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IBM® Domino 10.0.1 Documentation
Welcome to the IBM® Domino 10.0.1 Administrator Help.
Planning
Use this topic as an overview of planning task.
Planning the TCP/IP network
The default TCP/IP configuration for an IBM® Domino® server is one IP address that is globally bound, meaning that the server listens for connections at the IP addresses of all NICs on the computer. Global binding works as long as the computer does not have more than one IP address offering a service over the same assigned TCP port.
IPv6 and Domino®
You can enable IPv6 support in IBM® Domino® for SMTP, POP3, IMAP, LDAP, and HTTP services on IBM AIX®, IBM i, and Linux™ systems.

IBM® Domino 10.0.1 Documentation
Welcome to the IBM® Domino 10.0.1 Administrator Help.
- What's new in IBM® Domino® 10?
  Learn about all of the new features for administrators in IBM® Domino® 10.
- Overview
  Welcome to IBM® Domino® Administrator Help.
- Installing
  Use this documentation to install the IBM® Domino® server and subsequently deploy the IBM Notes® client.
- Planning
  Use this topic as an overview of planning task.
  - Roadmap for deploying Domino® servers
    Use this as a tool when planning how to integrate IBM® Domino® into your existing environment.
  - Planning server-to-server connections
    Servers must connect to each other to exchange data, for example to replicate databases and exchange mail. You can create connections between servers across a local area network (LAN) or wide area network (WAN), by using a pass-through server (a server that acts as an intermediary server between a client and its destination), or over the Internet. Create a Server Connection document whenever you need to establish any new or additional server connections. You can modify this document when necessary.
  - Planning directory services
    IBM® Domino® provides a range of directory service features.
  - Planning a mail routing topology
    IBM® Domino® offers you considerable flexibility in configuring your mail system infrastructure, allowing you to use IBM Notes® routing, SMTP routing, or both, for internal and external messages.
  - Planning a cluster
    When planning a cluster, it is important to consider the performance and ability of your hardware. The cluster must have enough CPU power, memory, and disk space to handle the cluster traffic and the number of databases and replicas required.
  - Planning the TCP/IP network
    The default TCP/IP configuration for an IBM® Domino® server is one IP address that is globally bound, meaning that the server listens for connections at the IP addresses of all NICs on the computer. Global binding works as long as the computer does not have more than one IP address offering a service over the same assigned TCP port.
    - Using Domino® on IBM® i with TCP/IP
      The IBM® Domino® server on IBM i uses TCP/IP to communicate with IBM Notes® clients and the Internet. For the Domino server to work properly, TCP/IP must be set up and active on your system.
    - NRPC name-to-address resolution over TCP/IP
      In the TCP/IP protocol, the method most commonly used to resolve server names to network addresses is the Domain Name System (DNS), an Internet directory service developed both to allow local administrators to create and manage the records that resolve server names to IP addresses and to make those records available globally. While the POP3, IMAP, LDAP, and HTTP services use DNS directly, the NRPC service uses a combination of the Notes® Name Service and DNS to resolve server names to network addresses.
    - Ensuring DNS resolves in TCP protocols
      When you register a new IBM® Domino® server, you specify a common name for it. Within a Domino hierarchical name, the common name is the portion before the leftmost slash. For example, in the name App01/East/Renovations, the common name is App01. The common name, not the hierarchical name, is the name that the Domino server is known by in DNS.
    - Considerations for changing a server IP address
      Changing the IP address of an IBM® Domino® server can cause access issues.
    - IPv6 and Domino®
      You can enable IPv6 support in IBM® Domino® for SMTP, POP3, IMAP, LDAP, and HTTP services on IBM AIX®, IBM i, and Linux™ systems.
      - Using IPv6 address formats with Domino® and Notes®
        You can use an IPv6 address as a string anywhere that an IPv4 address as a string can be used.
      - Installing the IPv6 stack
        To install the IPv6 stack, follow the instructions provided for by your platform's vendor. The instructions in this section contain general guidelines for many platforms, but you need to follow the instructions provided by the manufacturer of your platform.
      - Receiving incoming connections on IPv6 or IPv4 sockets
        UNIX™ platforms receive both IPv4 and IPv6 incoming connections on the same socket. Microsoft™ Windows™ is not capable of receiving both incoming IPv4 and IPv6 connections on the same socket. If IPv6 is disabled, Microsoft Windows only receives IPv4 connections. If IPv6 is enabled and the port is not bound to an address, only IPv6 connections are received. To receive both IPv4 and IPv6 connections, define two ports -- one bound to an IPv4 address and one bound to an IPv6 address. This is easily done for NRPC, but until now, Internet servers only provided support for a single IBM® Notes® port.
      - Examples of using NOTES.INI variables with IPv6
        These examples show how to set NOTES.INI variables to support various platforms and configurations when using IPv6.
      - Connecting a Notes® client to a Domino® server using IPv6
        You can enable IPv^ on Notes® and Domino®.
    - Advanced Domino® TCP/IP configurations
      Domino® servers and partitioned Domino servers can have multiple NICs (network interface cards), each with its own IP address.
  - Planning the NetBIOS network
    The IBM® Domino® network is compatible with NetBIOS, a set of IBM session-layer LAN services that has evolved into a standard interface that applications use to access transport-layer network protocols.
  - Messaging overview
    The IBM® Domino® mail system has three basic components: Domino mail servers, Domino mail files, and mail clients. The Domino mail server is the backbone of an organization's messaging infrastructure, acting both as an Internet mail server and an IBM Notes® mail server. Domino provides standards-based Internet messaging through its support of the Simple Mail Transfer Protocol (SMTP), Post Office Protocol version 3 (POP3), Internet Message Access Protocol (IMAP), and Multipurpose Internet Mail Extensions (MIME). At the same time, Domino supports Notes mail through the use of Notes routing protocols -- Notes remote procedure calls (NRPC) -- and the Notes rich text message format.
  - Planning your Notes® client deployment
    Use the references listed here to plan for, install, upgrade to, and configure the IBM® Notes® client.
  - Planning security
    An important aspect of planning security for your Domino® environment is understanding the tasks and features involved with securing each type of resource.
- Configuring
  Use this information to configure an IBM® Domino® network, users, servers (including Web servers), directory services, security, messaging, widgets and live text, and server clusters. Also use this information to set up IBM iNotes® on a server using Domino Off-Line Services (DOLS).
- Securing
  This section describes IBM® Domino® security features, including execution control lists, IDs, and SSL.
- Administering
  This documentation provides information about the administration tools for managing and monitoring IBM Domino® servers and databases.
- Tuning
  Use this information to improve IBM® Domino® server, Domino Web server, and messaging performance through the use of resource balancing and activity trends, Server.Load commands, advanced database properties, cluster statistics, and the Server Health Monitor.
- Troubleshooting
  This section describes how to find and solve problems with IBM® Domino® server and Administrator client.
- Glossary

IPv6 and Domino®

You can enable IPv6 support in IBM® Domino® for SMTP, POP3, IMAP, LDAP, and HTTP services on IBM® AIX®, IBM® i, and Linux™ systems.

Domino® supports both IPv6 and IPv4. Thus, if an IPv6-enabled Domino® server encounters an IP address in IPv4 format, the Domino® server can still make the connection to that address. When attempting to connect to a server, Domino® tries to resolve all IP addresses for a server until one works. This allows a server to have both an IPv4 address and an IPv6 address. Domino® caches the last successful address for a server and uses only the cached address to quickly search for a server. If you do not want to use only the cached address, enter the NOTES.INI setting DONT_USE_REMEMBERED_ADDRESSES=1.

In DNS, records that store IPv6 addresses are called AAAA records. After you enable IPv6 on a Domino® server and add the server's AAAA record to DNS, another IPv6-enabled Domino® server can connect to it only over IPv6. Servers that don't support IPv6 can run Domino® with IPv6 support disabled, which is the default. These servers can successfully connect to IPv6-enabled Domino® servers only if the DNS for the IPv6 servers contain A records.

Using IPv6 in a Domino® network

For best results when using IPv6 with Domino® servers, set up network devices in the network pathway to connect directly with native IPv6, rather than tunnel through the IPv4 network.

Enabling IPv6 on Notes® and Domino®

To enable IPv6 on Notes® and Domino®, add the setting TCP_ENABLEIPV6=1 to the NOTES.INI file on both the Notes® client and the Domino® server.

How Domino® decides whether to connect over IPv6 or IPv4

A Domino® server evaluates the address format and then, based on that information, makes an IPv4 or an IPv6 connection.

Table 1. Address format and server response
Address format	Server response
IPv4	Makes an IPv4 connection.
IPv4 address mapped to IPv6	Attempts to make an IPv6 connection and waits for the TCP/IP software to make either an IPv6 or IPv4 connection, depending on the remote system's TCP/IP stack.
IPv6	Makes an IPv6 connection.
Server name	Uses DNS to resolve the name: If only an A record is found, connects over IPv4. If only an AAAA record is found, connects over IPv6 or waits for the TCP/IP software to make the connection. If both an A record and AAAA record are found, uses the AAAA record.