[Fortiswitch internal interface fortiswitch internal interface, Jun 05, 2018 · Now i have -> modem - cisco(sw) - cisco(sw) - Fortigate. I want change the cisco switch (connected to fortigte) to fortiswitch. Cisco port configuration where all is ok "interface gigabitethernet45 description "uplink vlan 100" switchport trunk native vlan 100 !" Fortiswitch conf for this port edit "port6" set native-vlan 100 set igmp-snooping ... ]