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.