From Wikipedia, the free encyclopedia
Developer(s)Reuben Hawkins, Robin Johnson
Initial release1996; 27 years ago (1996)
Stable release
2.19 / September 23, 2020; 3 years ago (2020-09-23)
Preview release
2.18-rc1 / February 16, 2019; 4 years ago (2019-02-16)
Written inC
PlatformLinux and BSD
Available inEnglish
LicenseBSD-style vanity[1]

The Router Advertisement Daemon (radvd) is an open-source software product that implements link-local advertisements of IPv6 router addresses and IPv6 routing prefixes using the Neighbor Discovery Protocol (NDP) as specified in RFC 2461.[2]


The Router Advertisement Daemon is used by system administrators in stateless autoconfiguration(RFC 4862.[3]) methods of network hosts on Internet Protocol version 6 networks.

When IPv6 hosts configure their network interface controllers, they multicast router solicitation (RS) requests onto the network to discover available routers. Radvd answers requests with router advertisement (RA) messages. In addition, radvd periodically multicasts RA packets to the attached link to update network hosts. The router advertisement messages contain the routing prefix used on the link, the link maximum transmission unit (MTU), and the address of the responsible default router.

Radvd also supports the recursive DNS server (RDNSS) and DNS search list (DNSSL) options for NDP published in RFC 6106.[4]

See also[edit]


  1. ^ Pekka Savola on radvd-devel-l mailing list
  2. ^ RFC 2461, Neighbor Discovery for IP Version 6 (IPv6), T. Narten, E. Nordmark, W. Simpson (December 1998)
  3. ^ RFC 4862, IPv6 Stateless Address Autoconfiguration, S, Thomson, T. Narten, T. Jinmei (September 2007)
  4. ^ RFC 6106, IPv6 Router Advertisement Options for DNS Configuration, J. Jeong (Ed.), S. Park, L. Beloeil, S. Madanapalli (November 2010)

External links[edit]