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commit 9c8f93ea2289fb0ca13f73fa7e3af767fb039d59 Author: Linus L��ssing linus.luessing@c0d3.blue Date: Sun Oct 31 23:51:47 2021 +0000

doc: batman-adv/Multicast-optimizations-tech

9c8f93ea2289fb0ca13f73fa7e3af767fb039d59 batman-adv/Multicast-optimizations-tech.textile | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/batman-adv/Multicast-optimizations-tech.textile b/batman-adv/Multicast-optimizations-tech.textile index f534c53e..4d41a50a 100644 --- a/batman-adv/Multicast-optimizations-tech.textile +++ b/batman-adv/Multicast-optimizations-tech.textile @@ -79,15 +79,17 @@ Example: ff02::1 (all nodes) | (excl. all nodes addr.) |=. supported without bridges��. Example: 224.0.0.251 (mDNS) |=. supported��. Example: ff12::39 (locally administrated) | -| *routable* |=. supported without bridges��. -Example: 239.1.2.3 (locally administrated) |=. supported��. +| *routable* |=. supported��. +Example: 239.1.2.3 (locally administrated) |=. supported�����. Example: ff0e::101 (NTP) |

��: These addresses cannot be considered for optimization towards nodes which have a bridge interface on top of their batman interface as they are not snoopable. See [[multicast-optimizations-flags#BATADV_MCAST_WANT_ALL_UNSNOOPABLES]] for details.

��: In bridged scenarios, an IGMP/MLD querier needs to be present in the mesh. Also, a 3.17 kernel or newer is required.

-��: Routable IPv4 multicast addresses in bridged scenarios are not supported yet. See [[multicast-optimizations-tech#routable-multicast-addresses]] for details. +��: Routable IPv4 multicast addresses in bridged scenarios require a 5.14 kernel or newer and "batman-adv 2021.2":https://www.open-mesh.org/news/104 or newer. Before that only supported without bridges. + +���: With a 5.14 kernel or newer and "batman-adv 2021.2":https://www.open-mesh.org/news/104 or newer proper "MRD":https://www.rfc-editor.org/rfc/rfc4286.html support is used to detect multicast routers. Otherwise with batman-adv v2019.3 until v2021.1 multicast routers are "guessed" by listeners on ff02::2. Which will "overestimate" by including unicast routers without multicast routing, too.

For details on IPv4 and IPv6 multicast address ranges check out this detailed article on "Wikipedia":https://en.wikipedia.org/wiki/Multicast_address.