Messages in this thread | | | From | "Chemolli Francesco (USI)" <> | Subject | RE: Ethernet NIC dual homing | Date | Tue, 30 Oct 2001 12:05:17 +0100 |
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> 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 EtherChannel.
Generally speaking, it shouldn't be hard to do it. A shell script would be inefficient computation-wise, but should be simple and quite reliable: arping your default gateway and if it fails more than X times ifconfig down; ifconfig up.
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