Hi
If the Layer 3 is configure on the switch, you can find the IP by using the comando "show ip arp". But, switches usually does not have Layer 3, then, you need to look at your Layer 3 device (router or Switch Core).
What you can do is find the mac address on the switch by using the commando "show mac address table". This command may vary depending on the switch model and version but you can use exclamation mark in order to guide on the command.
