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Date: Tue, 30 Oct 2001 00:07:51 +0100 (CET)
From: =?iso-8859-1?q?willy=20tarreau?= <wtarreau@yahoo.fr>
Subject: Re: Ethernet NIC dual homing
To: Christopher Friesen <cfriesen@nortelnetworks.com>
Cc: linux-kernel@vger.kernel.org
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> Are there issues with using MII to detect link
> state?  I thought it was fairly reliable...

no, there are examples with too long lines, or
scratched wires where the links stay up, but even arp
doesn't work.

> How are you using arp packets to detect if the link
> is up?  Sending it out to your own MAC address?

no, simply sending ARP request for a known IP address
which will reply, so generate traffic that can be
counted to tell wether a NIC seems working or not.

I didn't try to set my own IP address though. Perhaps
with arp_filter properly set this could be usefull...

Regards,
Willy


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