer is C.
If you assign vlan-17 then each leaf switch changes locally to another vlan id.