cisco layer 2 switches

not quite direct

show mac address-table 

Select allOpen in new window

this will list all of the MAC addresses that the switch knows, it can be "filtered" by adding a specific port or vlan.

you could then do a "show arp" on the gateway device to correlate between the MAC address and an IP address.

if the switch is running CDP and the connected device is also running CDP, then you could do

show cdp neighbors detail 

Select allOpen in new window

this could be further filtered by adding a pipe "|" and the ususal filters

With L3 you can, but with L2 i am not sure, but if you have a L2 switch, give it a try

========
show mac address-table | include f2/28 (switchport)

output:
10 0002.a534.8ff5 dynamic ip f2/28

sh arp | include 0002.a534.8ff5

result:
Internet 10.1.185.251 0 0002.a534.8ff5 ARPA Vlan10
========

You may turn on DHCP snooping on newer L2 switches. Of course, that won't give much info for static addresses.

Tamas

thanks all of your comments, but still i am not able to get the port against mac address.

i also try to find the mac address of my computer in the switch where is my Pc connected.

i give the below  command

# show mac address-table

and copy the result in text file and then try to search mine own computer mac adress in the table but i don't find. Why the switch mac address table don't show my computer mac-address ???

can u paste the output or attach text file here from "sh mac address-table"
and ur MAC address.
Possibilities are there when u have multiple adapter/wireless adapter MAC address you might have searched for different MAC.

great