IPv6 sub netting
is little different than IPv4 sub netting.
Let’s take small example
to understand about IPv6 sub netting.
2000: 4567
:7896/48 , The first 48 bits represents the NETWORK address and Next
16 bits used for Subnetting and Last 64 bits are Host bits.
2000: 4567:
7896: XXXX : 3456: 7895: 1233: 9876
The Number of sub
nets are (2^16) =65536 and each sub-net will have 2^64 hosts can be
connected.
The Sub-net
addresses are shown below.
2000: 4567:
7896: 0000:
2000: 4567:
7896: 0001:
2000: 4567:
7896: 0002:
|
|
|
|
2000: 4567:
7896: FFFF:
21DA: D3: 0:
2F3B: 2AA: FF: FE28: 9C5A/59 ->59 bits represents the Network
Address, remaining 5 bits represents the subnet, so total of subnets
are 2^5 = 32 and 64 Bits represents the Host Address.
21DA:
D3: 0: 2F3 B: 2AA:FF:FE28:9C5A/59
21DA: D3:
0: 2F 0010 0000 => 21DA: D3: 0: 2F20 is the Subnet
Identifier
-=================================
Types of IPv6
Addresses in represented in Tabular format
Address
type Binary prefix IPv6 notation
Unspecified 00 .
. . 0 (128 bits) ::/128
Loopback 00 . . .
1 (128 bits) ::1/128
Multicast 11111111 FF00::/8
Link-local
unicast 1111111010 FE80::/10
Site-local
unicast 1111111011 FEC0::/10
Global
unicast (2000::/3 - E000::/3)
A global unicast
address is simply what we call a public IP address in IPv4—that is,
an IP address that is routed across the whole Internet.
You can make out
a global unicast address easily: The first three bits are set to 001.
Thus, the address prefix of a global IPv6 address is 2000::/3 because
0010000000000000 is 2000 in hex.
Table Examples
of well-known IPv6 multicast addresses.
Address
Multicast
GroupFF02::1
All NodesFF02::2
All
RoutersFF02::5
OSPFv3
RoutersFF02::6
OSPFv3 Designated
RoutersFF02::9
RIPng
RoutersFF02::A
EIGRP
RoutersFF02::B
Mobile
AgentsFF02::C
DHCP
Servers/Relay AgentsFF02::D
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