I want to ping a known MAC address, I tried to use nmap:
sudo nmap -sP 192.168.15.1/24 | grep 20:64:32:3F:B1:A9
But in this case its ping all the 255 IP address (from 192.168.15.1 to 192.168.15.255) until get my MAC address, and that take a long time about 4 sec.!
any idea please?
The only way to make it faster is to test if the mac address is already into your arp table
#!/bin/bash
# extract ip from local arp table
ip=$(arp | grep 20:64:32:3F:B1:A9 | awk ' { print $1 } ')
# found an ip tied to the mac address?
if [ ! -z $ip ]; then
# if found, do you want to ping it?
ping $ip
else
echo "Not found into local arp table. Trying another way..."
# wanna try your nmap strategy?
# sudo nmap -sP 192.168.15.1/24 | grep 20:64:32:3F:B1:A9
fi;