Meraki Full-Stack Design Related Question - Dropping Untagged traffic
What concerns would you have when removing VLAN 1 entirely from a Meraki MS/MX/MR network and dropping untagged traffic across all interconnections (trunks)?
I know there are some requirements to keep VLAN 1 as native VLAN in a mixed Meraki/Catalyst/Nexus environment, so this question focuses on Meraki hardware only for discussion sake.
To meet network security best practices I often wonder, why not remove VLAN 1 from the MX, tag all the subnets across the MX LAN ports to MS switching and configure all the trunks to drop untagged traffic.
I don't see any issue but have heard sometime dropping untagged traffic could cause problems, I just haven't seen these problems myself.
If you set a VLAN as native and don't include it in the trunk and do the same on a Cisco Catalyst switch at the other end, then the link will not pass the traffic in the native VLAN, I can confirm this from experience...