Sometimes You need to list MAC addresses loged on host’s vSwitches to eliminate VM’s MAC address duplicates.

1. Create a shell script:

vi mac_address_list.sh

2. Copy and past the code listed below:

#!/bin/sh
#vmrale
for VSWITCH in `vsish -e ls /net/portsets/ | cut -c 1-8`
do
        echo $VSWITCH
        for PORT in `vsish -e ls /net/portsets/$VSWITCH/ports | cut -c 1-8`
        do
                CLIENT_NAME=`vsish -e get /net/portsets/$VSWITCH/ports/$PORT/status | grep clientName | uniq`
                ADDRESS=`vsish -e get /net/portsets/$VSWITCH/ports/$PORT/status | grep unicastAdd | uniq`
                echo -e "\t$PORT\t$CLIENT_NAME\t$ADDRESS"
        done
done        

3. Change the file’s permissions

chmod 755 mac_address_list.sh

4. Run the script

./mac_address_list.sh

Simple, but useful!

… but this is not the only one possible method