The management vlan is use to manage the switches themselves and as such should not have any user ports in them. Cisco recommends using a vlan other than vlan 1 for management ( we use vlan 2 in our sites ). Layer 2 switches can only have vlan interface up so this would be the management vlan with the default-gateway pointing to the Layer 3 SVI ip address for that vlan.
The native vlan is the vlan that is not tagged with a vlan ID when traversing a 802.1q trunk link. Again Cisco recommend using a deidcated vlan for this. Thre should be no user ports in it and you do not need a layer 3 SVI for this vlan as it does not need to be routable. We use vlan 999 at our sites.
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...