Re: [PATCH] IGMP: Inhibit reports for local multicast groups

From: Philip Downey <redacted>
Date: Wed, 12 Aug 2015 17:13:53 +0100

IGMP reports are generated for link local multicast groups (224.0.0.1
- 224.0.0.255) used by the routing protocols such as RIP, OSPF etc.
In general routers do not generate reports for local multicast groups.

IGMP reports for local multicast groups can now be inhibited by means
of a system control variable (setting the value to zero).

To retain backwards compatibility the previous behaviour is retained by
default on system boot.

Signed-off-by: Philip Downey <redacted>

I'm always hesitent to apply patches like this.

I can't even understand from your explanation:

1) what about local reporting behavior is so bad

2) why you want to inhibit them at all

For example, this:

In general routers do not generate reports for local multicast groups.

Doesn't tell me anything.  You need to go into more detail about
this, and explain the situation sufficiently.