Neighbor Discovery Protocol is ...

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<h2>Neighbor Discovery Protocol</h2><div class="wp-caption alignright" style="width: 310px"><a href="http://media.packetlife.net/media/blog/attachments/87/neighbor_solicitation.png" target="_blank"><img title="Neighbor Discovery Protocol" alt="Neighbor Discovery Protocol" src="http://media.packetlife.net/media/blog/attachments/87/neighbor_solicitation.png" width="300" height="270" /></a> </div><div class="wp-caption alignright" style="width: 310px"><a href="http://media.packetlife.net/media/blog/attachments/86/router_solicitation.png" target="_blank"><img title="Neighbor Discovery Protocol" alt="Neighbor Discovery Protocol" src="http://media.packetlife.net/media/blog/attachments/86/router_solicitation.png" width="150" height="135" /></a> </div><div class="wp-caption alignright" style="width: 310px"><a href="http://www.cisco.com/en/US/i/100001-200000/130001-140000/132001-133000/132958.jpg" target="_blank"><img title="Neighbor Discovery Protocol" alt="Neighbor Discovery Protocol" src="http://www.cisco.com/en/US/i/100001-200000/130001-140000/132001-133000/132958.jpg" width="150" height="135" /></a> </div>
<p>The <b>Neighbor Discovery Protocol</b> is a protocol in the Internet Protocol Suite used with Internet Protocol Version 6 (IPv6). It operates in the Link Layer of the Internet model (RFC 1122) and is responsible for address autoconfiguration of nodes, discovery of other nodes on the link, determining the Link Layer addresses of other nodes, duplicate address detection, finding available routers and Domain Name System (DNS) servers, address prefix discovery, and maintaining reachability information about the paths to other active neighbor nodes (RFC 4861).</p>
<p>The protocol defines five different ICMPv6 packet types to perform functions for IPv6 similar to the Address Resolution Protocol and Internet Control Message Protocol (ICMP) Router Discovery and Router Redirect protocols for IPv4. However, it provides many improvements over its IPv4 counterparts (RFC 4861, section 3.1). For example, it includes Neighbor Unreachability Detection (NUD), thus improving robustness of packet delivery in the presence of failing routers or links, or mobile nodes.</p>
<p>The Inverse Neighbor Discovery protocol extension (RFC 3122) allows nodes to determine and advertise an IPv6 address corresponding to a given link-layer address, similar to Inverse ARP for IPv4. The Secure <b>Neighbor Discovery Protocol</b> (SEND) is a security extension of NDP that uses Cryptographically Generated Addresses (CGA) and the Resource Public Key Infrastructure (RPKI) to provide an alternate mechanism for securing NDP with a cryptographic method that is independent of IPsec.</p>
<p>NDP defines five ICMPv6 packet types for the purpose of router solicitation, router advertisement, neighbor solicitation, neighbor advertisement, and network redirects.</p>




















<h3>Related Sites for Neighbor Discovery Protocol</h3>
<ul><li>IPv6 <strong>Neighbor Discovery Protocol</strong> - The Cisco Learning Network <a href="https://learningnetwork.cisco.com/thread/21653" target="_blank">read Neighbor Discovery Protocol</a></li>
<li>RF C4861 <a href="http://tools.ietf.org/html/rfc4861" target="_blank">read Neighbor Discovery Protocol</a></li>
<li>RFC 2461 <a href="http://www.ietf.org/rfc/rfc2461.txt" target="_blank">read Neighbor Discovery Protocol</a></li>
<li>Cisco <strong>Discovery</strong> <strong>Protocol</strong> - Home - BSC CIS Homepage <a href="http://cis.bismarckstate.edu/faculty/frohlich/Cisco%20266/Slides/Cisco%20Discovery%20Protocol.ppt" target="_blank">read Neighbor Discovery Protocol</a></li></ul>




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tags: Neighbor, Discovery, Protocol, Neighbor Discovery Protocol, protocol, discovery, neighbor, address

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