---
title: nd_opt_rh_len
framework: Kernel
role: symbol
role_heading: Instance Property
platforms: [macOS 12.0+]
path: kernel/nd_opt_rd_hdr/3754149-nd_opt_rh_len
---

# nd_opt_rh_len

## Declaration

```occ
u_int8_t nd_opt_rh_len;
```