netdev - Re: [PATCH iproute2 net-next 2/2] Enable configuring multicast group join / leave at IP level.

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Date:	Sun, 15 Mar 2015 12:43:17 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	Madhu Challa <challa@...ronetworks.com>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH iproute2 net-next 2/2] Enable configuring multicast
 group join / leave at IP level.

On Wed,  4 Mar 2015 10:30:10 -0800
Madhu Challa <challa@...ronetworks.com> wrote:

> Joining multicast group on ethernet level via "ip maddr" command would
> not work if we have an Ethernet switch that does igmp snooping since
> the switch would not replicate multicast packets on ports that did not
> have IGMP reports for the multicast addresses.
> 
> Linux vxlan interfaces created via "ip link add vxlan" have the group option
> that enables then to do the required join.
> 
> By extending ip address command with option "autojoin" we can get similar
> functionality for openvswitch vxlan interfaces as well as other tunneling
> mechanisms that need to receive multicast traffic.
> 
> example:
> ip address add 224.1.1.10/24 dev eth5 autojoin
> ip address del 224.1.1.10/24 dev eth5

Applied, but please update manual pages as well.
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