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

[David Miller]

From: Philip Downey <pdowney@xxxxxxxxxxx>
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 <pdowney@xxxxxxxxxxx>

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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/