netdev - Re: [PATCH net-next v5 0/6] vxlan: allow specifying multiple default destinations

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Message-ID: <20130625141923.5aafd5a4@nehalam.linuxnetplumber.net>
Date:	Tue, 25 Jun 2013 14:19:23 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	Mike Rapoport <mike.rapoport@...ellosystems.com>
Cc:	netdev@...r.kernel.org, David Stevens <dlstevens@...ibm.com>,
	Thomas Graf <tgraf@...g.ch>,
	Cong Wang <xiyou.wangcong@...il.com>
Subject: Re: [PATCH net-next v5 0/6] vxlan: allow specifying multiple
 default destinations

On Tue, 25 Jun 2013 16:01:50 +0300
Mike Rapoport <mike.rapoport@...ellosystems.com> wrote:

> These patches add ability to specify multiple default destinations to
> vxlan. This ability is usefull in cases when multicast are disabled on
> infrastructure level, for instance in public clouds.
> 
> The default destinations list is managed via the fdb entry with
> "00:00:00:00:00:00" MAC address and does not require changes to vxlan
> netlink API.
> 
> The default destinations can be added/deleted using 'bridge fdb'
> commands, e.g:
> 
> # ip link add vxlan0 type vxlan id 23 group 239.1.1.1 dev eth0
> # bridge fdb show dev vxlan0
> 00:00:00:00:00:00 dst 239.1.1.1 self permanent
> 
> # bridge fdb append 00:00:00:00:00:00 dev vxlan0 dst 54.242.49.246
> # bridge fdb append 00:00:00:00:00:00 dev vxlan0 dst 23.22.26.34
> # bridge fdb append 00:00:00:00:00:00 dev vxlan0 dst 184.72.129.120
> # bridge fdb show dev vxlan0
> 00:00:00:00:00:00 dst 239.1.1.1 self permanent
> 00:00:00:00:00:00 dst 54.242.49.246 self permanent
> 00:00:00:00:00:00 dst 23.22.26.34 self permanent
> 00:00:00:00:00:00 dst 184.72.129.120 self permanent
> 
> # bridge fdb delete 00:00:00:00:00:00 dev vxlan0 dst 23.22.26.34
> # bridge fdb append 00:00:00:00:00:00 dev vxlan0 dst 54.242.49.246
> # bridge fdb show dev vxlan0
> 00:00:00:00:00:00 dst 239.1.1.1 self permanent
> 00:00:00:00:00:00 dst 184.72.129.120 self permanent
> 
> Since v5 is complete rework, I've dropped prevoius changelog as not relevant.
> 
I assume iproute changes are no longer needed?


It would be good to have multiple non-default destinations as well.
It would allow for implementing multicast MAC addresses.
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