[CentOS] How to make a network interface come up automatically on link up?

> Mar 25 11:38:09 resolve02 kernel: mlx4_en: eth2: Link Up
> Mar 25 11:38:09 resolve02 NetworkManager[4429]: <info> (eth2): carrier
> now ON (device state 2)
> Mar 25 11:38:09 resolve02 NetworkManager[4429]: <info> (eth2): device
> state change: 2 -> 3 (reason 40)

Is the network manager REALLY disabled on that interface?

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Eero