•Round Robin—This scheme directs traffic to the next server

in the list.

•Hash—This statistically- based scheme is based on a pre-defined algorithm.

•Response Time-based— This scheme directs traffic to the least busy server.

A p p l i c a t i o n 1 — S e r v e r L o a d

B a l a n c i n g

Server load balancing allows you to provide high availability and overcome bottlenecks caused by limitations in the servers.

Configuring mirrored servers via load balancing means that, if one server is taken off-line for any reason, users will not experience any delays or interruptions. You can extend this availability to a number of levels, from servers to server farms to load balancing switches.

Load balancing can also overcome bottlenecks created by “server session overload.” Without load balancing, the number of sessions that the server can handle may become insufficient for all the users who are interacting with your organization.

By intelligently dividing the workload among your servers, you ensure that users can continue to interact in a bottleneck-free environment.

Installing one or more P333R-LB stackable load balancing switches as the server farm switch allows you to easily implement Server load balancing. The server farm appears as a single Virtual IP (VIP) address to the outside world, so you can implement multiple servers for increased throughput and redundancy with no disruption.

Load Balancing Schemes: You can choose the load balancing scheme according to your needs. The P333R-LB offers Round Robin, Hash and Response Time-based schemes.

Persistency. Persistency is important since it ensures that users receive consistent and uninterrupted responses to their requests.

Persistency is especially important in eCommerce where persistency of a session with the same server ensures that transactions between the user and a specific server will not be lost. Persistency ensures that the SSL encryption session will not be cut by moving to a different server. The P333R-LB offers two persistency schemes: Hash, Source/ destination IP-based (and destination Port), and activity timer-based.

Health Checking: In order to make the load balancing more effective in terms of availability, we have incorporated a health checking mechanism into the load balancer that ensures that traffic is only directed to “healthy” servers. This vital component of load balancing is performed by “pinging” the servers and checking for a response.

Graceful Shutdown: This allows you to take down

a server to perform maintenance without your users feeling a thing. Old sessions continue until they are completed, and new sessions are directed to another server. Once all old sessions are completed, you can take down the server.

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Communication without boundaries

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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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