US patent 5473599

Tue Apr 22 10:31:33 UTC 2014

* Nick Hilliard <nick at foobar.org> [2014-04-22 10:29]:
> ... turns 20 today.
> 
> This is the patent which covers hsrp, vrrp, many applications of carp and
> some other vendor-specific standby protocols.

it does NOT cover carp, not at all. carp was carefully designed to
specifically avoid that.

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