From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hangbin Liu Subject: [PATCH net-next] igmp: Document sysctl force_igmp_version Date: Mon, 7 Nov 2016 14:51:23 +0800 Message-ID: <1478501483-6047-1-git-send-email-liuhangbin@gmail.com> Cc: Hannes Frederic Sowa , Daniel Borkmann , Hangbin Liu To: netdev@vger.kernel.org Return-path: Received: from mail-pf0-f194.google.com ([209.85.192.194]:34365 "EHLO mail-pf0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751226AbcKGGvg (ORCPT ); Mon, 7 Nov 2016 01:51:36 -0500 Received: by mail-pf0-f194.google.com with SMTP id y68so15329243pfb.1 for ; Sun, 06 Nov 2016 22:51:36 -0800 (PST) Sender: netdev-owner@vger.kernel.org List-ID: There is some difference between force_igmp_version and force_mld_version. Add document to make users aware of this. Signed-off-by: Hangbin Liu --- Documentation/networking/ip-sysctl.txt | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index 3db8c67..5af48dd 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -967,6 +967,21 @@ igmp_qrv - INTEGER Default: 2 (as specified by RFC2236 8.1) Minimum: 1 (as specified by RFC6636 4.5) +force_igmp_version - INTEGER + 0 - (default) No enforcement of a IGMP version, IGMPv1/v2 fallback + allowed. Will back to IGMPv3 mode again if all IGMPv1/v2 Querier + Present timer expires. + 1 - Enforce to use IGMP version 1. Will also reply IGMPv1 report if + receive IGMPv2/v3 query. + 2 - Enforce to use IGMP version 2. Will fallback to IGMPv1 if receive + IGMPv1 query message. Will reply report if receive IGMPv3 query. + 3 - Enforce to use IGMP version 3. The same react with default 0. + + Note: this is not the same with force_mld_version because IGMPv3 RFC3376 + Security Considerations does not have clear description that we could + ignore other version messages completely as MLDv2 RFC3810. So make + this value as default 0 is recommended. + conf/interface/* changes special settings per interface (where "interface" is the name of your network interface) -- 2.5.5