D-Link DGS-1510-28P User Manual - Page 613
Default, Command Mode, Command Default Level, Usage Guideline, Example, 5 speed auto-downgrade,
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DGS-1510 Series Gigabit Ethernet SmartPro Switch CLI Reference Guide 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)# 66-5 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. 610
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