BIG-IP Link Controller v9.3配置指南

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"F5_BIG-IP_Configuration_Guide_for_the_BIG-IP_Link_Controller_version_93" 本手册详细介绍了F5 BIG-IP Link Controller的产品版本9.3的配置指南。BIG-IP Link Controller是一款由F5 Networks公司开发的网络设备，主要用于管理网络连接和负载均衡。它帮助用户优化网络性能，确保高可用性和安全性。在配置BIG-IP Link Controller时，了解版本9.3的特点至关重要。此版本可能包含特定的增强功能、改进的性能以及对先前版本的bug修复。手册中应包含如何安装、配置和管理设备的步骤，以及如何利用其核心功能，如： 1. **链路聚合和故障切换**：BIG-IP Link Controller允许用户将多个物理网络连接组合成逻辑链路，以提高带宽和冗余。当一个链路出现故障时，系统会自动切换到其他链路，以保持网络的连续性。 2. **负载均衡**：系统可以智能地分配网络流量，确保服务器负载均衡，防止单点故障，提高整体服务可用性。 3. **智能路由**：根据预定义的策略或实时网络状况，动态调整数据包的转发路径，优化网络性能。 4. **iControl接口**：F5的iControl接口提供了API，允许管理员通过编程方式控制BIG-IP设备，实现自动化配置和监控。 5. **安全特性**：如SYNCheck技术，用于防止SYN洪水攻击，保护网络不受DoS（拒绝服务）攻击。 6. **应用加速**：BIG-IP可能包括WebAccelerator功能，能够缓存内容、压缩数据和优化TCP连接，从而提升应用的响应速度。 7. **多租户管理**：对于大型企业或云服务提供商，支持多个独立的客户环境，每个环境有自己的配置和策略。 8. **设备管理和监控**：提供详细的日志记录、警报和报告功能，帮助管理员监控系统状态，及时发现并解决问题。 9. **用户认证和访问控制**：如FirePass功能，可以实现对不同用户的访问控制和身份验证，确保只有授权用户能访问网络资源。 10. **持续更新和支持**：F5 Networks通常会在新的版本中提供对最新网络标准和技术的支持，以适应不断变化的网络环境。出版日期为2007年4月13日，需要注意的是，尽管该手册针对的是版本9.3，但F5 Networks有权随时更改产品规格而无需预先通知。所有知识产权，包括商标、专利和版权，均属于F5 Networks，除非特定的用户许可协议中另有说明，否则未授予任何隐含的使用权。 F5 BIG-IP Link Controller v9.3配置指南是网络管理员不可或缺的参考资料，它将指导用户充分利用设备的各项功能，实现高效、安全的网络管理。

Table of Contents

xiv

Introducing the Link Controller

Configuration Guide for BIG-IP

Link Controller 1 - 1

Introducing the BIG-IP system

F5 Networks’ BIG-IP® system is a port-based, multilayer switch that

supports virtual local area network (VLAN) technology. Because hosts

within a VLAN can communicate at the data-link layer (Layer 2), a BIG-IP

system reduces the need for routers and IP routing on the network. This in

turn reduces equipment costs and boosts overall network performance. At

the same time, the BIG-IP system’s multilayer capabilities enable the

system to process traffic at other OSI layers. The BIG-IP system can

perform IP routing at Layer 3, as well as manage and secure TCP, UDP, and

other application traffic at Layer 4 through 7. The following software

modules provide comprehensive traffic management and security for all

traffic types. The modules are fully integrated to provide efficient solutions

to meet any network, traffic management, and security needs.

◆ BIG-IP

Local Traffic Manager

The BIG-IP system includes local traffic management features that help

you make the most of network resources such as web servers. Using the

powerful Configuration utility, you can customize the way that the

BIG-IP system processes specific types of protocol and application

traffic. By using features such as virtual servers, server pools, profiles,

and iRules

, you ensure that traffic passing through the BIG-IP system

is processed quickly and efficiently, while meeting all of your security

needs. For more information, see the Configuration Guide for BIG-IP

Local Traffic Management.

◆ BIG-IP

Global Traffic Manager

The Global Traffic Manager provides intelligent traffic management to

your globally available network resources. Through the Global Traffic

Manager, you can select from an array of load balancing modes, ensuring

that your clients access the most responsive and robust resources at any

given time. In addition, the Global Traffic Manager provides extensive

monitoring capabilities so the health of any given resource is always

available. For more information, see the Configuration Guide for

BIG-IP

Global Traffic Management.

◆ BIG-IP

Link Controller

The Link Controller seamlessly monitors availability and performance of

multiple WAN connections to intelligently manage bi-directional traffic

flows to a site - providing fault tolerant, optimized Internet access

regardless of connection type or provider. The Link Controller ensures

that traffic is always sent over the best available link to maximize user

performance and minimize bandwidth cost to a data center.

◆ BIG-IP

Application Security Manager

The Application Security Manager provides web application protection

from application-layer attacks. The Application Security Manager

protects Web applications from both generalized and targeted application

layer attacks including buffer overflow, SQL injection, cross-site

scripting, and parameter tampering. For more information, see the

Configuration Guide for the BIG-IP

Application Security Manager.

Chapter 1

1 - 2

Introducing the Link Controller

The Link Controller is a dedicated IP application switch that manages traffic

to and from a site across multiple links, regardless of connection type or

provider. The Link Controller provides granular traffic control for Internet

gateways, allowing you to define how traffic is distributed across links in a

way that meets your business priorities. The Link Controller also

transparently monitors the availability and health of links to optimally direct

traffic across the best available link.

The Link Controller includes the following features:

◆ Dynamic load balancing, based on the following link attributes:

• Total available bandwidth of the link

• The costs of purchased incremental bandwidth segments

• Inbound link capacity and resource limits

• Outbound link capacity and resource limits

◆ Router monitoring, to ensure high availability and continuous uptime

Understanding link load balancing

Link load balancing is defined as managing traffic across multiple Internet

or wide-area network (WAN) gateways. Link load balancing ensures high

availability in the network, and improves the performance of a web site or

data center. Link load balancing provides a method by which an

organization can reliably manage a multi-homed network. A multi-homed

network is composed of one or more data centers that have more than one

link to the Internet.

As enterprises increase their reliance on the Internet for delivering

mission-critical applications and services, using only one link and ISP

provider to access the public network represents a single point of failure.

The Link Controller removes the risk of this single point of failure by

enabling enterprises to control and monitor multiple links for their Internet

connectivity.

The Link Controller:

• Guarantees reliable network connections and eliminates downtime by

detecting any type of connection outage, and transparently directing

traffic away from malfunctioning or unavailable links.

• Distributes traffic to optimize the capacity of each connection by

monitoring line throughput so that links do not become over-saturated.

• Increases site performance. The Link Controller measures and directs

users over the best performing link to increase site response times.

• Directs traffic over the least expensive link. Administrators can define

the price of links and tiered pricing schemes. The BIG-IP Link Controller

can direct traffic to the least expensive connection, lowering bandwidth

costs.

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