Mac address learning during routing2/18/2023 ![]() ![]() ![]() As a packet travels from the source device to the final destination device, the Layer 3 IP addresses do not change. ![]() For example, PC1 is configured with IPv4 address 192.168.1.10 and an example MAC address of 0A-10. If the router finds a path to the destination, it encapsulates the Layer 3 packet into a new Layer 2 frame and forwards the frame out the exit interface.Īs shown in Figure 1-23, devices have Layer 3 IPv4 addresses, and Ethernet interfaces have Layer 2 data link addresses. Examines the destination IP address of the IP packet to find the best path in the routing table. De-encapsulates the Layer 2 frame header and trailer to expose the Layer 3 packet. The router performs the following three major steps: Figure 1-23 Encapsulating and De-Encapsulating Packets ![]()
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