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System Administration Guide: IP Services     Oracle Solaris 11 Express 11/10
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Document Information


Part I TCP/IP Administration

1.  Planning an IPv4 Addressing Scheme (Tasks)

2.  Planning an IPv6 Addressing Scheme (Overview)

3.  Planning an IPv6 Network (Tasks)

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

5.  Enabling IPv6 on a Network (Tasks)

6.  Administering a TCP/IP Network (Tasks)

7.  Configuring IP Tunnels

8.  Troubleshooting Network Problems (Tasks)

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

10.  IPv6 in Depth (Reference)


11.  About DHCP (Overview)

12.  Planning for DHCP Service (Tasks)

13.  Configuring the DHCP Service (Tasks)

14.  Administering DHCP (Tasks)

15.  Configuring and Administering the DHCP Client

16.  Troubleshooting DHCP (Reference)

17.  DHCP Commands and Files (Reference)

Part III IP Security

18.  IP Security Architecture (Overview)

19.  Configuring IPsec (Tasks)

20.  IP Security Architecture (Reference)

21.  Internet Key Exchange (Overview)

22.  Configuring IKE (Tasks)

23.  Internet Key Exchange (Reference)

24.  IP Filter in Oracle Solaris (Overview)

25.   IP Filter (Tasks)

Part IV Networking Performance

26.  Integrated Load Balancer Overview

ILB Terminology

Features of ILB

ILB Operation Modes

ILB Algorithms

ILB Command-Line Interface

ILB Server Monitoring Feature

Additional ILB features

ILB Processes

Guidelines for Using ILB

ILB and the Service Management Facility

ILB Command and Subcommands

27.  Configuration of Integrated Load Balancer Tasks

28.  Virtual Router Redundancy Protocol (Overview)

29.  VRRP Configuration (Tasks)

30.  Implementing Congestion Control

Part V IP Quality of Service (IPQoS)

31.  Introducing IPQoS (Overview)

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

33.  Creating the IPQoS Configuration File (Tasks)

34.  Starting and Maintaining IPQoS (Tasks)

35.  Using Flow Accounting and Statistics Gathering (Tasks)

36.  IPQoS in Detail (Reference)



ILB Terminology

This section describes some terms that are useful to know when implementing ILB on your systems.

connection draining

A mechanism that provides the capability to prevent new connections to a server that is administratively disabled. This feature is useful for shutting down the servers without disrupting the active connections or sessions. The already existing connections to the server will work normally. After the server is ready to handle the requests, it can be administratively enabled again and the load balancer will forward the new connections to it. ILB provides this capability only for the servers with NAT-based virtual services.

Direct Server Return mode (DSR)

Refers to load-balancing incoming requests to the back-end servers and letting the return traffic from the servers bypass the load balancer by sending them directly to the client. ILB's current implementation of DSR does not provide TCP connection tracking (meaning that it is stateless).



load-balancing algorithm

The algorithm that ILB uses to select a back-end server from a server group for an incoming request.

load-balancing rule

In ILB, a virtual service is represented by a load-balancing rule and is defined by the following parameters:

NAT-based load-balancing

Involves rewriting the IP header information, and handles both the request and the response traffic. There are two types of NAT: half-NAT and full-NAT. Both types rewrite the destination IP address. However, full-NAT also rewrites the source IP address, making it appear to the server that all connections are originating from the load balancer. NAT does provide TCP connection tracking (meaning that it is stateful).



persistent configuration

In the context of ILB, a persistent configuration is a configuration (that is, a set of load-balancing rules) that persists across reboots and package updates.

proxy source

The range of IP addresses that can act as proxies. The range is limited to 10 IP addresses. The proxy source is required only when you have the full NAT implementation.


Consists of a number of packets that come from the same client during a time period, which might have some meaning as a whole.

session persistence

Allows all packets from a client to be sent to the same back-end server. Also known as stickiness. You can setup simple session persistence (that is, source address persistence) for a virtual service by specifying the options pmask=prefix length and persist-timeout=value in seconds. After session persistence is established between a client and a server, all packets from the client to the virtual service are forwarded to the same back-end server as long as the persistence exists. The prefix length in CIDR notation is a value between 0–32 for IPv4 and 0–128 for IPv6.

server group

Consists of zero or more back-end servers and must contain at least one server when it is used for a virtual service. For example, if you want to load balance HTTP requests, you must configure ILB with a server group consisting of one or more back-end servers. ILB will balance the HTTP traffic across the configured set of servers.

server ID

A unique name for the IP address that is assigned by the system when the server is added to a server group.

virtual IP address (VIP)

The IP address for a virtual service.

virtual service

A service that the clients see as VIP:port. For example: Although the service is being handled by a server group potentially consisting of more than one server, the server group appears to clients of the virtual service as a single IP address:port. A single server can be included in more than one server group and hence can serve multiple virtual services. Also, a single server group can service multiple virtual services.