Default Router Preferences and More-Specific Routes
- R. Draves ,
- D. Thaler ,
- Dave Thaler
RFC 4191
This document describes an optional extension to Router Advertisement messages for communicating default router preferences and more- specific routes from routers to hosts. This improves the ability of hosts to pick an appropriate router, especially when the host is multi-homed and the routers are on different links. The preference values and specific routes advertised to hosts require administrative configuration; they are not automatically derived from routing tables.