The source mac is already in the frame... normally it is not the source mac
of the original sending station (as that changes with each hop) but rather
the source mac of the previous layer two connection. Remember the souce mac
changes with each hop, the source ip stays the same...
""Wilson, Christian"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> When an icmp echo is sent, or when a telnet connection is intiated, does
the
> destination PC gleen the source mac address from the echo packet/ telnet
> initiation packet, or is an ARP request issued to derive the source mac?
I
> am trying to find out if setting up a static arp entry on a switch would
> prevent someone from spoofing an allowed IP address in an ip permit list
on
> a 6509. Any help would be greatly appreciated.
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