There are 2 methods of configuring the native VLAN on a router: -Use the command encapsulation dot1q vlan-id native on the router subinterface. -Configure the IP address for the native VLAN on the router's physical interface (the encapsulation dot1q vlan-id command is not necessary)
1) The VLAN must exist on the switch. 2) The switch must have at least one access port in the VLAN in an up/up state, AND/OR one trunk port that allows the VLAN that is in an up/up state. 3) The VLAN must not be shutdown (you can use the shutdown command to disable a VLAN. 4)The SVI must not be shutdown (SVIs are disabled by default)
router:
-Use the command encapsulation dot1q vlan-id
native on the router subinterface.
-Configure the IP address for the native VLAN on the
router's physical interface (the encapsulation dot1q
vlan-id command is not necessary)
2) The switch must have at least one access port in the VLAN in an up/up state, AND/OR one
trunk port that allows the VLAN that is in an up/up state.
3) The VLAN must not be shutdown (you can use the shutdown command to disable a VLAN.
4)The SVI must not be shutdown (SVIs are disabled by default)