MAC address of device on port

[wmurray]

What command or commands will give me the MAC address of the device that is plugged into a particular port on a switch?

[syntaxmonster]

Try this:

sh mac-address-table | include

[lanbrown]

IOS or CatOS?

[dagyb]

OR

sho cam dynamic

[ToddWarren]

SHOW MAC-ADD INT G2/1, for example, in IOS on gigabit port 2/1. Really helps us to help you if you can provide the OS.

[ccube]

You can also solicit this information from the device using SNMP from this structure:

.1.3.6.1.2.1.17.4.3

+--dot1dTpFdbEntry(1) detail

|

+-- -R-- String dot1dTpFdbAddress(1)

| Textual Convention: MacAddress

| Size: 6

+-- -R-- Integer dot1dTpFdbPort(2)

+-- -R-- EnumVal dot1dTpFdbStatus(3)

| Values: other(1), invalid(2), learned(3), self(4), mgmt(5)

These will index back to ifIndex which you can use to get the port description from ifDescr. Both of these values come from the ifEntry table.