ERP client launches but cannot reach license server after VLAN move

Scenario

The ERP app opens on desktops, but licensing checks fail after the server or clients were moved to another VLAN.

Recommended Resolution Path

1. Verify routing and firewall rules between the client subnet and the license server.
2. Check DNS resolution and whether the ERP uses a hard-coded hostname or port.
3. Test from one known-good client on the new VLAN before broader rollback.
4. If the app is brittle, document the exact network dependencies for future moves.

Technician Notes

Document what changed, what confirmed the fix, and whether the issue points to a broader standards gap worth addressing for the client.