obtain ip connected to an interface

[ccrespoh]

Hello,

In a catalyst 6500 series we can know the mac of the machines connected to a port, but, can we know the ip of the machine?

Thanks in advance

[peterledwidge]

Hi,

you could - ping the subnet broadcast address

sh ip arp and match them up in this way.

you could then add a des to each int if the addresses don't change etween ports.

HTH

[peterledwidge]

des = description :)

[ccrespoh]

Hi,

Doesn't exist any command to do it? Well, you have the interface and it will be enough to sniffer to know the source address of the packets incoming from that interface.

To ping the broadcast address... Imagine a 255.255.248.0 network.... It will be a ping storm.

[Keyan]

Once you have the mac you will need to do a sh arp | inc from the router for the subnet.