netdev - Re: fib_frontend: Add network specific broadcasts, when it takes a sense

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Date:   Mon, 12 Dec 2016 10:03:39 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     jbenc@...hat.com
Cc:     brandon.philips@...eos.com, netdev@...r.kernel.org, tom@...era.io,
        aaron.levy@...eos.com, bison@...eos.com
Subject: Re: fib_frontend: Add network specific broadcasts, when it takes a
 sense

From: Jiri Benc <jbenc@...hat.com>
Date: Mon, 12 Dec 2016 15:30:35 +0100

> On Fri, 9 Dec 2016 15:41:52 -0800, Brandon Philips wrote:
>> The issue we have: when creating the VXLAN interface and assigning it
>> an address we see a broadcast route being added by the Kernel. For
>> example if we have 10.4.0.0/16 a broadcast route to 10.4.0.0 is
>> created. This route is unwanted because we assign 10.4.0.0 to one of
>> our VXLAN interfaces.
> 
> Are you saying you're trying to assign the IP address 10.4.0.0/16 as a
> unicast address to an interface? Then you'll run into way more problems
> than the one you're describing. You can't have host part of the IP
> address consisting of all zeros (or all ones). Just don't do it. Choose
> a valid IP address instead.

Agreed.