Radvd
{{Short description|Server software for computer network configuration}}
{{lowercase}}
{{Infobox software
| name = radvd
| developer = Reuben Hawkins, Robin Johnson
| released = {{Start date and age|1996}}
| latest release version = 2.20
| latest release date = {{Start date and age|2024|12|31}}
| latest preview version = 2.20-rc1
| latest preview date = {{Start date and age|2023|11|17}}
| programming language = C
| language = English
| license = BSD-style vanity[http://lists.litech.org/pipermail/radvd-devel-l/2006-July/000229.html Pekka Savola on radvd-devel-l mailing list]
| website = [https://radvd.litech.org/ radvd]
}}
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 {{IETF RFC|2461}}.{{IETF RFC|2461}}, Neighbor Discovery for IP Version 6 (IPv6), T. Narten, E. Nordmark, W. Simpson (December 1998)
Daemon
The Router Advertisement Daemon is used by system administrators in stateless autoconfiguration ({{IETF RFC|4862}}.{{IETF RFC|4862}}, IPv6 Stateless Address Autoconfiguration, S. Thomson, T. Narten, T. Jinmei (September 2007)) 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 {{IETF RFC|6106}}.{{IETF RFC|6106}}, IPv6 Router Advertisement Options for DNS Configuration, J. Jeong (Ed.), S. Park, L. Beloeil, S. Madanapalli (November 2010)
See also
{{Portal|Free and open-source software}}
- Dynamic Host Configuration Protocol (DHCP)
- Domain Name System (DNS)
- Neighbor Discovery Protocol
- Netsh on Microsoft Windows covers similar functionality
References
{{reflist}}
External links
- [http://radvd.litech.org/ Radvd web site]
- [https://github.com/radvd-project/radvd/ Source code]