Technical Tip: Speed option 1000full not available on certain ports

[jstan]

Description	This article describes the reason of missing speed option settings in FortiGate D/E series with NP6.
Scope	FortiOS D/E/F series with NP6.
Solution	Based on the standard, auto-negotiation of copper port is mandatory for 1G speed, therefore manually forcing 1G speed in CLI is no longer supported, this option has been removed permanently: FortiGate-1100E (port1) # set speed auto       <----- Automatically adjust speed. 100full    <----- 100M full-duplex. Due to this the option is not available in the copper ports, but in the optical ones it is possible to configure: FortiGate-1100E (port25) # set speed 1000full     <----- 1000M full-duplex. 10000full    <----- 10G full-duplex. More information can be found in the following sites: https://standards.ieee.org/findstds/interps/IEEE802.3af-2003interp-6.pdf http://noahdavids.org/self_published/gigabit-AN.html If the port needs to negotiate a 1G speed, the FortiGate port needs to be set to auto negotiation and the neighbor switch port can be configured for 1000full.