---
title: nd_opt_dnssl_lifetime
framework: Kernel
role: symbol
role_heading: Instance Property
platforms: [macOS 12.0+]
path: kernel/nd_opt_dnssl/3754119-nd_opt_dnssl_lifetime
---

# nd_opt_dnssl_lifetime

## Declaration

```occ
u_int32_t nd_opt_dnssl_lifetime;
```