---
title: nd_opt_rh_reserved1
framework: Kernel
role: symbol
role_heading: Instance Property
platforms: [macOS 12.0+]
path: kernel/nd_opt_rd_hdr/3754150-nd_opt_rh_reserved1
---

# nd_opt_rh_reserved1

## Declaration

```occ
u_int16_t nd_opt_rh_reserved1;
```