I am setting a network topology with a couple of devices. This includes a ârouter on stickâ, with 3620 being the router and 2924 being the switch. It works fine with first 2 vlans (vlan 2 and 3) configured. However, the problem came up when I was trying to set another gateway for these two vlans. When I added 2507 to the switch on the native vlan, the switch can ping 2507's Ethernet port. But the router 3620 can not ping either switch or the 2507. The 2507's Ethernet port, switch management vlan interface and one subinterface of 3620 are all in native vlan 1.