netdev - Re: Unable to create ip alias on bridge interface

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Date:   Tue, 29 May 2018 16:11:39 +0530
From:   Akshat Kakkar <akshat.1984@...il.com>
To:     Michal Kubecek <mkubecek@...e.cz>
Cc:     netdev <netdev@...r.kernel.org>
Subject: Re: Unable to create ip alias on bridge interface

Thanks.
Thanks a lot for clarifying all this.

On Tue, May 29, 2018 at 3:59 PM, Michal Kubecek <mkubecek@...e.cz> wrote:
> On Tue, May 29, 2018 at 03:39:05PM +0530, Akshat Kakkar wrote:
>> For following commands,
>>   ip addr add 10.10.10.1/24 brd +  dev br0
>>   ip addr add 10.10.10.2/24 brd +  dev br0
>>   ip addr add 20.20.20.1/24 brd +  dev br0
>>   ip addr add 20.20.20.2/24 brd +  dev br0
>>
>> Both 10.10.10.1 and 20.20.20.1 becomes primary. Which one will be used
>> as source IP?
>>
>> Is it nextHop of route that will decide?
>
> Unless you have an unusual routing setup, yes. When unsure, you can use
> "ip route get ..." which should tell you which route and which source
> address will be used.
>
>> And what about communication in local subnet, say ping to 10.10.10.200
>> and 20.20.20.200? Will source for both will change according to
>> destination IP?
>
> This is the same. Under "normal" circumstances, 10.10.10.1 will be used
> for targets from 10.10.10.0/24 and 20.20.20.1 for targets from
> 20.20.20.0/24.
>
> Michal Kubecek