IPv6 Routing

IPv6 routing

One of the advantages of IPv6 is to provide flexible routing mechanism. Because allocate IPv4 network ID used way, located on the Internet central request router maintenance large routing tables. These routers must know all the routing, in order to forwarding to the Internet may directional any node packets. Through its polymerization address ability, IPv6 support flexible addressing mode, greatly reduced the routing table size. In this new addressing structure, the median router must only be tracking its network of local part, in order to properly forward this message.

Neighbors discovered

Neighbors found that provide the following some functions:

Routers found. This allows host logo local router.

Address analytical. This allows the node is the corresponding node address next leap analytical link layer address (alternative address analytical protocol [ARP]). Address automatically configured. This allows host automatically configured site - local address and global IP address.

Neighbors found will Internet control message protocol is used for IPv6 (ICMPv6) messages that are include:

Routers advertising. On the basis of pseudo regularly or response router request by routers send. IPv6 routers use routers ads to publish the usability, address prefix and other parameters.

Routers request. By machine to send, used to request on the link router sent out immediately router advertising.

Neighbors request. By the node to send, to address analytical, repeat the address used to identify detection, or whether can still be neighbors visit.

Neighbors advertising. By the node to send, in response to a neighbor's request or notify neighbor link layer address happened in change.

Redirection. By routers send, thus for a send node instructions pointing specific goals better next leap point address.