From: Alex R (alex@deviousmeans.net)
Date: Sat Jan 15 2005 - 05:06:34 EST
> Correct me if I am wrong, but, I understand that the MAC address is
> left unchanged and can be used to identify the source.
>
The MAC address is only used on the local LAN in a way. When I send a packet
to my default gateway it strips the frame off and adds its own other frame
for the next network type. So let's say the network is like this:
Host A ---> Ethernet LAN ---> router A ---> Frame Relay ----> router B --->
Ethernet LAN ---> host B
If host A sends a packet to host B the destination MAC address is the MAC
address of router A for its Ethernet interface. When host B receives the
packet the source MAC address will be the one of router B's Ethernet
interface.
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