The default Auto-Negotiation behavior depends on the switch model, port type, and transceiver type. The following table provides the default combinations.
| Model | Port type | Transceiver type | Auto-Negotiation | FEC | 
|---|---|---|---|---|
| VSP4900-48P | 1GBASE-T | Enabled | ||
| VSP4900-24S | SFP | 100BASE-FX | ||
| 1GBASE-T | Enabled | |||
| 1G SFP | Enabled | |||
| VSP4900-24XE | SFP+ | 100BASE-FX | ||
| 1GBASE-T | Enabled The operational state is always enabled regardless of configuration. | |||
| 1G SFP | Disabled | |||
| 10GBASE-T | Enabled The operational state is always enabled regardless of configuration. | |||
| 10G DAC | Disabled | |||
| 10G SFP+ | ||||
| VSP4900-12MXU-12XE | 100M/1/2.5/5/10Gbps Copper | Enabled | ||
| SFP+ | 100BASE-FX | |||
| 1GBASE-T | Enabled The operational state is always enabled regardless of configuration. | |||
| 1G SFP | Disabled | |||
| 10GBASE-T | Enabled | |||
| 10G DAC | Disabled | |||
| 10G SFP+ | ||||
| VIM5-4X | SFP+ | 1GBASE-T | Not Supported | |
| 1G SFP | Disabled | |||
| 10GBASE-T | Enabled | |||
| 10G DAC | Disabled | |||
| 10G SFP+ | ||||
| VIM5-4XE | SFP+ | 1GBASE-T | Enabled The operational state is always enabled regardless of configuration. | |
| 1G SFP | Disabled | |||
| 10GBASE-T | Enabled The operational state is always enabled regardless of configuration. | |||
| 10G DAC | Disabled | |||
| 10G SFP+ | ||||
| VIM5-2Y and VIM5-4Y | SFP28 | 10GBASE-T | Enabled The operational state is always enabled regardless of configuration. | |
| 10G DAC | Disabled | |||
| 10G SFP+ | ||||
| 25G DAC | Disabled | Not Supported | ||
| 25G AOC | Not Supported | |||
| 25G SFP28 | Not Supported | |||
| VIM5-4YE | SFP28 | 10GBASE-T | Enabled The operational state is always enabled regardless of configuration. | |
| 10G DAC | Disabled | |||
| 10G SFP+ | ||||
| 25G DAC | Enabled | FEC is negotiated requesting CL108. | ||
| 25G AOC | FEC auto: CL108 | |||
| 25G SFP28 | FEC auto: CL108 |