From 05199e7e333b0d232f4b2a5ef0e54700e1a5e1d2 Mon Sep 17 00:00:00 2001 From: Martin Weinelt Date: Fri, 11 Jun 2021 00:08:24 +0200 Subject: [PATCH] docs: expand on multicast improvements in v2021.1 I mixed up two separate improvements into one, this change aims to clarify them based on a suggestion and conversation with @T-X. --- docs/releases/v2021.1.rst | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/docs/releases/v2021.1.rst b/docs/releases/v2021.1.rst index ad0fb094..3927f5bf 100644 --- a/docs/releases/v2021.1.rst +++ b/docs/releases/v2021.1.rst @@ -57,8 +57,9 @@ Major changes Multicast optimizations (batman-adv) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -In this release, we reenable the multicast optimizations, that have gone through another round of bug squashing upstream. This reduces layer 2 overhead, especially for IPv6 neighbor discovery, because multicast traffic will be converted to unicast traffic when the number of subscribers does not exceed 16. This is beneficial as we would previously drop multicast traffic that wasn't explicitly allowed but now can allow multicast traffic if it wouldn't result in broadcast. +In this release, we reenable the multicast optimizations, that have gone through another round of bug squashing upstream. With this feature batman-adv will distribute IPv6 link-local multicast packets via individual unicast packets instead of flooding them through the whole mesh as long as the number of subscribed nodes does not exceed 16. This reduces layer 2 overhead, especially for IPv6 Neighbor Discovery. +We also relaxed the firewall for IPv6 multicast packets: Instead of always dropping non-essential multicast packets we now allow all IPv6 link-local multicast packets to pass when the destination group has up to 16 subscribers Status page ~~~~~~~~~~~