netdev - Re: Proxy ARP is getting reset on a VLAN interface

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Message-ID: <CAEzD07Jsbt=FBAPWwU-Fyzm58DAMaz45vWot3DgdKRRKNGPMWQ@mail.gmail.com>
Date:   Wed, 1 Apr 2020 22:14:51 +0300
From:   Anton Danilov <littlesmilingcloud@...il.com>
To:     Nagaprabhanjan Bellari <nagp.lists@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: Proxy ARP is getting reset on a VLAN interface

The ifdown of vlan interface removes the interface completely.
After ifup (recreating) of vlan interface, this interface inherits the
proxy_arp value from /proc/sys/net/conf/ipv4/default/proxy_arp.


On Wed, 1 Apr 2020 at 21:52, Nagaprabhanjan Bellari
<nagp.lists@...il.com> wrote:
>
> Hi,
>
> I need a small help w.r.t proxy_arp setting on an interface - even if
> I set /sys/net/conf/ipv4/all/proxy_arp to 1, doing a ifdown and an
> ifup on a vlan interface resets the proxy_arp setting.
>
> This does not happen, for example on a physical interface. ifdown/ifup
> "remembers" the setting and applies it properly. I am talking about a
> 3.x kernel.
>
> Can something be done to keep this from happening?
>
> Thanks,
> -nagp



-- 
Anton Danilov.