Adding a network interface to a bonded interface

I have a RHEL 5 system with a bonded interface configure using only one network port (eth0). So I have config file for ifcfg-bond0 and ifcfg-eth[0-5]. I'd like to configure eth5 to be the second SLAVE in the bond. My question is, after I modify ifcfg-eth5, can I add eth5 to the bond0 interface without disrupting network connectivity by simply doing:

I'm trying to avoid restarting the network service because I don't want to interrupt connectivity.

It will be on, but bonded -- who tells the switch?

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