list ip addresses seen on each port

[lcaruso]

Hi,

On a 3750 running 12.2(55) is there a command or a series of commands that will let me see which ip addresses are seen on each port?

sh ip arp just shows the vlan ip addresses are seen from, but I need to correlate ip addresses to port numbers for directly connected hosts.

Any help surely is appreciated. Thanks.

Also what commands are needed to turn on snmp so a switch port mapper application can provide this information?

[Jon Marshall · Accepted solution]

You need to us the mac-addresses ie. show the mac-address table which will show the mac to port mapping and then use arp to match the mac-address to the IP.

Note if the 3750 is acting as L3 switch this will work fine. If it is a L2 switch then you need to look at the arp table on the L3 device responsible for the inter-vlan routing.

Jon