This counts the Phase-2 security association delete requests sent by this specific Phase-1 tunnel, per its description, the per-tunnel drill-down from the device-wide cisgIpsSgGlobalOutP2SaDelReqs. It isolates which specific tunnel is driving Phase-2 SA teardown activity, which matters when an admin wants to know whether one particular peer relationship's IPsec SAs are churning more than others. A tunnel with an outsized delete-request count relative to its peers might have a locally-configured, shorter SA lifetime or lifesize setting driving more frequent teardowns for that connection specifically.