Overview of SteelHead SaaS : Compatibility with SteelHead models
  
Compatibility with SteelHead models
SteelHead model families xx50, xx55, xx70, SteelHead EX, SteelFusion Edge, and GX10000 support SteelHead SaaS. All SteelHead (virtual edition) models also support SteelHead SaaS.
Note: Legacy SteelHead models – xx50, xx55 (excluding CX255), SteelHead EX, and VCXxx55 – do not support the latest versions of RiOS software. Consult the Riverbed support site for RiOS versions applicable to your SteelHead models.