Server Load Balancing
CLB offers several load balancing methods to distribute traffic across servers, including simple weighted round-robin, random, client address hashing and “least resource” based on agent supplied information. Using a built-in intelligent health check engine that monitors the health of all the servers in the load balancing pool, CLB can seamlessly switch the traffic when there is a server failure.

Deployment Diagram – Server Load Balancing

Celestix CLB is used to provide fail-over and redundancy for many commonly deployed enterprise services, which include:

• Web Applications (Microsoft Sharepoint, Microsoft Outlook Web Access, etc.)

• Security gateways ( Firewalls, SSL VPN, URL filtering, SPAM, Anti-virus, etc.)

• Microsoft Terminal Services

• Servers providing SMTP services

Feature Highlights

• Layer 2 (Ethernet) based software load balancer
• Layer 4 Load Balancing
• Session persistence based on client address and optional source port.
• Backup targets (hosts) specifiable in case of failure of all primary targets.
• Server Health check Engine via: PING, TCP Socket Open and freely Customizable UDP Health Check Agent.
• Real-time alerting via Email and SNMP traps.
• Increase reliability by operating in active-passive clusters
• Support for multiple instances of Load Balancer
• Session and packets/bytes based reporting for each instance
• Easy to use Web-based UI for configuration and reporting
• Easy to use Configuration Wizard for configuration of instances, targets and networks
• Out of the box experience - product can be up and running in 20 minutes
• Distribution methods: Round Robin, Simple Weighted Round Robin, Random, Client Address Hashing and "Least Resource" based on agent supplied information
• Direct Server Return (DSR) operation support
• Unchanged client addresses on IP-level
• Multi-node High Availability capability using standard VRRP (Virtual Router Redundancy Protocol)
• "All service load balancing" based on client IP address enables most protocols to be supported (e.g. active FTP, RTSP/RTP/RTCP, DNS etc.)
• Session table with up to 16 million concurrent sessions
• Full support of session table state replication / session synchronization between VRRP master and backup
• Six 10/100/1000 autosensing full duplex Ethernet ports - front facing for convenient access

CLB is based on the Celestix’s fourth generation Scorpio X appliance platform. The Scorpio X has been finely tuned to provide a compelling price/performance ratio as a hardware platform.
Slingshot Appliance Engine includes:

• Setup, routing, NIC configuration, local users, software updates,
• Reboot/restart, log file viewing, ongoing monitoring, etc.
• Advanced software updates engine
• Disaster recovery - One-button system rollback to a factory default state
• Purpose-built appliance hardware platform
• LCD/jog dial for instant deployment and status info
• Optimized Celestix motherboard results in high reliability
• Half-depth 1U form factor for “rail-less” mounting

Screen Shots