I tried to play with almost all options in gigether-options section without any 
results. Port is UP but it still not working properly. 

admin@mx1> show configuration interfaces xe-0/1/4    
description TEST;
gigether-options {
    no-flow-control;
    no-auto-negotiation;
    speed 1g;
}
unit 0 {
    family inet {
        address xx.xx.xx.xx/30;
    }
}

When i removed "speed 10g" from chassis section and bounced FPC port was DOWN. 


> Wiadomość napisana przez Tobias Heister <[email protected]> w dniu 
> 09.10.2020, o godz. 14:44:
> 
> Hi,
> 
> Am 09.10.2020 um 13:12 schrieb Łukasz Trąbiński:
>> In Lab I'm trying to set up 1G port on MX204.
> 
> You might need to play around with autoneg options. we have a working 1G LX 
> SFP running on 18.4R1-S7 on MX204
> 
> in our case thats the gigether section:
> gigether-options {
>    no-flow-control;
>    no-auto-negotiation;
>    speed 1g;
> }
> 
> Not sure if the Flow Control stuff was mandatory, but without the 
> no-auto-negotation the link was not useable. It might also help to check 
> autoneg settings on the other end (if you have access).
> 
> -- 
> Kind Regards
> Tobias Heister

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