1. providing support for asdot+ in an IOS as-path filter
2. allowing a maximum of 3 AS-PATHS into my AS from a NAP
3. Ignore prepends and only count them as a single AS.
In IOS-XR/Juniper terms, I'm trying to replicate the as-path unique-length ge 3 in an IOS as-path.
Doing this in an peer specific inbound route-map is probably easier if your IOS version supports the unique-length option, however this is a valid solution only when you have a few, but not when you have several hundred.