If you have multiple regional offices to be terminated on the switch and going to have a trunk to the router for L3 termination , then dot1q needs to be enabled in your switch and your router sub-interfaces for correspodning vlans
If your switch us a unmanaged one , then you can have one point to point link on the default vlan , no sub-interfaces required and no trunk , need to make sure your Ethernet provider would give a Ethernet link without any Vlan specification.
If you require another point to point link , its not possible.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...