Novell LINUX ENTERPRISE DESKTOP 10 SP2 - DEPLOYMENT GUIDE 08-05-2008 Deployment Manual page 621

shorthand notation is shown in
all three lines represent the same address.
Example 30.3 Sample IPv6 Address
fe80 : 0000 : 0000 : 0000 : 0000 : 10 : 1000 : 1a4
fe80 : 0 : 0 :
fe80 :
Each part of an IPv6 address has a defined function. The first bytes form the prefix and
specify the type of address. The center part is the network portion of the address, but
it may be unused. The end of the address forms the host part. With IPv6, the netmask
is defined by indicating the length of the prefix after a slash at the end of the address.
An address, as shown in
(page 605), contains the information that the first 64 bits form the network part of the
address and the last 64 form its host part. In other words, the 64 means that the netmask
is filled with 64 1-bit values from the left. Just like with IPv4, the IP address is combined
with AND with the values from the netmask to determine whether the host is located
in the same subnetwork or in another one.
Example 30.4 IPv6 Address Specifying the Prefix Length
fe80::10:1000:1a4/64
IPv6 knows about several predefined types of prefixes. Some of these are shown in
Table 30.4, "Various IPv6 Prefixes"
Table 30.4 Various IPv6 Prefixes
Prefix (hex) Definition
IPv4 addresses and IPv4 over IPv6 compatibility addresses. These
00
are used to maintain compatibility with IPv4. Their use still re-
quires a router able to translate IPv6 packets into IPv4 packets.
Several special addresses, such as the one for the loopback device,
have this prefix as well.
2 or 3 as the first Aggregatable global unicast addresses. As is the case with IPv4,
digit an interface can be assigned to form part of a certain subnetwork.
Currently, there are the following address spaces: 2001::/16
(production quality address space) and 2002::/16 (6to4 address
space).
Example 30.3, "Sample IPv6 Address"
0 : 0 : 10 : 1000 : 1a4
: 10 : 1000 : 1a4
Example 30.4, "IPv6 Address Specifying the Prefix Length"
(page 605).
(page 605), where
Basic Networking 605