Prefix+Lists


 * matches an IP route
 * route prefix (subnet)
 * prefix length (mask)
 * redistribute cannot reference prefis-list, but remote-map can act as a middle-man between them

=**Prefix List Params**=
 * none - conf-len = route-len
 * le - conf-len <= route-len <= le-value
 * ge - ge-value <= route-len <= 32
 * ge & le - ge-value <= route-len <= le-value