Message-ID: <509147AC.8030105@arcor.de>
Date: Wed, 31 Oct 2012 16:45:48 +0100
From: Der Tiger <der.tiger.alpine@arcor.de>
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To: "alpine-devel@lists.alpinelinux.org" <alpine-devel@lists.alpinelinux.org>
Subject: [alpine-devel] [Alpine 2.4] Network Interface Hotplugging Detection
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It seems Alpine does not detect link up and down events on NICs.

My Alpine system has two NICs (Intel and RealTek) installed, which both
work fine as long as the link stays up. If I disconnect one of the
cables, the link goes down, as can be expected. Once the cable is
reconnected, the link stays down and dhcpcd won't renew the ip address
from an external DHCP server, even if I manually trigger a renew. Alpine
therefore ignores any link state changes.

AFAIK, link up and down events are usually handled by daemons like
ifplugd (http://linux.die.net/man/8/ifplugd), netplugd
(http://linux.die.net/man/8/netplugd) or hotplug
(http://linux.die.net/man/8/hotplug). Unfortunately I cannot find any of
those tools available as installable package for Alpine.

Is there any other way Alpine is supposed to handle link up and down
events (e.g. directly by the kernel)?

Does link event handling on Alpine require a certain configuration
(apart from /etc/network/interfaces) in order to work properly?

If, at this stage, Alpine doesn't handle link up and down events on NICs
at all, I will gladly contribute one of the utilities mentioned above as
installable package. On the other hand, if there is a solution allready
in place, which is just not configured properly on my system, I'd rather
use the solution available than create a redundant package.

Thank you for your input!

Regards, Tiger



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