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RE: ISATAP links connect *router* interfaces
> Would that mean that the nodes running ISATAP "as a router"
> would have to run a routing protocol?
It is true that routers perform 1) IP forwarding and
2) next-hop determination through participation in a
routing protocol. For 2), when there can be multiple
IP hops in the path to finding a route out of the site,
a traditional routing protocol (either proactive or
reactive) is necessary. But when there can only be a
single IP hop, ND mechanisms are sufficient.