From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] ipv4/fib_trie: notify deleted routes on if down event
Date: Wed, 31 Oct 2012 12:36:24 -0400 (EDT)
Message-ID: <20121031.123624.1386289950274931267.davem@davemloft.net>
References: <1351611176-4000-1-git-send-email-nicolas.dichtel@6wind.com>
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From: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Date: Tue, 30 Oct 2012 16:32:56 +0100

> This notification is missing in IPv4 (in IPv6, deleted routes are
> notified).
> 
> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>

This is intentional, and your patch has been suggested before.

Routing daemons are expected to purge their tables of all routes for
an interface when the get the interface down event.