Dual Stack Overview; Introduction To Ipv6 Neighbor Discovery Protocol - H3C S5500-SI Series Operation Manual

Operation Manual – IPv6 Configuration
H3C S5500-SI Series Ethernet Switches
MAC address:
Represented in binary:
Insert FFFE :
Set U/L bit:
EUI-64 address:
Figure 1-2 Convert a MAC address into an EUI-64 address

1.1.3 Dual Stack Overview

A network node that supports both IPv4 and IPv6 is called a dual stack node. A dual
stack node configured with an IPv4 and an IPv6 addresses can have both IPv4 and
IPv6 packets transmitted.
For an upper layer application supporting both IPv4 and IPv6, either TCP or UDP can
be selected at the transport layer, while at network layer, IPv6 stack is peferred. Figure
1-3 illustrates the IPv4/IPv6 dual stack in relation to the IPv4 stack.
IPv4 application
TCP
IPv4
Protocol ID :
0x0800
Figure 1-3 IPv4/IPv6 dual stack in relation to IPv4 Stac

1.1.4 Introduction to IPv6 Neighbor Discovery Protocol

The IPv6 neighbor discovery protocol (NDP) uses five types of ICMPv6 messages to
implement the following functions:
Address resolution
Neighbor unreachability detection
Duplicate address detection
Router/prefix discovery and address autoconfiguration
Redirection
Table 1-3 lists the types and functions of ICMPv6 messages used by the NDP.
00000000 00010010 00110100 00000000 101
00000000 00010010 00110100 11111111 11111110 0000
00000010 00010010 00110100 11111111 11111110 0000
UDP
Ethernet
IPv4 stack
0012-3400-ABCD
01011 11001101
0000 10101011 11001101
0000 10101011 11001101
0212:34FF:FE00:ABCD
IPv4/IPv6 application
TCP UDP
IPv4 IPv6
Protocol ID :
Protoc ol ID :
0x86DD
0x0800
Ethernet
Dual stack
1-7
Chapter 1 IPv6 Configuration
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