Owners manual

DGS-1510 Series Gigabit Ethernet SmartPro Switch CLI Reference Guide
603
to separate multiple speeds. If the speed list is not specified, all speed
will be advertised.
Default
The speed will be set as auto for 1000BASE-T interfaces.
Command Mode
Interface Configuration Mode.
Command Default Level
Level: 12.
Usage Guideline
If the specified speed is not supported by the hardware, error messages will be returned. For a
1000BASE-T connection, if the speed is specified to 1000 Mbps, the port must be configured as master
or slave.
If speed is set to 1000 Mbps, or 10 Gbps, then the duplex mode cannot be set to half-duplex. If the duplex
mode is set to half-duplex, then the speed cannot be set to 1000 Mbps, or 10 Gbps.
Auto-negotiation will be enabled if either the speed parameter is set to auto, or the duplex parameter is
set to auto. If the speed parameter is set to auto, and the duplex parameter is set to the fixed mode. Only
the speed will be negotiated. The advertised capability will be configured to the duplex mode combined
with all the possible speeds. If the speed is to set to a fixed speed and duplex is set to auto, only the
duplex mode is negotiated. The advertised capability will be both full and half-duplex mode combined with
the configured speeds.
For 10GBASE-R connections, if auto-negotiation is enabled, the system will automatically configure the
speed (1000M or 10G) according to the type of SFP/SFP+.
Example
This example shows how to configure eth1/0/1 to only auto-negotiate to 10 or 100 Mbps.
Switch# configure terminal
Switch(config)# interface eth1/0/1
Switch(config-if)# speed auto 10,100
Switch(config-if)#
65-5 speed auto-downgrade
This command is used to enable automatically downgrading advertised speed in case a link cannot be
established at the available speed. Use the no form of the command to disable it.
speed auto-downgrade
no speed auto-downgrade
Parameters
None.
Default
By default, this option is disabled.
Command Mode
Interface Configuration Mode.