Alteon Application Switch Operating System Application Guide
Filtering and Traffic Manipulation
364 Document ID: RDWR-ALOS-V2900_AG1302
Load Balancing Modes
Alteon supports a wide range of deployment scenarios, and can perform traffic and flow
manipulation, and redirection based on the service requirement. The supported load balancing
modes range from being completely transparent to the user to services that are completely visible.
This supported modes include
• Transparent Load Balancing, page 364
• Semi-Transparent Load Balancing, page 367
• Non-Transparent Load Balancing, page 371
Transparent Load Balancing
Transparent load balancing is the deployment of a server load balancer where the network and/or
client traffic is not interrupted. That is, Alteon redirects the traffic and returns it to the client without
changing any of its parameters. Transparent load balancing can be performed in various ways.
The following are examples of supported transparent load balancing scenarios:
• Redirecting Traffic with a Transparent Server, page 364
• Redirecting Traffic with a NAT Filter, page 366
Redirecting Traffic with a Transparent Server
When redirecting traffic with a transparent server, the client traffic is redirected to a VAS server
group. By using reverse session, an opposite entry is added to the session table so that the return
traffic matches its source MAC address and is redirected to the VAS server group before returning to
the client. None of the client traffic parameters are changed in the process.
Figure 53: Redirecting Traffic with a Transparent Server
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