:abbr:`RAs (Router advertisements)` are described in RFC 4861. 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
- wwan
.. cfgcmd:: set service router-advert interface <interface> ....
Field | VyOS Option | Description |
---|---|---|
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 |
.. cfgcmd:: set service router-advert interface <interface> prefix 2001:DB8::/32
VyOS Field | Description |
---|---|
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) |
To disable advertisements without deleting the configuration:
.. cfgcmd:: set service router-advert interface <interface> no-send-advert
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
}