So earlier today I was fighting with
bond1: error fetching interface information: Device not found
I had a machine with 4 nics that I wanted to bond 2 by to. I had no problem getting the bond0 device up witn any of the interfaces, however getting a bond1 up always resulted in the above error.
The friendly guys from #centos on freenode pointed me to the missing config.
options bonding mode=4 max_bonds=4
The important part being max_bonds
it seems that the default is 1 so adding one more fails.
