SCOM 2012 introduces the concept of Resource Pools. We can now create a resource pool for Network Devices and non-Windows Servers for failover \ High Availability.
There are also out of the box Resource Pools for Notification Servers, AD Integration and an “All Management Servers” Resource Pool.
Creating Resource Pools – http://technet.microsoft.com/en-us/library/hh230706.aspx
Managing Resource Pools – http://technet.microsoft.com/en-us/library/hh287152.aspx
Couple of things to be aware of:
1) Windows agents do not use resource pools for failover which continues to function exactly the same as in SCOM 2007.
2) Resource Pools only apply to the “Health Service” functionality at present and not to SDK functionality. So you can’t use Resource Pools for OpsMgr connectors or for Console, Connectors or Reporting failover. For SDK failover, the current solution is Network Load Balancing.

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[...] 3) Resource Pools for High Availability for Network Devices and non-Windows agents – More info [...]