Re: Connection between Ex4300 and MX security appliance

okay, my mistake was creating V10 as L3 on Ex4300 and that in connection of trunk on both ends EX4300+MX kills the network.

I have delete L3 v10 - interfaces irb unit 10 - 192.168.10.1/24 already configured on EX4300 and set ge0/0/10:

unit 0 {
family ethernet-switching {
vlan {
members 10;
}
}
}

Same thing on the MX - access port with vlan 10. Now it looks like it works, at least no chnages in spanning tree brige so network is ok.  Tomorrow I will set access port with v10 and try to set VM connectedt to that port. 

Thank you all for your help!!!