Web OS 10.0 Application Guide128 n Chapter 6: Server Load Balancing 212777-A, February 2002Additional Server Load Balancing OptionsIn the previous section (“Configuring Server Load Balancing” on page 124), many of the SLBoptions are left to their default values. The following configuration options can be used to cus-tomize SLB on your Web switch: “Supported Services and Applications” on page 128 “Disabling and Enabling Real Servers” on page 129 “IP Address Ranges Using imask” on page 129 “Health Checks for Real Servers” on page 130 “Configuring Multiple Services” on page 130 “Metrics for Real Server Groups” on page 131 “Weights for Real Servers” on page 134 “Connection Time-outs for Real Servers” on page 134 “Maximum Connections for Real Servers” on page 134 “Backup/Overflow Servers” on page 135Supported Services and ApplicationsEach virtual server can be configured to support up to eight services, limited to a total of 256services per switch. Using the /cfg/slb/virt /serviceoption, the following TCP/UDP applications can be specified:N OTE – The service number specified on the switch must match the service specified on the server.N OTE – Load balancing some applications (such as FTP and RTSP) require special attention.See “Load Balancing Special Services” on page 149 for more information.Table 6-3 Well-Known Application PortsNumber TCP/UDPApplicationNumber TCP/UDPApplicationNumber TCP/UDPApplication2021222325374243536970ftp-dataftpsshtelnetsmtptimenamewhoisdomaintftpgopher7980109110111119123143144161162fingerhttppop2pop3sunrpcnntpntpimapnewssnmpsnmptrap1791942203894435205541645, 181218131985bgpircimap3ldaphttpsriprtspRadiusRadius Accountinghsrp
