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System Administration Guide: IP Services     Oracle Solaris 10 8/11 Information Library
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Part I Introducing System Administration: IP Services

1.  Oracle Solaris TCP/IP Protocol Suite (Overview)

Part II TCP/IP Administration

2.  Planning Your TCP/IP Network (Tasks)

3.  Introducing IPv6 (Overview)

4.  Planning an IPv6 Network (Tasks)

5.  Configuring TCP/IP Network Services and IPv4 Addressing (Tasks)

6.  Administering Network Interfaces (Tasks)

7.  Configuring an IPv6 Network (Tasks)

8.  Administering a TCP/IP Network (Tasks)

9.  Troubleshooting Network Problems (Tasks)

10.  TCP/IP and IPv4 in Depth (Reference)

11.  IPv6 in Depth (Reference)

What's New in IPv6 in Depth

IPv6 Addressing Formats Beyond the Basics

6to4-Derived Addresses

6to4-Derived Addressing on a Host

IPv6 Multicast Addresses in Depth

IPv6 Packet Header Format

IPv6 Extension Headers

Dual-Stack Protocols

Oracle Solaris IPv6 Implementation

IPv6 Configuration Files

ndpd.conf Configuration File

IPv6 Interface Configuration File

/etc/inet/ipaddrsel.conf Configuration File

IPv6-Related Commands

ipaddrsel Command

6to4relay Command

ifconfig Command Extensions for IPv6 Support

netstat Command Modifications for IPv6 Support

snoop Command Modifications for IPv6 Support

route Command Modifications for IPv6 Support

ping Command Modifications for IPv6 Support

traceroute Command Modifications for IPv6 Support

IPv6-Related Daemons

in.ndpd Daemon, for Neighbor Discovery

in.ripngd Daemon, for IPv6 Routing

inetd Daemon and IPv6 Services

IPv6 Neighbor Discovery Protocol

ICMP Messages From Neighbor Discovery

Autoconfiguration Process

Obtaining a Router Advertisement

Prefix Configuration Variables

Address Uniqueness

Neighbor Solicitation and Unreachability

Duplicate Address Detection Algorithm

Proxy Advertisements

Inbound Load Balancing

Link-Local Address Change

Comparison of Neighbor Discovery to ARP and Related IPv4 Protocols

IPv6 Routing

Router Advertisement

Router Advertisement Prefixes

Router Advertisement Messages

IPv6 Tunnels

Configured Tunnels

6to4 Automatic Tunnels

Topology of a 6to4 Tunnel

Packet Flow Through the 6to4 Tunnel

Considerations for Tunnels to a 6to4 Relay Router

IPv6 Extensions to Oracle Solaris Name Services

DNS Extensions for IPv6

Changes to the nsswitch.conf File

Changes to Name Service Commands

NFS and RPC IPv6 Support

IPv6 Over ATM Support


12.  About DHCP (Overview)

13.  Planning for DHCP Service (Tasks)

14.  Configuring the DHCP Service (Tasks)

15.  Administering DHCP (Tasks)

16.  Configuring and Administering the DHCP Client

17.  Troubleshooting DHCP (Reference)

18.  DHCP Commands and Files (Reference)

Part IV IP Security

19.  IP Security Architecture (Overview)

20.  Configuring IPsec (Tasks)

21.  IP Security Architecture (Reference)

22.  Internet Key Exchange (Overview)

23.  Configuring IKE (Tasks)

24.  Internet Key Exchange (Reference)

25.  IP Filter in Oracle Solaris (Overview)

26.  IP Filter (Tasks)

Part V Mobile IP

27.  Mobile IP (Overview)

28.  Administering Mobile IP (Tasks)

29.  Mobile IP Files and Commands (Reference)


30.  Introducing IPMP (Overview)

31.  Administering IPMP (Tasks)

Part VII IP Quality of Service (IPQoS)

32.  Introducing IPQoS (Overview)

33.  Planning for an IPQoS-Enabled Network (Tasks)

34.  Creating the IPQoS Configuration File (Tasks)

35.  Starting and Maintaining IPQoS (Tasks)

36.  Using Flow Accounting and Statistics Gathering (Tasks)

37.  IPQoS in Detail (Reference)



IPv6 Addressing Formats Beyond the Basics

Chapter 3, Introducing IPv6 (Overview) introduces the most common IPv6 addressing formats: unicast site address and link-local address. This section includes in-depth explanations of addressing formats that are not covered in detail in Chapter 3, Introducing IPv6 (Overview):

6to4-Derived Addresses

If you plan to configure a 6to4 tunnel from a router or host endpoint, you must advertise the 6to4 site prefix in the /etc/inet/ndpd.conf file on the endpoint system. For an introduction and tasks for configuring 6to4 tunnels, refer to How to Configure a 6to4 Tunnel.

The next figure shows the parts of a 6to4 site prefix.

Figure 11-1 Parts of a 6to4 Site Prefix

image:This figure shows the format of a 6to4 site prefix and shows a site prefix example. The cited tables explain the information in the figure.

The next figure shows the parts of a subnet prefix for a 6to4 site, such as you would include in the ndpd.conf file.

Figure 11-2 Parts of a 6to4 Subnet Prefix

image:This figure shows the format of a 6to4 prefix and shows a prefix example. The following context explains the information in the figure.

This table explains the parts of a 6to4 subnet prefix, their respective lengths, and their definitions.

16 bits
6to4 prefix label 2002 (0x2002).
IPv4 address
32 bits
Unique IPv4 address that is already configured on the 6to4 interface. For the advertisement, you specify the hexadecimal representation of the IPv4 address, rather than the IPv4 dotted-decimal representation.
Subnet ID
16 bits
Subnet ID, which must be a value that is unique for the link at your 6to4 site.

6to4-Derived Addressing on a Host

When an IPv6 host receives the 6to4-derived prefix by way of a router advertisement, the host automatically reconfigures a 6to4-derived address on an interface. The address has the following format:


The output from the ifconfig -a command on a host with a 6to4 interface might resemble the following:

 mtu 1500 index 7
        inet6 2002:8192:56bb:9258:a00:20ff:fea9:4521/64 

In this output, the 6to4-derived address follows inet6.

This table explains the parts of the 6to4-derived address, their lengths and the information they provide.

Address Part
16 bits
2002, which is the 6to4 prefix
32 bits
8192:56bb, which is the IPv4 address, in hexadecimal notation, for the 6to4 pseudo-interface that is configured on the 6to4 router
16 bits
9258, which is the address of the subnet of which this host is a member
64 bits
a00:20ff:fea9:4521, which is the interface ID of the host interface that is configured for 6to4

IPv6 Multicast Addresses in Depth

The IPv6 multicast address provides a method for distributing identical information or services to a defined group of interfaces, called the multicast group. Typically, the interfaces of the multicast group are on different nodes. An interface can belong to any number of multicast groups. Packets sent to the multicast address go to all members of the multicast group. For example, one use of multicast addresses is for broadcasting information, similar to the capability of the IPv4 broadcast address.

The following table shows the format of the multicast address.

Table 11-1 IPv6 Multicast Address Format

8 bits
4 bits
4 bits
8 bits
8 bits
64 bits
32 bits
Network prefix
Group ID

The following is a summary of the contents of each field.

For complete details about the multicast format, refer to RFC 3306, "Unicast-Prefix-based IPv6 Multicast Addresses.

Some IPv6 multicast addresses are permanently assigned by the Internet Assigned Numbers Authority (IANA). Some examples are the All Nodes Multicast Addresses and All Routers Multicast Addresses that are required by all IPv6 hosts and IPv6 routers. IPv6 multicast addresses can also be dynamically allocated. For more information about the proper use of multicast addresses and groups, see RFC 3307, "Allocation Guidelines for IPv6 Multicast Addresses".