What ports are defined in the NCache service configuration?

NCache defines several ports in the service configuration: Client/Server TCP Port (NCacheServer.Port): the port at which the cache server listens for client connections (default 9800). Management Port (NCacheServer.ManagementPort): the port used for cache management operations (default 8250). Cache Host Management Range (NCacheServer.ManagementPortLower / NCacheServer.ManagementPortUpper): a configurable range assigned to caches in separate host processes. SNMP Listeners Info Port (NCacheServer.SnmpListenersInfoPort): the port on which the SNMP info agent listens (default 8256) for SNMP-based monitoring.

Where do I change the default NCache server ports?

Default cache server ports are changed in the NCache Service configuration file by updating the appropriate entries. After editing the configuration, restart the NCache service on each node for changes to take effect.

What is the Cache Host Management Port Range?

When a cache runs in its own host process, NCache assigns dynamic management ports from a configurable range defined by ManagementPortLower and ManagementPortUpper. This allows multiple caches on the same node to be managed independently.

What does the SNMP Listeners Info Port do?

The SNMP Listeners Info Port specifies the TCP port on which the SNMP Listener Info sub-agent runs. This port enables SNMP-based monitoring of cache counters via external monitoring systems.

Cache Server Ports

This page discusses how to configure the different cache server ports available in NCache for client/server communication, cache management, cluster coordination, and SNMP-based monitoring. It explains the default TCP ports used by NCache, when and why these ports must be opened in firewalls, and how to update port settings in the NCache Service configuration file to avoid conflicts and ensure reliable cluster and management operations.

Client/Server TCP Port

The Client/Server TCP Port in the service config file specifies the port at which the cache server will listen for the incoming connection requests.

<add key="NCacheServer.Port" value="9800" />

Management Ports

Management Port in the service config file specifies the port at which the cache management server will listen for the incoming connection requests.

<add key="NCacheServer.ManagementPort" value="8250" />

When a cache is started in its own separate process, it is assigned a Management Port (two ports in case of the Partition-Replica topology). These ports are assigned from a range of ports which can be configured by setting the keys listed below. ManagementPortLower is the starting port from which the first free port available will be consumed. The ManagementPortUpper is the upper limit.

<add key="NCacheServer.ManagementPortLower" value="8300" />

<add key="NCacheServer.ManagementPortUpper" value="8400" />

SNMP Listeners Info Port

This tag is used to specify the port on which the SNMP listeners info sub-agent runs. It enables SNMP-based monitoring of cache counters.

<add key="NCacheServer.SnmpListenersInfoPort" value="8256"/>

By default, the value of this is set to 8256, but can be configured as per your requirements.

Cache Server Ports

Client/Server TCP Port

Management Ports

SNMP Listeners Info Port

See Also

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