Hi Jedrzej
I hope the below pasted config belongs to the interface you are trying to make as Trunk port
ge-1/0/0 {
unit 0 {
family inet {
address 192.168.253.34/30;
}
family iso;
}
}
Could you please check the Global mode option under show ethernet-switching global-information ?
If the Global mode option appears as Not-set or Transparent, Please give this command set protocols l2-learning global-mode switching and do a commit
You might have to reboot the device after commit, After which please try to configure the port set interfaces ge-1/0/0 unit 0 family ethernet-switching port-mode trunk
Thanks
Arul