Indeed I misspoke... as wan interfaces do not have mac addresses it does not
necessarily change each time a layer two connection changes, although it
could, depending on the topology and protocols in use...
""Peter Slow"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> no it doesnt.
>
> In fact under general circumstances those source macs are the MAC of the
> router that was the last hop onto the lan.
>
> Although i would love to, at the moment i dont have time to explain where
> arp is used and how it works =)
>
> Now, im guessing this 6509 has an MSFC (or MSFC2) am i correct?
> If so it might be a bit easier to do what you want, cause ou are looking
at
> IP addresses, in general, and i'm just making sure before going ahead and
> giving guideance that you have that stuff =)
>
> Don't take this post personally.
>
> -humboldt
>
> -----Original Message-----
> From: Wilson, Christian [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, August 23, 2001 11:18 AM
> To: [EMAIL PROTECTED]
> Subject: Relpys to a request [7:16980]
>
>
> 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.
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=17007&t=16980
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