
242 Part Two • IPv6 Protocols
longer addresses. Once those two factors are accommodated by a routing
protocol, IPv6 routing can be accommodated.
14.2 RIP and RIPng
Routing protocols can use two basic methods to measure connectivity
across internetworks, as exemplified by the RIP and OSPF protocols.
We begin with RIP, which uses the distance-vector approach: Routers share
their routing tables and make additions and corrections based on reports
from other routers.
The distance-vector algorithm takes its name from the way routers share
their routing tables. A router expresses each route as a pair of values,
the vector or destination network, and the distance ...