IRB Created using VRRP. Below example for X Firewall set interfaces irb unit 10 family inet sampling input set interfaces irb unit 10 family inet sampling output set interfaces irb unit 10 family inet address 100.0.50.1/28 vrrp-group 1 virtual-address 100.0.50.3 set interfaces irb unit 10 family inet address 100.0.50.1/28 vrrp-group 1 priority 202 set interfaces irb unit 10 family inet address 100.0.50.1/28 vrrp-group 1 preempt set interfaces irb unit 10 family inet address 100.0.50.1/28 vrrp-group 1 accept-data set vlans MGMT vlan-id 10 set vlans MGMT l3-interface irb.10 Zones created in both firewalls. Below example for X Firewall set security zones security-zone MGMT host-inbound-traffic system-services all set security zones security-zone MGMT host-inbound-traffic protocols all set security zones security-zone MGMT interfaces irb.10 Trunking between Firewalls. below example for X and Y Firewalls. Same for A and B Firewalls set interfaces ge-0/0/0 description **Link-to-Y** set interfaces ge-0/0/0 unit 0 family ethernet-switching interface-mode trunk set interfaces ge-0/0/0 unit 0 family ethernet-switching vlan members all IRB assigned to Interfaces set interfaces ge-0/0/6 description  set interfaces ge-0/0/6 unit 0 family ethernet-switching interface-mode trunk set interfaces ge-0/0/6 unit 0 family ethernet-switching vlan members MGMT Static Route Created between locations. Below example is for X Firewall set routing-options static route 192.168.1.0/26 next-hop 10.10.10.6