[c-nsp] ARP Timeout - IP address takeover

[Niels Bakker]

* pauls at nexicom.net (Paul Stewart) [Fri 21 Jan 2005, 10:52 CET]:
> Our mail administrator is implementing a small mail cluster solution
> that involves using IP takeover techniques in case of failure.  So, at
> one moment an IP could belong to one MAC address but if a box fails
> that IP could showup with a different MAC within seconds....

Cisco routers are pretty generous in accepting ARP-related frames.
If the mail server can send a gratuitous ARP reply broadcast for any new
IP address it takes over, the router(s) on that LAN will update their
ARP tables immediately.


	-- Niels.

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