The router is Juniper ScreenOS. An interface (with 1 sub-interface) was set to has 2 IP (192.168.1.1 & 192.168.2.1) as gateway. Each has a DHCP server.192.168.1.1 as VLAN 1 and 192.168.2.1 as VLAN 2 The C2960X up-link interface connected to router se...