For some reason is_bond_member is not in the configuration after the description
eth2 with option is_bond_member
eth3 without option is_bond_member
############## MY DEBUG START:
{'description': 'fofof',
'duplex': 'auto',
'hw_id': '50:08:00:01:00:03',
'ifname': 'eth3',
'ip': {'arp_cache_timeout': '30'},
'mtu': '1500',
'speed': 'auto'}
####### MY DEBUG END #######