.. _router-advert: ##################### Router Advertisements ##################### :abbr:`RAs (Router advertisements)` are described in :rfc:`4861#section-4.6.2`. They are part of what is known as :abbr:`SLAAC (Stateless Address Autoconfiguration)`. Supported interface types: * bonding * bridge * ethernet * l2tpv3 * openvpn * pseudo-ethernet * tunnel * vxlan * wireguard * wireless * wirelessmodem Enabling Advertisments ~~~~~~~~~~~~~~~~~~~~~~~ .. cfgcmd:: set service router-advert interface <interface> .... .. stop_vyoslinter .. csv-table:: :header: "Field", "VyOS Option", "Description" :widths: 10, 10, 20 "Cur Hop Limit", "hop-limit", "Hop count field of the outgoing RA packets" """Managed address configuration"" flag", "managed-flag", "Tell hosts to use the administered stateful protocol (i.e. DHCP) for autoconfiguration" """Other configuration"" flag", "other-config-flag", "Tell hosts to use the administered (stateful) protocol (i.e. DHCP) for autoconfiguration of other (non-address) information" "MTU","link-mtu","Link MTU value placed in RAs, exluded in RAs if unset" "Router Lifetime","default-lifetime","Lifetime associated with the default router in units of seconds" "Reachable Time","reachable-time","Time, in milliseconds, that a node assumes a neighbor is reachable after having received a reachability confirmation" "Retransmit Timer","retrans-timer","Time in milliseconds between retransmitted Neighbor Solicitation messages" "Default Router Preference","default-preference","Preference associated with the default router" "Interval", "interval", "Min and max intervals between unsolicited multicast RAs" "DNSSL", "dnssl", "DNS search list to advertise" "Name Server", "name-server", "Advertise DNS server per https://tools.ietf.org/html/rfc6106" .. start_vyoslinter Advertising a Prefix '''''''''''''''''''' .. cfgcmd:: set service router-advert interface <interface> prefix 2001:DB8::/32 .. stop_vyoslinter .. csv-table:: :header: "VyOS Field", "Description" :widths: 10,30 "no-autonomous-flag","Prefix can not be used for stateless address auto-configuration" "no-on-link-flag","Prefix can not be used for on-link determination" "preferred-lifetime","Time in seconds that the prefix will remain preferred (default 4 hours)" "valid-lifetime","Time in seconds that the prefix will remain valid (default: 30 days)" .. start_vyoslinter Disabling Advertisements ~~~~~~~~~~~~~~~~~~~~~~~~ To disable advertisements without deleting the configuration: .. cfgcmd:: set service router-advert interface <interface> no-send-advert Example Configuration ~~~~~~~~~~~~~~~~~~~~~ .. code-block:: none interface eth0.2 { default-preference high hop-limit 64 interval { max 600 } name-server 2001:db8::1 name-server 2001:db8::2 other-config-flag prefix 2001:db8:beef:2::/64 { valid-lifetime 2592000 } reachable-time 0 retrans-timer 0 }