Re: some musings on PI v. PA

[Seth Mattinen <sethm () rollernet us>]

David Meyer wrote:
>         OTOH, if I announce PI space, "switching to the new path"
>         is controlled by the announcement/withdrawal of the PI
>         prefix, and can happen much closer to the source. So in
>         this sense aggregation breaks a certain kind of "path
>         selection". I think we all realize that there is no free
>         lunch, and that this is a property (such as it is) of the
>         fact that aggregation throws away information in the
> 	interest of computability (a standard technique). 
>
>         So folks are using PI for reasons other than the
>         well-known standard laundry list. In particular,
>         advertising PI space can cause the "switch" to an
>         alternate path during an outage to happen much closer to
>         the source and some providers find this to be a desirable
>         property.
>
>         I am interested in hearing about anyone who is relying on
>         this property of PI, or any other comments on what I've
>         said above.

I always thought that *was* one of the major reasons to use PI space - 
no aggregation of your space into another announcement. Not having to 
renumber is ancillary to me.

~Seth