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| o The Router Discovery function allows IPv6 hosts to discover the | o The Router Discovery function allows IPv6 hosts to discover the | |
| local routers on an attached link. Router Discovery is described | local routers on an attached link. Router Discovery is described | |
| in Section 6 of RFC 2461 [7]. The main purpose of Router | in Section 6 of RFC 2461 [7]. The main purpose of Router | |
| Discovery is to find neighboring routers that are willing to | Discovery is to find neighboring routers that are willing to | |
| forward packets on behalf of hosts. Prefix discovery involves | forward packets on behalf of hosts. Prefix discovery involves | |
| determining which destinations are directly on a link; this | determining which destinations are directly on a link; this | |
| information is necessary in order to know whether a packet should | information is necessary in order to know whether a packet should | |
| be sent to a router or to the destination node directly. | be sent to a router or to the destination node directly. | |
| o The Redirect function is used for automatically redirecting hosts | o The Redirect function is used for automatically redirecting a host | |
| to an alternate router. Redirect is specified in Section 8 of RFC | to a better first-hop router, or to inform hosts that a | |
| 2461 [7]. It is similar to the ICMPv4 Redirect function [15]. | destination is in fact a neighbor (i.e., on-link). Redirect is | |
| specified in Section 8 of RFC 2461 [7]. It is similar to the | ||
| ICMPv4 Redirect function [15]. | ||
| o Address Autoconfiguration is used for automatically assigning | o Address Autoconfiguration is used for automatically assigning | |
| addresses to a host [8]. This allows hosts to operate without | addresses to a host [8]. This allows hosts to operate without | |
| explicit configuration related to IP connectivity. The Address | explicit configuration related to IP connectivity. The Address | |
| Autoconfiguration mechanism defined in [8] is stateless. To | Autoconfiguration mechanism defined in [8] is stateless. To | |
| create IP addresses, the hosts use any prefix information | create IP addresses, the hosts use any prefix information | |
| delivered to them during Router Discovery, and then test the newly | delivered to them during Router Discovery, and then test the newly | |
| formed addresses for uniqueness. A stateful mechanism, DHCPv6 | formed addresses for uniqueness. A stateful mechanism, DHCPv6 | |
| [24], provides additional Autoconfiguration features. | [24], provides additional Autoconfiguration features. | |