You must know your host IP.
Then you hit below command in your Cat S/W.
South-Korea#sh mac-address-table
Mac Address Table
------------------------------------------
Vlan Mac Address Type Ports
---- ----------- ---- -----
20 0003.250c.d7e3 DYNAMIC Gi0/1
20 0003.3bf7.0b9e DYNAMIC Gi0/1
20 0007.eb98.0309 DYNAMIC Gi0/1
20 000b.6a28.9f1e DYNAMIC Gi0/1
20 000b.6a5e.29f2 DYNAMIC Fa0/24
20 000b.be98.9f40 DYNAMIC Fa0/24
20 000b.be98.9f41 DYNAMIC Fa0/24
20 000b.befd.b63f DYNAMIC Gi0/1
20 000d.6191.25ac DYNAMIC Gi0/1
20 000e.2e01.7542 DYNAMIC Gi0/1
20 000e.2e37.969b DYNAMIC Gi0/1
20 0010.a4c7.efd3 DYNAMIC Gi0/1
20 0010.a722.da34 DYNAMIC Gi0/1
20 0040.2b26.e74f DYNAMIC Gi0/1
20 0040.f4c8.f0ae DYNAMIC Gi0/1
20 0050.22a0.77e1 DYNAMIC Fa0/1
20 0050.70f5.4842 DYNAMIC Gi0/1
20 0050.8bad.ec37 DYNAMIC Fa0/23
20 0050.8d4e.4d5a DYNAMIC Gi0/1
20 0090.0803.0e77 DYNAMIC Gi0/1
20 0090.08a1.ace9 DYNAMIC Gi0/1
20 00e0.4cc4.1a29 DYNAMIC Gi0/1
20 a000.0004.13dc DYNAMIC Gi0/1
Total Mac Addresses for this criterion: 23
South-Korea#sh arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 211.175.216.167 0 00a0.b002.d67c ARPA Vlan20
Internet 211.175.216.234 0 0003.3bf7.0b9e ARPA Vlan20
Internet 211.175.216.235 0 00e0.4cc6.4046 ARPA Vlan20
Internet 211.175.216.5 9 000b.bedc.7d80 ARPA Vlan20
Internet 211.175.216.1 0 000b.befd.b63f ARPA Vlan20
Internet 211.175.216.3 179 000b.befd.b5bf ARPA Vlan20
Internet 211.175.216.13 34 000b.beb0.d180 ARPA Vlan20
Internet 211.175.216.20 - 000b.bed1.c780 ARPA Vlan20
Internet 211.175.216.31 1 0011.2557.ccec ARPA Vlan20
Internet 211.175.216.105 0 0003.250c.d7e3 ARPA Vlan20
South-Korea#
