Water-utility compute hosts need overlay for distributed firewall and Guest Introspection, while Edge uplinks need VLAN connectivity to the civic core. How should transport zones be assigned?
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Short Explanation
Transport zones are labeled pipes: overlay for apartment hallways, VLAN for the street hookup. Hang the overlay TZ on compute so DFW and Guest Introspection land there, and hang the VLAN TZ on Edge uplinks—do not mash both into one overlay pipe.
Full Explanation
NSX-T transport zones decide which segments and firewall attachment points a node can host. Compute transport nodes typically join the overlay transport zone so distributed firewall and Guest Introspection apply to overlay workloads. Edge uplinks typically join a VLAN transport zone to reach the physical core. Mixing those blindly, leaving TZs empty, or substituting an Access network range breaks where gateway and distributed firewall can attach.