The 25 GbE ports typically support 25 Gbps, 10 Gbps, and 1 Gbps operational speeds. Auto-Negotiation support varies depending on the pluggable type and speed.
The following table provides a summary of Auto-Negotiation support for 25 Gbps ports.
| 
                             Transceiver Type  | 
                        
                             Auto-Negotiation  | 
                    
|---|---|
| 
                             25 Gbps DAC  | 
                        
                             Supported Note: 
                                 
                        Exception: VIM5-2Y and VIM5-4Y do not support Auto-Negotiation at 25 Gbps.  | 
                    
| 
                             25 Gbps SR, LR, AOC  | 
                        
                             Not Supported  | 
                    
| 
                             10 Gbps  | 
                        
                             Not Supported  | 
                    
| 
                             1 Gbps  | 
                        
                             Note: 
                                 
                            
                        Not Supported for VSP 7400-48Y.  | 
                    
Forward Error Correction (FEC) is a negotiated port attribute for 25 GbE connections that support Auto-Negotiation. For more information, see Forward Error Correction.