
Chapter 20
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IPv6 Transition Planning and Strategies 337
router advertisements (RA) for IPv6 will configure and use ISATAP inter-
faces. When an ISATAP machine receives its first unsolicited native RA, it
will deprecate the ISATAP interface in favor of its newly acquired native
v6 interface. In this fashion, ISATAP traffic will automatically give way to
native v6 traffic as additional enterprise routers are configured with v6.
Our example is for a simple enterprise network where all ISATAP hosts use
the same ISATAP router. In a larger enterprise, multiple ISATAP routers
can be deployed, and some scheme of load-balancing DNS can direct dif-
ferent hosts to