Deviser DS2831 - Page 162

Part IV: System Functions
162
IPv6 Address Setup
The DS2831 is IPv6 compatible. Select IPv6 Setup to
open a dialog window. If you wish to input an address
manually, check Enable ; otherwise, check Auto and
the system will auto-configure the IP. (You will need to
enter the prefix, gateway, and DNS according to your
network configuration – shown, right).
More on IPv6
Where IPv4 uses 32-bit (4-byte) source and destination
addresses, IPv6 has 128 bits (16 bytes). IPv6 addresses
have eight groups, with as many as four hexadecimal
digits in each group (separated by colons).
For example:
2001:0da8:0001:0100:0000:0000:0000:0080
Groups of digits that begin with one or more zeros don’t need to be padded to four places, so you can
shorten this address according to the following rules.
(1) The first zero at the beginning of each group can be omitted. So you can also write this address as:
2001: 0da8 : 0001 : 0100 :0000:0000:0000: 0080
2001: da8 : 1 : 100 :0000:0000:0000: 80
(2) If a group of digits are all zeroes, a single “0” can replace them. So you can also write this address as:
2001:0da8:0001:0100: 0000 : 0000 : 0000 :0080
2001:da8:1:100: 0 : 0 : 0 :80
(3) If a group or continuous groups are all zeroes, the “::” (double colon) notation can replace them. In this
way, you can abbreviate sequential groups of zeros. So you can also write this address as:
2001:da8:1:100: 0 : 0 : 0 :80
2001:da8:1:100::80
Note that you can only use the “::” notation once in an address.
For example, the IPv6 address [2001:250:f004:0000:0000:8e00:0000:ef01] can be rewritten as either of these:
2001:250:f004::8e00: 0 :ef01
2001:250:f004: 0 : 0 :8e00::ef01
IPv6 prefixes are specified similarly to IPv4. As many bits of the prefix as are significant are expressed in the
standard IPv6 notation, followed by a slash and a decimal; the decimal count show how many address
prefixs bits there are.
For example, the prefix of the IPv6 address [2001:250:f004:f001:e150:b95:f71e:ccb6] is 64-bit. You can rewrite
the address as [2001:250:f004:f001:e150:b95:f71e:ccb6/64].