Storage monitoring on Opmanager 11600

Storage monitoring on Opmanager 11600

I have licence version of opmanager 11600.  I wanted to add some EMC storages in current version of opmanager for complete monitoring. DO i need to purchase separate licence of opstor or just need to install its plug-in. 
After installing plug-in, will i need to open another url for opstor, or we will get monitoring gui within opmanager gui only.
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