nmap -sP 10.0.0.0/8 | grep -v "Host" | tail -n +3 | tr '\n' ' ' | sed 's|Nmap|\nNmap|g' | grep "MAC Address" | cut -d " " -f5,8-15

nmap scan hosts for IP, MAC Address and device Vendor/Manufacturer

In the field, I needed to script a process to scan a specific vendor devices in the network. With the help of nmap, I got all the devices of that particular vendor, and started a scripted netcat session to download configuration files from a tftp server. This is the nmap loop (part of the script). You can however, add another pipe with grep to filter the vendor/manufacturer devices only. If want to check the whole script, check in http://pastebin.com/ju7h4Xf4
Sample Output
10.0.0.1 AA:BB:CC:DD:EE:FF (Vendor)
10.0.0.2 BB:CC:DD:EE:FF:AA (Manufacturer)
10.0.0.3 FF:FF:FF:FF:FF:FF (Unknown)

0
2014-12-26 18:31:53

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