Alteon Application Switch Operating System Application Guide
Server Load Balancing
Document ID: RDWR-ALOS-V2900_AG1302 195
Mapping a Virtual Server Port to a Real Server Port
In addition to providing direct real server access in certain situations (see Mapping Ports for Multiple
IP Addresses, page 202), mapping is required when administrators choose to execute their real
server processes on different ports than the well-known TCP/UDP ports. Otherwise, virtual server
ports are mapped directly to real server ports by default and require no mapping configuration.
Port mapping is configured from the Virtual Server Services menu. For example, to map the virtual
server TCP/UDP port 80 to real server TCP/UDP port 8004:
Mapping a Virtual Server Port to Multiple Real Server Ports
To take advantage of multi-CPU or multi-process servers, Alteon can be configured to map a single
virtual port to multiple real ports. This lets site managers, for example, differentiate users of a
service by using multiple service ports to process client requests.
Alteon supports up to 64 real ports per server when multiple rports are enabled. This feature allows
the network administrator to configure up to 64 real ports for a single service port. It is supported in
Layer 4 and Layer 7 and in cookie-based and SSL persistence switching environments.
When multiple real ports on each real server are mapped to a virtual port, Alteon treats the real
server IP address/port mapping combination as a distinct real server.
Note: For each real server, you can only configure one service with multiple real ports.
Figure 31 - Basic Virtual Port-to-Real Port Mapping Configuration, page 195
illustrates an example
virtual port-to-real port mapping configuration:
Figure 31: Basic Virtual Port-to-Real Port Mapping Configuration
>> # /cfg/slb/virt 1/service 80
(Select virtual server port 80)
>> Virtual Server 1 http Service# rport 8004
(Map to real port 8004)
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