| 
                                 Feature  | 
                            
                                 Product  | 
                            
                                 Release introduced  | 
                        
|---|---|---|
| 
                                 Energy Efficient Ethernet (EEE)  | 
                            
                                 VSP 4450 Series  | 
                            
                                 Not Supported  | 
                        
| 
                                 VSP 4900 Series  | 
                            
                                 VOSS 8.1 All fixed ports on VSP4900-48P and ports 1/1-1/12 on VSP4900-12MXU-12XE  | 
                        |
| 
                                 VSP 7200 Series  | 
                            
                                 Not Supported  | 
                        |
| 
                                 VSP 7400 Series  | 
                            
                                 Not Supported  | 
                        |
| 
                                 VSP 8200 Series  | 
                            
                                 Not Supported  | 
                        |
| 
                                 VSP 8400 Series  | 
                            
                                 VOSS 8.1 8424GT ESM only  | 
                        |
| 
                                 VSP 8600 Series  | 
                            
                                 Not Supported  | 
                        |
| 
                                 XA1400 Series  | 
                            
                                 Not Supported  | 
                        
Energy Efficient Ethernet (EEE) supports the IEEE 802.3az standard for power savings in Ethernet networks for a select group of physical layer devices. A physical device that can support low power idle (LPI) mode is considered EEE-capable. Legacy devices that do not support EEE can be made EEE-compliant with an EEE-compliant PHY and an SDK version that allows the MAC device to interact with the PHY EEE functionality.
In a typical configuration, the EEE protocol communicates with the switch and the physical device to determine when to enter LPI mode during a period of inactivity, and to exit LPI mode when data transmission resumes.

Note
EEE is supported only on copper ports that have auto-negotiation enabled on them.