Manual Niagara 9100 Series V7.0 (page 194 of 250) (English)

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SNMP

186 ViewCast

External SNMP Manager

With ViewCast SNMP agent enabled in each Niagara system, you can start a single SNMP manager at a

central location to manage one or multiple systems at the same time.

The external SNMP manager could be a GUI-based commercial or free application tool or an SNMP

scripting tool. The SNMP manager is your choice.

SNMP UDP Ports Used by SNMP Manager and

SNMP Agents

UDP Port for SNMP Requests

When the external SNMP manager expects to “talk” to the ViewCast SNMP agent, it sends SNMP

requests to the ViewCast SNMP agent over the default SNMP UDP port 161 with the following

parameters:

 Correct IP address of the encoder system

 Other parameters such as an appropriate community name

 Configure the corresponding community name

Note: For SNMP v1/v2c version, a community name is treated as a password to access the resources

managed by the SNMP agent. Different community names can have different access rights such

as NOTIFY ONLY, READ ONLY, WRITE ONLY, READ WRITE and READ CREATE etc.

You can configure the ViewCast SNMP agent to receive SNMP requests over a different UDP port other

than 161 (see Use UDP Port Other Than 161 for SNMP Requests).

Note: Once you configure the SNMP UDP port, you don’t have to manually enable in the firewall

setting. Instead, it is enabled automatically when the ViewCast SNMP agent is started.

Because the ViewCast SNMP agent acts as the master agent and “talks” to the external SNMP

manager, it is not necessary to enable the firewall setting on the same UDP port for the native

SNMP service.

UDP Port for SNMP Traps

SNMP traps are sent from the SNMP agent to the SNMP trap listener. You can monitor and receive

SNMP traps over UDP port 162 from one or multiple SNMP-enabled Niagara systems. Perform the

following to monitor and receive SNMP traps:

 Configure the IP address where the SNMP trap listener runs as one of the trap destinations for

each affected ViewCast SNMP agent.

 Configure the corresponding community name.

 Keep running an SNMP trap listener application to monitor traps over SNMP UDP port 162 with an

appropriate community name.

 Allow the trap listener to pass through the firewall on UDP port 162.

Note: Choosing a trap listener is up to you. The trap listener doesn’t have to run on the system.

Instead, it runs in a centralized location.

If you use the Windows SNMP Trap Service as the trap listener, you need to make sure Windows SNMP

Trap Service is installed, started, and allowed to pass through the firewall on UDP port 162.

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Niagara 9100 Series V7.0 Manual

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