Vlan setting and Reth Construction for Juniper

First , you should create vlan id(it is tag value) and juniper id(İt is private for Juniper ,Cisco doesnt support layer 3 interface id) same time on your device . Juniper id can be different than vlan id.

You use Reth Structure for redudancy , two interfaces work same time ıf one of them lost connection other ınterface continues the forwarding.

set vlans METRO vlan-id 250 (tag value)
set vlans METRO l3-interface vlan.250(Juniper id )

set interfaces vlan unit 250 description METRO
set interfaces vlan unit 250 family inet address 20.20.16.2/30

set interfaces ge-0/0/3 unit 0 description METRO_VLAN250
set interfaces ge-0/0/3 unit 0 family ethernet-switching port-mode trunk
set interfaces ge-0/0/3 unit 0 family ethernet-switching vlan members METRO

set security zones security-zone Metro host-inbound-traffic system-services all
set security zones security-zone Metro host-inbound-traffic protocols all
set security zones security-zone Metro interfaces vlan.250

or Other Option;

set interfaces reth22 vlan-tagging
set interfaces reth22 redundant-ether-options redundancy-group 1
set interfaces reth22 unit 0 description METRO
set interfaces reth22 unit 0 vlan-id 250
set interfaces reth22 unit 0 family inet address 20.20.16.1/30

set interfaces ge-2/0/22 description METRO_VLAN250
set interfaces ge-2/0/22 gigether-options redundant-parent reth22
set interfaces ge-11/0/22 gigether-options redundant-parent reth22

set security zones security-zone Metro host-inbound-traffic system-services all
set security zones security-zone Metro host-inbound-traffic protocols all
set security zones security-zone Metro interfaces reth22.0