Configuration Guide
Table Of Contents
- Notice
- Documentation disclaimer
- Link disclaimer
- Warranty
- Hosted Service
- Licenses
- License type(s)
- Copyright
- Virtualization
- Third Party Components
- Service Provider
- Compliance with Laws
- Preventing Toll Fraud
- Security Vulnerabilities
- Downloading Documentation
- Contact Extreme Networks Support
- Contact Avaya Support
- Trademarks
- Figures
- Tables
- 1. Overview
- 2. Supported Topologies and Releases
- 2.1 Single Layer 2 Switch
- 2.2 Centralized Layer 3 Stackable Switch
- 2.3 Single Layer 3 Modular Switch
- 2.4 Switch Clustering Topologies
- 2.4.1 Switch Clustering – Topology 1
- 2.4.2 Switch Clustering – Topology 2
- 2.4.3 Switch Clustering – Topology 3
- 2.4.4 Switch Clustering – Topology 4
- 2.4.5 Switch Clustering – Topology 5
- 2.4.6 Switch Clustering Configuration Examples
- 3. Appendix
- 4. Software Baseline
- 5. Reference Documentation
©2020 Extreme Networks, Inc. All rights reserved
November 2020
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1. Overview
Network Load Balancing is a clustering technology available with Microsoft Windows 2000 / Windows
2003 Server family of operating systems. Network Load Balancing uses a distributed algorithm to load
balance TCP/IP network traffic across a number of hosts, enhancing the scalability and availability of
mission critical, IP based services, such as Web, VPN, Streaming Media, Firewalls, etc. Network Load
Balancing also provides high availability by detecting host failures and automatically redistributing traffic
to remaining operational hosts.
Figure 1-1 – Network Load Balancing Cluster
With Network Load Balancing, each host runs separate copies of the desired server applications, such as
Web Server, FTP Server, or ISA Firewall. Network Load Balancing distributes incoming client requests to
the hosts in the cluster group. The load weight to be handled by each host can be configured by the
administrator and hosts can be dynamically added or removed from the cluster as necessary. In addition,
Network Load Balancing can direct all traffic to a designated single host, called the default host.
Figure 1-2 – Example Network Load Balancing Cluster