Auto-Negotiation

Table 1. Auto-Negotiation product support

Feature

Product

Release introduced

For configuration details, see VOSS User Guide.

Auto-Negotiation

5520 Series

VOSS 8.2.5

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

VSP 4450 Series

VSP 4000 4.0

VSP 4900 Series

VOSS 8.1

Switch models:

  • VSP4900-24S and VSP4900-48P - all fixed ports

  • VSP4900-12MXU-12XE - all fixed ports, with ports 13 to 24 at 1 Gbps only

  • VSP4900-24XE - all fixed ports at 1 Gbps only

VIM5-4XE at 1 Gbps only and VIM5-4YE at 25 Gbps only

VSP 7200 Series

VOSS 4.2.1

VSP 7400 Series

VOSS 8.0

VSP 8200 Series

VSP 8200 4.0

VSP 8400 Series

VOSS 4.2

VSP 8600 Series

VSP 8600 4.5

XA1400 Series

VOSS 8.0.50

The Auto-Negotiation feature enables the devices to switch between the various operational modes in an ordered fashion and enables you to 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).