The default Auto-Negotiation behavior depends on the switch model, port type, and transceiver type. The following tables provide the default combinations.
| Port type | Model | Transceiver type | Auto-Negotiation | FEC | 
|---|---|---|---|---|
| 10/100/1000Base-T | 5320-24P-8XE 5320-24T-8XE 5320-48P-8XE 5320-48T-8XE 5320-16P-4XE 5320-16P-4XE-DC | Enabled | ||
| First 4 XE SFP+ Note: 
                                     By default, the first 3 XE ports on the 24- and 48-port models are not available for front panel use because they are reserved for Advanced Feature Bandwidth Reservation. | 5320-24P-8XE 5320-24T-8XE 5320-48P-8XE 5320-48T-8XE 5320-16P-4XE 5320-16P-4XE-DC | 100M | No 100M support | |
| 1GBASE-T | Enabled. The operational state is always enabled regardless of configuration. | |||
| 1G SFP | Not Supported | |||
| 10GBASE-T | Enabled. The operational state is always enabled regardless of configuration. | |||
| 10G DAC | Not Supported | |||
| 10G SFP+ | ||||
| Last 4 XE SFP+ | 5320-24P-8XE 5320-24T-8XE 5320-48P-8XE 5320-48T-8XE | 100M | 100FX part number 10063 only | |
| 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 | Not Supported | |||
| 10G SFP+ | 
| Port type | Model | Transceiver type | Auto-Negotiation | FEC | 
|---|---|---|---|---|
| 10/100/1000Base-T | 5420F-24T-4XE 5420F-24P-4XE 5420F-48T-4XE 5420F-48P-4XE 5420F-48P-4XL 5420F-8W-16P-4XE 5420F-16W-32P-4XE 5420M-16MW-32P-4YE 5420M-24W-4YE 5420M-48W-4YE 5420M-24T-4YE 5420M-48T-4YE 5420M-16MW-32P-4YE | Enabled | ||
| 100M/1/2.5Gbps Copper | 5420F-16MW-32P-4XE 5420M-16MW-32P-4YE | Enabled | ||
| SFP | 5420F-24S-4XE | 100BASE-FX | ||
| 1GBASE-T | Enabled | |||
| 1G SFP | Enabled | |||
| SFP+ | 5420F-24T-4XE 5420F-24P-4XE 5420F-48T-4XE 5420F-48P-4XE 5420F-48P-4XL 5420F-8W-16P-4XE 5420F-16W-32P-4XE 5420F-16MW-32P-4XE 5420F-24S-4XE | 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+ | ||||
| SFP28 | 5420M-24W-4YE 5420M-48W-4YE 5420M-24T-4YE 5420M-48T-4YE 5420M-16MW-32P-4YE | 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+ | ||||
| 25G DAC | Enabled | FEC is negotiated requesting CL108 | ||
| 25G AOC | FEC auto:CL108 | |||
| 25G SFP28 | FEC auto:CL108 | |||
| SFP-DD | 5420F-24T-4XE 5420F-24P-4XE 5420F-48T-4XE 5420F-48P-4XE 5420F-48P-4XL 5420F-8W-16P-4XE 5420F-16W-32P-4XE 5420F-24S-4XE 5420M-16MW-32P-4YE 5420M-24W-4YE 5420M-48W-4YE 5420M-24T-4YE 5420M-48T-4YE 5420M-16MW-32P-4YE | 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+ | 
| Port type | Model | Transceiver type | Auto-Negotiation | FEC | 
|---|---|---|---|---|
| 1GBASE-T | 5520-24T 5520-48T 5520-24W 5520-48W | Enabled | ||
| 100M/1/2.5/5 Gbps Copper | 5520-12MW-36W | Enabled | ||
| SFP | 5520-48SE | 100BASE-FX | ||
| 1GBASE-T | Enabled The operational state is always enabled regardless of configuration. | |||
| 1G SFP | Enabled | |||
| SFP+ | 5520-24X 5520-VIM-4X and 5520-VIM-4XE | 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+ | ||||
| SFP28 | 5520-VIM-4YE | 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 | 
| Port type | Model | Transceiver type | Auto-Negotiation | FEC | |
|---|---|---|---|---|---|
| 100 M/1/2.5/5 Gbps Copper | 5720-24MW 5720-48MW | Enabled | |||
| 100 M/1/2.5/5/10 Gbps Copper | 5720-24MXW 5720-48MXW | Enabled | |||
| QSFP28 | 5720-24MW 5720-48MW 5720-24MXW 5720-48MXW | 40G DAC | Enabled | ||
| 40G AOC | |||||
| 40G QSFP+ | |||||
| 100G DAC | Enabled | FEC is negotiated requesting CL91 | |||
| 100G AOC | FEC auto: CL91 | ||||
| 100G QSFP28 | FEC auto: CL91 | ||||
| SFP28 | 5720-VIM-6YE | 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 AOC | |||||
| 10G SFP+ | |||||
| 25G DAC | Enabled | FEC is negotiated requesting CL108 | |||
| 25G AOC | FEC auto:CL108 | ||||
| 25 SFP28 | FEC auto:CL108 | ||||
| QSFP28 | with QSFP adapter | 5720-VIM-2CE | 10GBASE-T | Enabled The operational state is always enabled regardless of configuration. | |
| 10G DAC | Disabled | ||||
| 10G AOC | |||||
| 10G SFP+ | |||||
| 25G DAC | Enabled | FEC is negotiated requesting CL108 | |||
| 25G AOC | FEC auto:CL108 | ||||
| 25G SFP28 | FEC auto:CL108 | ||||
| 40G DAC | Enabled | ||||
| 40G AOC | |||||
| 40G QSFP+ | |||||
| 100G DAC | Enabled | FEC is negotiated requesting CL91 | |||
| 100G AOC | FEC auto:CL91 | ||||
| 100G QSFP28 | FEC auto:CL91 | ||||
| Port type | Model | Transceiver type | Auto-Negotiation | FEC | |
|---|---|---|---|---|---|
| 10GBase-T | 7520-48XT-6C | Enabled 1G, 10G | |||
| SFP28 | 7520-48Y-8C 7520-48YE-8CE | 1GBASE-T Note: 7520-48Y-8C only | Enabled The operational state is always enabled regardless of configuration. | ||
| 1G SFP Note: 7520-48Y-8C only | Not Supported | ||||
| 10GBASE-T | Enabled The operational state is always enabled regardless of configuration. | ||||
| 10G DAC | Not Supported | ||||
| 10G SR/AOC | |||||
| 25G DAC | Enabled | Auto-Negotiation | |||
| 25G SR/AOC | CL108 | ||||
| QSFP28 | 7520-48XT-6C 7520-48Y-8C 7520-48YE-8CE | 40G DAC | Enabled | ||
| 40G SR/AOC | |||||
| 100G DAC | Enabled | Auto-Negotiation | |||
| 100G SR/AOC | CL91 | ||||
| QSFP28 | Channelized | 7520-48XT-6C 7520-48Y-8C 7520-48YE-8CE | 40G DAC: 4x10G | Enabled | |
| 40G SR/AOC: 4x10G | |||||
| 100G DAC: 4x25 | Enabled | Auto-Negotiation | |||
| 100G SR/AOC: 4x25 | CL108 | ||||
| QSFP28 | with QSFP adapter | 7520-48XT-6C 7520-48Y-8C 7520-48YE-8CE | 1G BASE-T Note: 7520-48XT-6C and 7520-48Y-8C only | Enabled The operational state is always enabled regardless of configuration. | |
| 1G SFP Note: 7520-48XT-6C and 7520-48Y-8C only | Not Supported | ||||
| 10GBASE-T | Enabled The operational state is always enabled regardless of configuration. | ||||
| 10G DAC | Not Supported | ||||
| 10G SR/AOC | |||||
| 25G DAC | Enabled | Auto-Negotiation | |||
| 25G SR/AOC | CL108 | ||||
| Port type | Model | Transceiver type | Auto-Negotiation | FEC | |
|---|---|---|---|---|---|
| QSFP28 | 7720-32C | 40G DAC | Enabled | ||
| 40G SR/AOC | |||||
| 100G DAC | Enabled | Auto-Negotiation | |||
| 100G SR/AOC | CL91 | ||||
| QSFP28 | Channelized | 7720-32C | 40G DAC: 4x10G | Enabled | |
| 40G SR/AOC: 4x10G | |||||
| 100G DAC: 4x25 | Enabled | Auto-Negotiation | |||
| 100G SR/AOC: 4x25 | CL108 | ||||
| QSFP28 | with QSFP adapter | 7720-32C | 1G BASE-T | Enabled The operational state is always enabled regardless of configuration. | |
| 1G SFP | Not Supported | ||||
| 10GBASE-T | Enabled The operational state is always enabled regardless of configuration. | ||||
| 10G DAC | Not Supported | ||||
| 10G SR/AOC | |||||
| 25G DAC | Enabled | Auto-Negotiation | |||
| 25G SR/AOC | CL108 | ||||