netdev - [PATCH iproute2-next 2/2] man: bridge: document per-port mcast

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220316090257.3531111-3-troglobit@gmail.com>
Date:   Wed, 16 Mar 2022 10:02:57 +0100
From:   Joachim Wiberg <troglobit@...il.com>
To:     netdev@...r.kernel.org
Cc:     David Ahern <dsahern@...nel.org>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Nikolay Aleksandrov <razor@...ckwall.org>,
        Joachim Wiberg <troglobit@...il.com>
Subject: [PATCH iproute2-next 2/2] man: bridge: document per-port mcast_router settings

Signed-off-by: Joachim Wiberg <troglobit@...il.com>
---
 man/man8/bridge.8 | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/man/man8/bridge.8 b/man/man8/bridge.8
index 93852ed8..2fa4f3d6 100644
--- a/man/man8/bridge.8
+++ b/man/man8/bridge.8
@@ -47,6 +47,8 @@ bridge \- show / manipulate bridge addresses and devices
 .BR hwmode " { " vepa " | " veb " } ] [ "
 .BR bcast_flood " { " on " | " off " } ] [ "
 .BR mcast_flood " { " on " | " off " } ] [ "
+.BR mcast_router
+.IR MULTICAST_ROUTER " ] ["
 .BR mcast_to_unicast " { " on " | " off " } ] [ "
 .BR neigh_suppress " { " on " | " off " } ] [ "
 .BR vlan_tunnel " { " on " | " off " } ] [ "
@@ -473,6 +475,19 @@ By default this flag is on.
 Controls whether multicast traffic for which there is no MDB entry will be
 flooded towards this given port. By default this flag is on.
 
+.TP
+.BI mcast_router " MULTICAST_ROUTER "
+This flag is almost the same as the per-VLAN flag, see below, except its
+value can only be set in the range 0-2.  The default is
+.B 1
+where the bridge figures out automatically where an IGMP/MLD querier,
+MRDISC capable device, or PIM router, is located.  Setting this flag to
+.B 2
+is useful in cases where the multicast router does not indicate its
+presence in any meaningful way (e.g. older versions of SMCRoute, or
+mrouted), or when there is a need for forwarding both known and unknown
+IP multicast to a secondary/backup router.
+
 .TP
 .BR "mcast_to_unicast on " or " mcast_to_unicast off "
 Controls whether a given port will replicate packets using unicast
-- 
2.25.1