show mac address-table address
command. You can view all of the entries in the MAC address table
with the command show mac address-table, but if you know the
MAC address of the relevant system and only wish to determine the port on
the switch to which it connects, you can specify its MAC address with the
command show mac address-table address followed by the 48-bit
MAC address, which can be in the form xx.xx.xx.xx.xx.xx
or xxxx.xxxx.xxxx .
Saturn>show mac address-table address 50:e5:49:d8:13:37
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
1 50e5.49d8.1337 DYNAMIC Fa0/19
Total Mac Addresses for this criterion: 1
Saturn>With the port number, you can determine details for the interface to which
the system connects using a show interfaces port where
port is the port identified by the show mac address-table address
command.
Saturn>show interfaces Fa0/19
FastEthernet0/19 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 0009.e897.d293 (bia 0009.e897.d293)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, media type is 100BaseTX
input flow-control is unsupported output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:05:39, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1322485 packets input, 794024170 bytes, 0 no buffer
Received 3229 broadcasts (2334 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 2334 multicast, 0 pause input
0 input packets with dribble condition detected
1316400 packets output, 587905740 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
Saturn>