EIGRP: traffic-share min across-interfaces

Hello Experts,

What is the purpose of EIGRP configuration command:
traffic-share min across-interfaces

If I understand correctly:
If both "variance x" and "traffic-share min" are configured, both routes
(slower and faster) will be installed in the routing table but only faster
route will be used. In theory at least the recovery will be faster. The
reason is that backup route is already in the routing table and will not
have to be inserted in routing table if primary goes down. In other words,
feasible successor will not have to be "moved" from topology table into
routing table.

But in real world how much time does it take to install a route in the
routing table? Just keep in mind that there is no calculations, queries etc.
A microsecond, millisecond ?

Just wondering if Cisco invented this command to save very little on
recovery time or is there something else behind it ?

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Received on Sun Mar 27 2011 - 22:44:50 ART