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diff --git a/sbin/ifconfig/ifconfig.8 b/sbin/ifconfig/ifconfig.8
--- a/sbin/ifconfig/ifconfig.8
+++ b/sbin/ifconfig/ifconfig.8
@@ -25,7 +25,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.Dd November 08, 2023
+.Dd April 12, 2024
.Dt IFCONFIG 8
.Os
.Sh NAME
@@ -3150,6 +3150,17 @@
Restore the default destination address for (IPv4)
.Xr carp 4
announcements, which is ff02::12.
+.It Cm carpver
+Set the protocol version.
+Valid choices are 2 (for
+.Xr carp 4)
+and 3 (for VRRPv3).
+.It Cm vrrpprio
+Set the VRRPv3 priority.
+Valid values are 1-255.
+.It Cm vrrpinterval
+Set the VRRPv3 Master Advertisement Interval.
+Values are in centiseconds.
.El
.Sh ENVIRONMENT
The following environment variables affect the execution of
diff --git a/share/man/man4/carp.4 b/share/man/man4/carp.4
--- a/share/man/man4/carp.4
+++ b/share/man/man4/carp.4
@@ -24,7 +24,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.Dd March 6, 2023
+.Dd April 12, 2024
.Dt CARP 4
.Os
.Sh NAME
@@ -93,6 +93,17 @@
.Dv SIOCSPEER
.Xr ioctl 2 .
.Pp
+.Xr carp 4
+can be configured to use either the non-standard CARP protocol, or VRRPv3 (RFC 5798).
+Use the
+.Cm carpver
+parameter to select either 2 (CARP) or 3 (VRRPv3).
+VRRPv3 specific parameters can be configured using the
+.Cm vrrpprio
+and
+.Cm vrrpinterval
+parameters.
+.Pp
CARP virtual hosts can be configured on multicast-capable interfaces: Ethernet,
layer 2 VLAN, FDDI and Token Ring.
An arbitrary number of virtual host IDs can be configured on an interface.

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