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How can I determine which ports the Multi-Tier Request Broker uses?

The Request Broker port appears in the Session Rules Book. This is the oplrqb.ini file that appears in the /bin sub-directory of the user's server components installation. Users need to open this file with a text editor and locate the following section:

[Protocol TCP]
PingWatchdog = No
PingInterval = 600
Listen         = 5000
PortLow      = 5000
PortHigh     = 5099
IPAddress      =

OpenLink's 4.x and 5.x Brokers listen on the port passed by the Listen parameter. OpenLink's 1.x and 3.x Brokers listen on the initial port as specified by the PortLow parameter.