Re: How to correlate MAC and IP addresses

[Andreas <AndreasSander1 () gmx net>]

Am 30.08.2013 07:21, schrieb Martin Visser:
> Wireshark can't really do that, because like beauty, matching MAC to IP is
> in the eye of the beholder ;-)
>
> As a simple example you might have two routers running VRRP or HSRP to
> provide next hop gateway redundancy, as well is ICMP redirect for good
> measure. In this case traffic for one IP address could have multiple MAC
> addresses, depending on whether you look at source or destination. All the
> relationships are valid, and can change over the time of the length of the
> capture. (Even an ARP response is only a point in time in match, and can
> "wrong" at any time afterwards).

MAC addresses for hosts behind routers are not interesting since you can 
only get the routers MAC address. But it would be helpful to get a table 
of MAC/IP addresses for IP addresses in the "local" network.

It would have to be defined what "local" means. Since the PC running 
Wireshark doesn't have to have an IP address in the monitored network 
segment. So this "local network" had to be configurable.

A/

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