{"id":"ext-nlb-neg-any-nic-ig-nic0-only","text":"External passthrough NLB instance groups always use `nic0`; zonal NEGs (`GCE_VM_IP`) can target any network interface.","truth_value":"IN","source":"entries/2026/03/10/lb-tcp-udp.md","source_url":"","source_hash":"e2b912f095c82ab7","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"ext-nlb-neg-any-nic-ig-nic0-only","truth_value":"IN","reason":"premise"}]}}