-----Original Message-----
From: linux-net-owner@xxxxxxxxxxxxxxx
[mailto:linux-net-owner@xxxxxxxxxxxxxxx] On Behalf Of wk
Sent: Thursday, March 25, 2010 4:56 AM
To: linux-net@xxxxxxxxxxxxxxx
Subject: Multipath route
Hello,
Some time ago we were faced with a problem with multiple network
interfaces in the same subnetwork.
We would like to use several NIC's with IP addresses from the same
subnetwork with link redundancy functionality.
If link redundancy is what you are after, you might want to consider
Ethernet bonding as an alternative. Instead of several network interfaces
each with its own IP address, you get a single virtual interface that you
assign addresses to and the physical interfaces become slaves to that
virtual interface. The bonding code switches the active interface when the
current active interface's link goes down.
See linux/Documentation/networking/bonding.txt in your kernel source tree.
Note there were at one time issues with using IPv6 over bonded interfaces.
I don't know if they have been addressed in newer kernel versions, but for
IPv4 it seems to work fine. Brocade has used it on some of its SAN
products for a few years now.