D-Link DGS-3620-52T-SE-LIC Product Manual - Page 472
Table 0-3 ARP Payload, Table 0-4 Ethernet Frame Format
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xStack® DGS-3620 Series Managed Switch Web UI Reference Guide When the switch receives the frame, it will check the "Source Address" in the Ethernet frame's header. If the address is not in its Forwarding Table, the switch will learn PC A's MAC and the associated port into its Forwarding Table. In addition, when the switch receives the broadcasted ARP request, it will flood the frame to all ports except the source port, port 1 (see Figure 2). Figure 2 Figure 3 When PC B replies to the ARP request, its MAC address will be written into "Target H/W Address" in the ARP payload shown in Table 3. The ARP reply will be then encapsulated into an Ethernet frame again and sent back to the sender. The ARP reply is in a form of Unicast communication. Table 0-3 ARP Payload When PC B replies to the query, the "Destination Address" in the Ethernet frame will be changed to PC A's MAC address. The "Source Address" will be changed to PC B's MAC address (see Table 4). Table 0-4 Ethernet Frame Format 462
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