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

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Message-ID: <CABDVJk-ce6ifDCTkzgS0R7ZzeZnC0vjfo1D82wYw4gCtCQO-Kw@mail.gmail.com>
Date:   Thu, 2 Apr 2020 09:47:19 +0530
From:   Nagaprabhanjan Bellari <nagp.lists@...il.com>
To:     Anton Danilov <littlesmilingcloud@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: Proxy ARP is getting reset on a VLAN interface

Many thanks! Setting /proc/sys/net/ipv4/conf/default/proxy_arp to 1
has resolved the issue.

-nagp

On Thu, Apr 2, 2020 at 12:45 AM Anton Danilov
<littlesmilingcloud@...il.com> wrote:
>
> 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.