Ipv6 Address Formats - Cisco Nexus 7000 Series Configuration Manual

Information About IPv6
S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m .
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IPv6 Address Formats

An IPv6 address has 128 bits or 16 bytes. The address is divided into eight, 16-bit hexadecimal blocks
separated by colons (:) in the format: x:x:x:x:x:x:x:x. Two examples of IPv6 addresses are as follows:
2001:0DB8:7654:3210:FEDC:BA98:7654:3210
2001:0DB8:0:0:8:800:200C:417A
IPv6 addresses contain consecutive zeros within the address. You can use two colons (::) at the
beginning, middle, or end of an IPv6 address to replace the consecutive zeros.
compressed IPv6 address formats.
You can use two colons (::) only once in an IPv6 address to replace the longest string of consecutive
Note
zeros within the address.
You can use a double colon as part of the IPv6 address when consecutive 16-bit values are denoted as
zero. You can configure multiple IPv6 addresses per interface but only one link-local address.
The hexadecimal letters in IPv6 addresses are not case sensitive.
Table 3-1
IPv6 Address Type
Unicast
Multicast
Loopback
Unspecified
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
3-2
IPv6 Unicast Addresses, page 3-3
IPv6 Anycast Addresses, page 3-7
IPv6 Multicast Addresses, page 3-7
IPv4 Packet Header, page 3-9
Simplified IPv6 Packet Header, page 3-9
DNS for IPv6, page 3-12
Path MTU Discovery for IPv6, page 3-12
CDP IPv6 Address Support, page 3-12
ICMP for IPv6, page 3-12
IPv6 Neighbor Discovery, page 3-13
IPv6 Neighbor Solicitation Message, page 3-13
IPv6 Router Advertisement Message, page 3-15
IPv6 Neighbor Redirect Message, page 3-16
Virtualization Support, page 3-17
Compressed IPv6 Address Formats
Preferred Format
2001:0:0:0:0DB8:800:200C:417A
FF01:0:0:0:0:0:0:101
0:0:0:0:0:0:0:0:1
0:0:0:0:0:0:0:0:0
Chapter 3 Configuring IPv6
Table 3-1 shows a list of
Compressed Format
2001::0DB8:800:200C:417A
FF01::101
::1
::
OL-20002-02