Can Arcsight ESM and ArcMC could have 2 IP Address? 1 for Data Center A and 1 for Data Center B. Thank you.
In general it shouldn't be any problem because this is a matter of OS layer the network. So if you configure correctly your linux box the ESM (ArcMC also) will receive everything. It doesn't care about how many or which interfaces you will use.
Now if you are using an appliance it is a different story. Again it shouldn't be an issue but better check it with the support it could lead you to some unsupported state.
please go to this link:
This is where you would usually log in to your account and create Service Request with your SAID.
There is a "chat" option on same page if you are not sure so you can ask there.