Date: Mon, 20 Mar 2023 14:14:27 GMT From: Kristof Provost <kp@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: b1a4ccdd8394 - main - carp: document peer/peer6 and mcast/mcast6 in the relevant man pages Message-ID: <202303201414.32KEERiv039873@gitrepo.freebsd.org>
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The branch main has been updated by kp: URL: https://cgit.FreeBSD.org/src/commit/?id=b1a4ccdd839431ff0e5a536a444c6e91f5858527 commit b1a4ccdd839431ff0e5a536a444c6e91f5858527 Author: Kristof Provost <kp@FreeBSD.org> AuthorDate: 2023-03-06 14:02:21 +0000 Commit: Kristof Provost <kp@FreeBSD.org> CommitDate: 2023-03-20 13:37:10 +0000 carp: document peer/peer6 and mcast/mcast6 in the relevant man pages Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D38943 --- sbin/ifconfig/ifconfig.8 | 18 +++++++++++++++++- share/man/man4/carp.4 | 19 ++++++++++++++++++- 2 files changed, 35 insertions(+), 2 deletions(-) diff --git a/sbin/ifconfig/ifconfig.8 b/sbin/ifconfig/ifconfig.8 index 98d2899f1b93..4669e96e28e6 100644 --- a/sbin/ifconfig/ifconfig.8 +++ b/sbin/ifconfig/ifconfig.8 @@ -28,7 +28,7 @@ .\" From: @(#)ifconfig.8 8.3 (Berkeley) 1/5/94 .\" $FreeBSD$ .\" -.Dd February 1, 2023 +.Dd March 6, 2023 .Dt IFCONFIG 8 .Os .Sh NAME @@ -3086,6 +3086,22 @@ The following states are recognized: .Cm MASTER and .Cm BACKUP . +.It Cm peer Ar address +Set the address to send (IPv4) +.Xr carp 4 +announcements to. +.It Cm mcast +Restore the default destination address for (IPv4) +.Xr carp 4 +announcements, which is 224.0.0.18. +.It Cm peer6 Ar address +Set the address to send (IPv6) +.Xr carp 4 +announcements to. +.It Cm mcast6 +Restore the default destination address for (IPv4) +.Xr carp 4 +announcements, which is ff02::12. .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 index 2785b97e76ac..63fa9168dd39 100644 --- a/share/man/man4/carp.4 +++ b/share/man/man4/carp.4 @@ -26,7 +26,7 @@ .\" .\" $FreeBSD$ .\" -.Dd July 1, 2018 +.Dd March 6, 2023 .Dt CARP 4 .Os .Sh NAME @@ -78,6 +78,23 @@ or through the .Dv SIOCSVH .Xr ioctl 2 . .Pp +CARP defaults to using multicast messages, but can be configured to unicast +announcements to peers using the +.Cm peer +and +.Cm peer6 +parameters. Default addresses can be restored using +.Cm mcast +and +.Cm mcast6 . +Note that TTL verification is disabled if the peer address is not a multicast +address. +These values can be configured using +.Xr ifconfig 8 , +or through the +.Dv SIOCSPEER +.Xr ioctl 2 . +.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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