Find MAC addresses in /proc or somewhere despite bonding device?

I'm still searching for a more "official" explanation, but according to this blog, the file /proc/net/bonding/${bonding name} will provide the actual mac address for each NIC in the bond (eth0, eth1, etc..), so that might be more useful.

Hope this will help!

On RHEL/CentOS 6:

# ethtool -P <if>

Permanent address: 00:11:22:33:44:55

You can get this from /sys instead of /proc. For example:

$ cat /sys/class/net/eth0/address
0a:58:ac:16:05:13

All the interfaces available are listed under net:

$ ls /sys/class/net/
eth0  lo