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From: David Ahern <dsahern@gmail.com>
To: "netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: why are IPv6 addresses removed on link down
Date: Mon, 12 Jan 2015 22:06:44 -0700	[thread overview]
Message-ID: <54B4A7E4.7030301@gmail.com> (raw)

We noticed that IPv6 addresses are removed on a link down. e.g.,
   ip link set dev eth1


Looking at the code it appears to be this code path in addrconf.c:

         case NETDEV_DOWN:
         case NETDEV_UNREGISTER:
                 /*
                  *      Remove all addresses from this interface.
                  */
                 addrconf_ifdown(dev, event != NETDEV_DOWN);
                 break;

IPv4 addresses are NOT removed on a link down. Is there a particular 
reason IPv6 addresses are?

Thanks,
David

             reply	other threads:[~2015-01-13  5:06 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-13  5:06 David Ahern [this message]
2015-01-13  7:10 ` why are IPv6 addresses removed on link down Stephen Hemminger
2015-01-13 10:35   ` Hannes Frederic Sowa
2015-01-13 11:58     ` YOSHIFUJI Hideaki
2015-01-13 12:15       ` YOSHIFUJI Hideaki
2015-01-13 12:36         ` Hannes Frederic Sowa
2015-01-13 14:53           ` David Ahern
2015-01-13 15:00             ` Hannes Frederic Sowa
2015-01-13 17:05               ` Nicolas Dichtel
2015-01-13 15:00             ` Sowmini Varadhan
2015-01-13 15:09               ` Hannes Frederic Sowa
2015-01-13 15:13                 ` Sowmini Varadhan
2015-01-13 17:25             ` David Miller
2015-01-13 17:34               ` Hannes Frederic Sowa

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