Hi Suraj,
the subsystem runs indeed on (usually) the primary node. But traffic is switched between the nodes. It runs through the switching fabric link. I've confirmed that both ge-0/0/4 and ge-5/0/4 are active and switching traffic.
This is the relevant part of the config:
interfaces { swfab0 { fabric-options { member-interfaces { ge-0/0/3; } } } swfab1 { fabric-options { member-interfaces { ge-5/0/3; } } } ge-0/0/4 { unit 0 { family ethernet-switching { port-mode trunk; vlan { members vlan-transport; } } } } ge-5/0/4 { unit 0 { family ethernet-switching { port-mode trunk; vlan { members vlan-transport; } } } } vlan { unit 100 { family inet { address 192.168.0.254/24; } } } } vlans { vlan-transport { vlan-id 100; l3-interface vlan.100; } }
Regards,
Steve