Routing TCP/IP, Volume I (CCIE Professional Development)

Principles of Redistribution

The capabilities of the IP routing protocols vary widely. The protocol characteristics that have the most bearing on redistribution are the differences in metrics and administrative distances, and each protocol's classful or classless capabilities. Failure to give careful consideration to these differences when redistributing can lead to, at best, a failure to exchange some or all routes or, at worst, routing loops and black holes.

Metrics

The routers of Figure 11.1 are redistributing static routes into OSPF, which then advertises the routes to other OSPF-speaking routers. Static routes have no metric associated with them, but every OSPF route must have a cost. Another example of conflicting metrics is the redistribution ...