On 4/7/11 8:30 PM, Randy Bush wrote: >>>>> Otherwise some kind of routing must be implemented on hosts. >>>> Some kind of routing is already implemented on hosts. >>> honto??? >> your mobile phone is multihomed, as is this laptop I'm typing on. > > routing != multihomed
it's not an autonomous system it's embedded inside one or more of them... it most definitely makes a forwarding decision which in this case also requires address selection. > try rfc 1812 A router connects to two or more logical interfaces, represented by IP subnets or unnumbered point to point lines (discussed in section [2.2.7]). Thus, it has at least one physical interface. Forwarding an IP datagram generally requires the router to choose the address and relevant interface of the next-hop router or (for the final hop) the destination host. This choice, called relaying or forwarding depends upon a route database within the router. The route database is also called a routing table or forwarding table. The term "router" derives from the process of building this route database; routing protocols and configuration interact in a process called routing. > randy >