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carp: document the new VRRPv3 support
Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D44776
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@ -25,7 +25,7 @@
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd November 08, 2023
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.Dd May 1, 2024
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.Dt IFCONFIG 8
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.Os
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.Sh NAME
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@ -3151,6 +3151,20 @@ announcements to.
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Restore the default destination address for (IPv4)
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.Xr carp 4
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announcements, which is ff02::12.
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.It Cm carpver
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Set the protocol version.
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Valid choices are 2 (for
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.Xr carp 4)
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and 3 (for VRRPv3).
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This can only be set when
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.Xr carp 4
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is initiated.
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.It Cm vrrpprio
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Set the VRRPv3 priority.
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Valid values are 1-255.
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.It Cm vrrpinterval
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Set the VRRPv3 Master Advertisement Interval.
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Values are in centiseconds.
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.El
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.Sh ENVIRONMENT
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The following environment variables affect the execution of
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@ -24,7 +24,7 @@
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd March 6, 2023
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.Dd April 12, 2024
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.Dt CARP 4
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.Os
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.Sh NAME
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@ -93,6 +93,17 @@ or through the
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.Dv SIOCSPEER
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.Xr ioctl 2 .
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.Pp
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.Xr carp 4
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can be configured to use either the non-standard CARP protocol, or VRRPv3 (RFC 5798).
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Use the
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.Cm carpver
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parameter to select either 2 (CARP) or 3 (VRRPv3).
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VRRPv3 specific parameters can be configured using the
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.Cm vrrpprio
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and
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.Cm vrrpinterval
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parameters.
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.Pp
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CARP virtual hosts can be configured on multicast-capable interfaces: Ethernet,
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layer 2 VLAN, FDDI and Token Ring.
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An arbitrary number of virtual host IDs can be configured on an interface.
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