Ruijie RG-S2900G-E Series, Руководство по настройке

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Configuration Guide IPv6 Configuration
IPv6 Configuration
IPv6 Overview
As the Internet is growing rapidly and the IPv4 address space is exhausting, the
limitation of the IPv4 is more obvious. The research and practice of the next
generation of the Internet Protocol becomes popular. Furthermore, the IPng
workgroup of the IETF determines the protocol specification of IPng referred to as
IPv6. Refer to RFC2460 for details.
Key Features of Ipv6:

More Address Space
The length of address will be extended to 128 bits from the 32 bits of Ipv4. Namely,
there are 2^128-1 addresses for IPv6. The IPv6 adopts the hierarchical address mode
and supports multiple-level IP address assignment, for example, from the Internet
backbone network to the internal subnet of enterprises.

Simplified Format of Packet Header
The design principle of new IPv6 packet header is to minimize the overhead. For this
reason, some non-critical fields and optional fields are removed from the packet
header and placed into the extended packet header. The length of the IPv6 address is
4 times of IPv4 address; its packet header is only 2 times of IPv4. The improved IPv6
packet header is more efficient for forwarding, for instance, there is no checksum in
the IPv6 packet header and it is not necessary for the IPv6 router to process the
fragment during forwarding (the fragment is completed by the originator).

High-efficient hierarchical Addressing and Routing Structure
The IPv6 adopts the aggregation mechanism and defines flexible hierarchical
addressing and routing structure, and several networks at the same level is presented
as a unified network prefix at the higher level of routers. So it obviously reduces the
entries that the router must maintain and greatly minimizes the routing and storage
overhead.

Simple Management: Plug and Play
Simplify the management and maintenance of the network node by the
implementation of a series of auto-discovery and auto-configuration functions. Such
as the Neighbor Discovery, the MTU Discovery, the Router Advertisement, the Router
Solicitation and the Auto-configuration technologies provide related service for the
plug and play. It should be mentioned that the IPv6 supports such address
configuration methods as the stateful and the stateless. In the IPv4, the dynamical
host configuration protocol (DHCP) implements the automatic setting of the host IP
address and related configuration, while the IPv6 inherits this auto-configuration