How to disable Layer 2 or Layer 3 discoveryIssue There can be times where it may be required to disable Layer 2 or Layer 3 discovery independently for troubleshooting issues within your instance.ResolutionDisabling Layer 2 discovery: Edit or create the system property sa.create_physical_connections.active and set the value to false. Disable Layer 3 discovery: Edit or create the system property glide.discovery.L3_mapping and set it to false.