68
IPv6 Configuration
Wh n configuring IPv6, go to thes
e
e sections for information you are interested in:
z
IPv6 Overview
IPv6 Configuration Task List
z
ration Example
z
IPv6 Configu
IPv6
Engineering Task Force (IETF) as the successor to Internet Protocol Version 4 (IPv4). The significant
tween IPv6 and IPv4 is that IPv6 increases the IP address size from 32 bits to 128 bits.
IPv6
Header for
e IPv6 address size is four times that of IPv4 addresses,
he Options field). For the
Overview
Internet Protocol Version 6 (IPv6), also called IP next generation (IPng), was designed by the Internet
difference be
Features
mat simplification
IPv6 cuts down some IPv4 header fields or moves them to extension headers to reduce the overhead of
the basic IPv6 header. IPv6 uses a fixed-length header, thus making IPv6 packet handling simple and
improving the forwarding efficiency. Although th
the size of the IPv6 header is only twice that of the IPv4 header (excluding t
specific IPv6 header format, see
Figure 68-1
.
Figure 68-1
Comparison between IPv4 header format and IPv6 header format
Adequate a
address are both 128 bits (16 bytes) long. IPv6 can
provide 3.4 x 10
38
addresses to completely meet the requirements of hierarchical address division as
well as allocation of public and private addresses.
ddress space
The source IPv6 address and the destination IPv6
68-1