User Manual

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch CLI Reference Guide
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Figure 6 - 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
Figure 7).
Figure 7 - Ethernet Frame Format
The switch will also examine the “Source Address” of the Ethernet frame and find that the address
is not in the Forwarding Table. The switch will learn PC B’s MAC and update its Forwarding Table.
Figure 8 – Forwarding Table
Figure 9 – Connection Established