Additional Server Load Balancing Options; Table 6-3 Well-Known Application Ports - Nortel Web OS Switch Software Application Manual

Web OS 10.0 Application Guide

Additional Server Load Balancing Options

In the previous section
options are left to their default values. The following configuration options can be used to cus-
tomize SLB on your Web switch:
n
"Supported Services and Applications" on page 128
n
"Disabling and Enabling Real Servers" on page 129
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"IP Address Ranges Using imask" on page 129
n
"Health Checks for Real Servers" on page 130
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"Configuring Multiple Services" on page 130
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"Metrics for Real Server Groups" on page 131
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"Weights for Real Servers" on page 134
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"Connection Time-outs for Real Servers" on page 134
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"Maximum Connections for Real Servers" on page 134
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"Backup/Overflow Servers" on page 135
Supported Services and Applications
Each virtual server can be configured to support up to eight services, limited to a total of 256
services per switch. Using the /cfg/slb/virt <virtual server number>/service
option, the following TCP/UDP applications can be specified:
N
OTE

Table 6-3 Well-Known Application Ports

Number
20
21
22
23
25
37
42
43
53
69
70
N
OTE
See "Load Balancing Special Services" on page 149
n
128 Chapter 6: Server Load Balancing
("Configuring Server Load Balancing" on page
–
The service number specified on the switch must match the service specified on the server.
TCP/UDP
Application
ftp-data
ftp
ssh
telnet
smtp
time
name
whois
domain
tftp
gopher
–
Load balancing some applications (such as FTP and RTSP) require special attention.
Number TCP/UDP
Application
79 finger
80 http
109 pop2
110 pop3
111 sunrpc
119 nntp
123 ntp
143 imap
144 news
161 snmp
162 snmptrap
for more information.
124), many of the SLB
Number TCP/UDP
Application
179 bgp
194 irc
220 imap3
389 ldap
443 https
520 rip
554 rtsp
1645, 1812 Radius
1813 Radius Accounting
1985 hsrp
212777-A, February 2002