netdev - Re: Why linux keeps connected routes when link goes down

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Message-Id: <20090218.155207.139931991.davem@davemloft.net>
Date:	Wed, 18 Feb 2009 15:52:07 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	homecreate@...t.ru
Cc:	netdev@...r.kernel.org
Subject: Re: Why linux keeps connected routes when link goes down

From: Ханкин Константин <homecreate@...t.ru>
Date: Thu, 19 Feb 2009 02:03:40 +0500

> So the main question is: why linux keeps connected routes when link
> goes down?

Because the IP addresses are still assigned to the interface.

IP addresses are owned by the "host" rather than specific interfaces
under Linux.  So just bringing an interface down does not disable
IP addresses configured to that interface.

If you want all the routes to go away, explicitly delete the IP
addresses.