(As shown in the figure,SW1 and SW2 use asymmetric IRB forwarding, and PC1 and PC2...

Comprehensive and Detailed 200 to 250 words of Explanation From HCIP Datacom Campus Network documents knowledge without any URL or Links:

In anasymmetric IRB (Integrated Routing and Bridging)VXLAN forwarding model, Layer 2 forwarding and Layer 3 routing occur ondifferent VTEPs. When PC1 sends traffic to PC2, the packet is first forwarded to thelocal gateway (VBDIF interface)on VTEP1 for Layer 3 routing.

After routing is performed, VTEP1 encapsulates the packet into a VXLAN packet and forwards it to VTEP2. Importantly, theoriginal data frame inside the VXLAN packethas already been rewritten after routing. The destination MAC address in the original Ethernet frame is no longer the MAC address of PC2, but theMAC address of the next-hop gateway on the remote VTEP.

In the figure, this next-hop MAC address isMAC C, which belongs to the VBDIF interface on VTEP2. MAC D (PC2’s MAC address) is only used after the packet is decapsulated and forwarded locally by VTEP2.

According to HCIP Datacom Campus Network VXLAN forwarding behavior, the correct destination MAC address of the original data frame sent from VTEP1 to VTEP2 isMAC C, making optionCcorrect.