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Date: Fri, 18 Sep 2026 15:12:25 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Nicolai Buchwitz <nb@tipi-net.de>
Cc: Ovidiu Panait <ovidiu.panait.rb@renesas.com>, andrew+netdev@lunn.ch,
 davem@davemloft.net, edumazet@google.com, pabeni@redhat.com,
 shuah@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
 linux-kselftest@vger.kernel.org
Subject: Re: [PATCH net-next v2 3/3] selftests: drv-net: Add VLAN test
Message-ID: <20260918151225.304410cf@kernel.org>
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References: <20260918112529.96039-1-ovidiu.panait.rb@renesas.com>
	<20260918112529.96039-4-ovidiu.panait.rb@renesas.com>
	<5be2136e4142427285566f01d95c1b7b@tipi-net.de>
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On Fri, 18 Sep 2026 14:04:13 +0200 Nicolai Buchwitz wrote:
> > +LOCAL_IP = os.environ.get("VLAN_LOCAL_V4", "198.51.100.1")
> > +REMOTE_IP = os.environ.get("VLAN_REMOTE_V4", "198.51.100.2")  
> 
>    LOCAL_IP = "198.51.100.1"
>    REMOTE_IP = "198.51.100.2"

LOCAL_IP / REMOTE_IP are in the default network segment (vlan 0)
Here we need some "unused" IP subnet that we can assign without
conflicts. Getting it from the config would indeed be good, but
since this is the first use perhaps we should defer until it actually
bothers someone?

Or am I missing something?