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SubjectRE: Ethernet NIC dual homing
> Hi,
> Does someone know if there is some work in the area of NIC
> dual homing ?
> By NIC dual homing, I mean two network devices (e.g.
> Ethernet) that are
> connected to the same IP subnet but only one is active (at IP
> level) at a
> time.

Intel eepro100 cards, using Intel drivers (e100) and the ANS subsystem
(all available from Intel for free - as in beer) allow this
at the kernel-level, using link-detection to determine whether
to fail over.
They allow for failover, dual-active (only when sending) and Fast

Generally speaking, it shouldn't be hard to do it.
A shell script would be inefficient computation-wise, but should be simple
quite reliable: arping your default gateway and if it fails more than
X times ifconfig down; ifconfig up.

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