Chapter 14 Load Balancing in the P333R-LB

Application Redirection

This section provides information on Application Redirection (AR), and includes a configuration example.

With the importance of the Internet as an organization's source of information, normal operation of the LAN can be negatively impacted by congestion on the network router to the Internet.

Since much of the information retrieved from the Web is either repeatedly requested by a user or requested by multiple users, many organizations implement a local caching mechanism to prevent unnecessary WAN traffic.

The problem with local caches is that they must be on the traffic path between the client and the WAN router. As a result, all traffic, even non-cacheable traffic, passes through the caches.

The P333R-LB’s Application Redirection (AR) redirects packets from their original destination to an alternative server, based on AR configuration. Since redirecting Web requests to local caches is the most common implementation of AR, it is also known as Cache Redirection.

The AR feature can also be used for policy-based (source-based) routing. For full details, see Policy-Based Routing (Source-Based Routing) on page 57.

Benefits

By redirecting client requests to a local cache or application server, you can increase the speed at which clients access the information and free up valuable network bandwidth.

AR for cache redirection provides the following benefits:

•Faster client access to information.

•Increased network bandwidth.

•Policy based routing.

•Only suitable traffic is directed to the local cache.

•Multiple caches can be connected and load-balanced.

•The redirection process is transparent to the client.

•Redundant caches can be configured.

How It Works

To enable AR, locate P333R-LB on the traffic route, instead of the local cache, and redirect packets from their original destination, the WAN access router, to alternative cache servers. The redirection process performs the following:

1Checks whether the packet characteristics complies with one of the defined filter rules. You need to configure rules in order to define which clients/ destinations P333R-LB redirects to the cache applications.

2Routes the packet to the cache server instead of the original destination, the

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P333R-LB specifications

The Avaya P333R-LB is a robust and versatile switch that is part of Avaya's portfolio aimed at enterprise networking solutions. This switch is designed to enhance the performance and scalability of network infrastructure while ensuring high availability and reliability.

One of the main features of the P333R-LB is its Layer 3 switching capability, which allows for efficient routing within an organization's network. This capability is particularly beneficial for organizations with multiple VLANs, as it simplifies the routing process and ensures that data packets are transmitted in the most efficient manner possible.

The P333R-LB is equipped with advanced Quality of Service (QoS) features to prioritize traffic based on the type of application being used. This ensures that critical applications, such as VoIP and video conferencing, receive the necessary bandwidth and low latency required for optimal performance. Additionally, it supports both IPv4 and IPv6 protocols, making it adaptable to a variety of networking environments.

Another important feature of the Avaya P333R-LB is its stackable design. This allows multiple switches to be interconnected, creating a single logical unit. This stacking capability not only simplifies management but also increases overall network capacity and redundancy. In case of a hardware failure, the stack can continue operating without interruption, maintaining network integrity and service continuity.

The switch also integrates advanced security features, including support for MAC filtering, access control lists, and port security. These features help to safeguard network resources from unauthorized access and potential threats. Moreover, the P333R-LB supports 802.1X port-based authentication, which adds an additional layer of security during user access to the network.

The Avaya P333R-LB comes with multiple Gigabit Ethernet ports, allowing for high-speed connectivity to devices such as servers, workstations, and IP phones. This ensures that all devices on the network can communicate effectively, supporting the demands of modern enterprise environments.

For management and monitoring, the P333R-LB offers a user-friendly web interface along with SNMP support, enabling network administrators to easily configure settings and monitor network performance. This simplicity in management is crucial for IT teams that need to ensure optimal network performance while minimizing downtime.

In summary, the Avaya P333R-LB is a feature-rich, scalable, and reliable switch that meets the needs of demanding enterprise networks. With its advanced technologies, QoS support, stackable design, robust security features, and high-speed connectivity options, the P333R-LB is positioned to support a wide range of applications and enhance overall network performance.
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