This reports the lifecycle state of the security association: larval while still being negotiated, mature once fully established and passing traffic, dying as it approaches expiration and rekeying, or dead once it should be removed. Admins troubleshooting a VPN that isn't passing traffic check this first - an SA stuck in larval points to a failed or incomplete IKE negotiation, while dying is often just a normal rekey in progress rather than a fault. Seeing ntqVPNState stay larval for more than a few seconds on a tunnel that should be up indicates the phase-2 negotiation with the peer is failing.