|
Feature |
Product |
Release introduced |
|---|---|---|
|
Auto-Negotiation |
5320 Series |
Fabric Engine 8.6 |
|
5420 Series |
VOSS 8.4 Note:
SFP-DD ports are only available if you disable Advanced Feature Bandwidth Reservation. |
|
|
5520 Series |
VOSS 8.2.5 Only on the following switch models: 5520-24T 5520-24W 5520-48T 5520-48W 5520-12MW-36W 5520-48SE QSFP28/QSFP+ ports, and all fixed fiber ports, at 1 Gbps only Note:
QSFP28 ports are only available if you disable Advanced Feature Bandwidth Reservation. 5520-VIM-4XE at 1 Gbps only and 5520-VIM-4YE at 25 Gbps only |
|
|
5720 Series |
Fabric Engine 8.7 |
The Auto-Negotiation feature enables the device to switch between the various operational modes in an ordered fashion and lets you select a specific operational mode. The Auto-Negotiation feature also provides a parallel detection (called autosensing) function to recognize compatible devices, even if they do not support Auto-Negotiation and helps the device sense the link speed only; not the duplex mode.
You can use the show interfaces gigabitEthernet l1-config command to see the Auto-Negotiation operational state on a port. The operational state uses the configuration and transceiver type present in the port. If you enable Auto-Negotiation for the port but the transceiver type does not support Auto-Negotiation, the operational state is disabled (false).
Important
The software requires the same Auto-Negotiation configuration on link partners to avoid incorrect declaration of link status. Mismatched configuration can cause the links to stay down as well as unpredictable behavior. Ensure the Auto-Negotiation configuration between local ports and their remote link partners match before upgrading software releases.