Ipv6 Address Format - Alcatel-Lucent 7705 Configuration Manual

Configuring IP Router Parameters

IPv6 Address Format

IPv6 uses a 128-bit address, as opposed to the IPv4 32-bit address. Unlike IPv4 addresses,
which use the dotted-decimal format, with each octet assigned a decimal value from 0 to 255,
IPv6 addresses use the colon-hexadecimal format X:X:X:X:X:X:X:X, where each X is a
16-bit section of the 128-bit address. For example:
2001:0DB8:0000:0000:0000:0000:0000:0000
Leading zeros can be omitted from each block in the address. A series of zeros can be
replaced with a double colon. For example:
2001:DB8::
The double colon can only be used once in an address.
The IPv6 prefix is the part of the IPv6 address that represents the network identifier. The
network identifier appears at the beginning of the IP address and is made up of the network
address and subnet address. The IPv6 prefix length, which begins with a forward slash (/),
specifies the number of bits in the network identifier; this is similar to the subnet mask in IPv4
addresses. For example, the address 1080:6809:8086:6502::1/64 means that the first 64 bits
of the address represent the network identifier; the remaining 64 bits represent the node
identifier.
The following adapter cards support the full IPv6 subnet range for IPv6 static routes and
interface IP addresses:
For these cards, the supported route range for statically provisioned or dynamically learned
routes is from /1 to /128. Supported interface IP address prefixes are from /4 to /127, and /128
on system or loopback interfaces.
For all other cards, modules, and ports (including the v-port on the 2-port 10GigE (Ethernet)
module), the supported range for statically provisioned or dynamically learned routes is from
/1 to /64 or is /128 (indicating a host route). Supported interface IP address prefixes are from
/4 to /64, and /128 on system or loopback interfaces.
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• 6-port Ethernet 10Gbps Adapter card
• 8-port Gigabit Ethernet Adapter card, version 2 and version 3
• 2-port 10GigE (Ethernet) Adapter card (on the v-port)
• 10-port 1GigE/1-port 10GigE X-Adapter card
7705 SAR OS Router Configuration Guide