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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)



Features of ILB

This section describes the key features of ILB.

ILB Operation Modes

ILB supports stateless DSR and NAT modes of operation for IPv4 and IPv6, in single-legged and dual-legged topologies.

Note - The NAT code path that is implemented in ILB differs from the code path that is implemented in Oracle Solaris' IP Filter feature. Do not use both of these code paths simultaneously.

ILB Algorithms

ILB algorithms control traffic distributions and provide various characteristics for load distribution and server selection. ILB provides the following algorithms for the two modes of operation:

ILB Command-Line Interface

The CLI is located in the /usr/sbin/ilbadm directory. It includes subcommands to configure load-balancing rules, server groups, and health checks. It also includes subcommands to display statistics as well as view configuration details. The subcommands can be divided into two categories:

For a list of ilbadm subcommands, see ILB Command and Subcommands . For more detailed information about ilbadm subcommands, refer to the ilbadm(1M) man page.

ILB Server Monitoring Feature

ILB offers an optional server monitoring feature that can provide server health checks with the following capabilities:

By default, ILB does not perform any health checks. You can specify health checks for each server group when creating a load-balancing rule. You can configure only one health check per load-balancing rule. As long as a virtual service is enabled, the health checks on the server group that is associated with the enabled virtual service start automatically and repeat periodically. The health checks stop as soon as the virtual service is disabled. The previous health check states are not preserved when the virtual service is re-enabled.

When you specify a TCP, UDP, or custom test probe for running a health check, ILB sends a ping probe, by default, to determine if the server is reachable before it sends the specified TCP, UDP, or custom test probe to the server. The ping probe is a method of monitoring server health. If the ping probe fails, the corresponding server is disabled with the health check status of unreachable. If the ping probe succeeds, but the TCP, UDP, or custom test probe fails, the server is disabled with the health check status of dead.

Note -

You can configure the health check for the parameters shown in the following table.

Table 26-1 Configuring Health Check Parameters

Health Check Parameters
Specifies the type of health check to be performed.
Initiates a timeout when a health check is not complete.
Specifies the Interval between consecutive health checks.

Note - Intervals are randomized between the following values: 0.5*hc-interval and 1.5*hc-interval.

Specifies the number of consecutive failed checks before a server is considered faulty.

Additional ILB features

This section describes the additional features of the ILB.