[ppml] Policy to help the little guys
danny at tcb.net
Wed Mar 19 14:48:40 EDT 2008
On Mar 19, 2008, at 12:34 PM, David Williamson wrote:
> PI isn't the problem for DFZ costs, deaggregation is. The latter,
> however, is going to be of increasing interest as space gets tight and
> the entwork continues to grow. If nothing else, it allows more
> efficient allocations to be made.
Although if it's not PA and aggregated and instead PI with
multi-homing then the impact to the routing system grows
super-linearly as a factor of both number of multi-homing
instances and routing system interconnection denseness.
That is, while the sum of unique FIB entries may not
increase, the existence of more unique paths and more
churn require more FIB IO, processor memory, CPU, etc..
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