Cisco IP/MAC/Port

1. IP → Port ?

1.1 10.10.30.254(CoreSwitch):

show ip arp | include 10.10.122.29

Internet  10.10.122.29           96   9890.96d0.0c0a  ARPA   Vlan122

show mac address-table address 9890.96d0.0c0a

Displaying entries from DFC switch [1] linecard [1]:

     vlan   mac address    type   learn    age                 ports
----+----+---------------+-------+-----+----------+-----------------------------
      122 9890.96d0.0c0a  dynamic  Yes       90     Po36

show cdp neighbors Po36

Device ID        Local Intrfce     Holdtme    Capability  Platform  Port ID
CIM-1B4F-R5-C2960XR-01
                 Gig 2/1/36        130              S I   WS-C2960X Gig 1/0/52
CIM-1B4F-R5-C2960XR-01
                 Gig 1/1/36        130              S I   WS-C2960X Gig 1/0/51

show cdp entry * protocol

Protocol information for CIM-1B4F-R5-C2960XR-01 :
  IP address: 10.10.30.113
Protocol information for CIM-1B4F-R5-C2960XR-01 :
  IP address: 10.10.30.113

1.2 10.10.30.113:

show mac address-table address 9890.96d0.0c0a

          Mac Address Table
-------------------------------------------

Vlan    Mac Address       Type        Ports

----    -----------       --------    -----

 122    9890.96d0.0c0a    DYNAMIC     Gi1/0/29
Total Mac Addresses for this criterion: 1

show cdp neighbors Gi1/0/29

Notes: None, proving that the mac-address is the port Gi1/0/29 from the switch.

2. MAC→IP ?

10.10.30.254(CoreSwitch):
show ip arp | include 9890.96d0.0c0a

Internet  10.10.122.29          136   9890.96d0.0c0a  ARPA   Vlan122

3. MAC→Port ?

10.10.30.254(CoreSwitch):
show mac address-table | include 9890.96d0.0c0a

      122 9890.96d0.0c0a  dynamic  Yes       80     Po36