switch>enable
switch#show mac address-table
you will see the mac-address of each pc connecting to the switch & the port
save the mac-address and then type
switch#show ip arp
match the mac-address you got from the previous step to the ip-address listed here
note : the pc you to know its ip must make any connection with any pc in the lan
so that the switch can get the ip from the mac
thanx
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