25 GbE Port Considerations

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.

Table 1. 25 Gbps Port Auto-Negotiation

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.