How to switch between send video layers in simulcast server-side??

[xprgv]

I want to push simulcast stream to browser client, but its seems peer connection send only lower resolution layer to client
I use this code to configure tracks

rtpSender, err := pc.AddTrack(trackLow)
if err != nil {
    return err
}
if err := rtpSender.AddEncoding(trackMedium); err != nil {
    return err
}
if err := rtpSender.AddEncoding(trackHigh); err != nil {
    return err
}

but receive on client only first track (trackLow). What I need to do to switch track to trackHigh?

[markelarauzo7]

Here (https://github.com/Sean-Der/pion-bidirectional-simulcast) you can see an example for simulcast. Switching between tracks will be up to you according to your logic. Here (https://www.meetecho.com/blog/simulcast-janus-ssrc/) you can see how an OSS SFU does it too