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55.1 IPv6 Overview
This chapter introduces the IPv6 commands of the OLT.
IPv6 (Internet Protocol version 6), is designed to enhance IP address size and features. The increase in
IPv6 address size to 128 bits (from the 32-bit IPv4 address) allows up to 3.4 x 10
of writing, the OLT supports the following features.
• Static address assignment (see
Stateless Autoconfiguration
• Neighbor Discovery Protocol (see
• Remote Management using SNMP, Telnet, and FTP services (see
• ICMPv6 (see
• IPv4/IPv6 dual stack; the OLT can run IPv4 and IPv6 at the same time.
• DHCPv6 client and relay (see
• Multicast Listener Discovery (MLD) snooping and proxy (see
For more information on IPv6 addresses, refer to RFC 2460 and RFC 4291.
55.1.1 IPv6 Addressing
The 128-bit IPv6 address is written as eight 16-bit hexadecimal blocks separated by colons (:). This is an
example IPv6 address
IPv6 addresses can be abbreviated in two ways:
• Leading zeros in a block can be omitted. So
can be written as
• Any number of consecutive blocks of zeros can be replaced by a double colon. A double colon can
only appear once in an IPv6 address. So
be written as
55.1.2 IPv6 Terms
IPv6 Prefix and Prefix Length
Similar to an IPv4 subnet mask, IPv6 uses an address prefix to represent the network address. An IPv6
prefix length specifies how many most significant bits (start from the left) in the address compose the
network address. The prefix length is written as "/x" where x is a number. For example,
2001:db8:1a2b:15::1a2f:0/32
Section 55.1.1 on page
on
page
Neighbor Discovery Protocol (NDP)
ICMPv6
on
page
428)
DHCPv6
2001:0db8:1a2b:0015:0000:0000:1a2f:0000
2001:db8:1a2b:15:0:0:1a2f:0
2001:0db8::1a2f:0000:0000:0015
OLT2406 User's Guide
C
H A P T E R
424) and stateless autoconfiguration (see
427)
on
page
427)
Multicast Listener Discovery
2001:0db8:1a2b:0015:0000:0000:1a2f:0000
.
2001:0db8:0000:0000:1a2f:0000:0000:0015
or
2001:0db8:0000:0000:1a2f::0015
424
IPv6
38
IP addresses. At the time
on
page
428)
Chapter 85 on page
610)
on
.
55
page
429)
can
.
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