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Foglight for SNMP 5.9.2 - User and Reference Guide

Configuring SNMP agent properties

The SNMP agent includes the following groups of agent properties:

•
SNMP properties
•
Devices and collection OIDs
•
Credentials
SNMP properties
To configure the SNMP agent properties:
1
On the navigation panel, under Dashboards, click Administration > Agents > Agent Status.
2
Select the SNMP agent. For example, GenericSNMPLinuxAgent.
3
On the toolbar, click Edit > Edit Properties.
4
Click Modify the private properties for this agent.
5
In the SNMP Properties section, make your changes and click Save.
Figure 3. SNMP properties.
•
SNMP Timeout: Timeout in milliseconds before a confirmed request from a device is received.
•
Poller Retries: Retry times for retrieving the data if timeout.
•
SNMP Socket Timeout: UDP socket timeout for incoming messages in milliseconds. A timeout of zero is interpreted as an infinite timeout.
•
SNMP Worker Threads: The number of threads used to perform different SNMP collections concurrently.
•
Startup Timeout: Total time limit trying to start monitoring the device. During this time, the device would be started several times.
•
Startup Polling Interval: The interval between each attempt to start the device.
•
ICMP Worker Threads: The number of threads which were used for ICMP Ping when doing the discovery.
•
ICMP Timeout: The time, in milliseconds, before the call cancels.
•
ICMP Delay Interval: The delay interval between each ICMP retry.
•
ICMP Retry Timeout: Timeout for ICMP retry.
•
ICMP Retry Interval: Retry interval for ICMP.
•
ICMP Retry Times: Retry times for Internet Control Message Protocol.
•
Minimum delay between issuing SNMP requests to multiple hosts: Guarantees at least a delay of the set value between subsequent requests to the same host.
•
Minimum delay between issuing SNMP requests to the same host: Ensures at least a delay of the set value between consecutive requests to any host.
Devices and collection OIDs
To configure the device and collection IODs:
1
On the navigation panel, under Dashboards, click Administration > Agents > Agent Status.
2
Select the SNMP agent. For example, GenericSNMPLinuxAgent.
3
On the toolbar, click Edit > Edit Properties.
4
Click Modify the private properties for this agent.
5
Make any required changes and click Save.
Figure 4. Devices and collection OID properties

Devices

Each entry in the list includes the following columns:

* 
IMPORTANT: Device properties must be added or edited using the SNMP Discovery. All properties listed below should be considered read-only, except where noted. For more information, see Running SNMP discovery .
•
IP Address: The IP address of the target device.
•
Override Name: The user-supplied name used as the identity of the host.
•
SNMP Port: Port for SNMP discovery and monitoring. (Editable)
•
Credential: The ID of a credential’s secondary property. (Editable).
* 
NOTE: To obtain the id of an SNMP version, click the Edit button to the right of the credentials property.
•
Vendor: The vendor name of the target device.
•
Is Monitoring: A flag indicating whether the target device is monitoring or not. (Editable).
•
Is Monitored By IC: A flag indicating whether the target is monitored by an Infrastructure agent.
Custom Properties Configuration

Each entry in the list includes the following columns:

•
OID: User customized OID.
•
Alias: The alias of the OID.
•
OID Type: The OID type. Supports string, metric, and tables.
•
Parent ID: The OID of the parent table. Required to maintain the relationship between columns and the table.
•
Editable: A flag indicating whether this OID is editable or not. A user added OID is editable.
•
Enable: A flag indicating whether this monitor is collecting for this OID or not.
Monitor Configurations

Each entry in the list includes the following columns:

•
Monitor ID: The identity of the monitor. Do not edit or change this ID.
•
Interval: Interval for collecting this monitor.
•
Time Unit: The interval time unit.
•
Enable: A flag indicating if this monitor is collecting for this OID or not.
•
Show: False means that this monitor is removed from this agent and may not be edited anymore.
Credentials

You can change the credentials for an SNMP agent, for example, if a credential becomes compromised.

There are two options for changing this global credential.

•
Use the Administration > Agents > Agent Properties dashboard. Select the SNMP agent from the Namespace > Type list.
Or
•
Use the Administration > Agents > Agent Status dashboard. Select the SNMP agent. For example, GenericSNMPLinuxAgent. On the toolbar, click Edit > Edit Properties and click Modify the properties for all GenericSNMPAgent agents.
Figure 5. Credentials properties.

Each entry in the list includes the following columns:

•
ID: The identity of the credential.
•
Version: SNMP version. Supports V1, V2c, and V3.
•
Community: SNMP community string. The default is public.
•
User ID: System generated ID.
•
User Name: V3 credential user name.
•
Auth Type: Authentication type. Supports MD5 and SHA.
•
Auth Password: Authentication password.
•
Privacy Type: Privacy type. Supports DES, DESv3, AES, AES128, AES192, and AES256.
•
Privacy Password: Privacy password.

Changing the GenericSNMPTrapAgent port

A GenericSNMPTrapAgent is created for each Agent Manager that you are using to monitor SNMP devices.

The default port number for a GenericSNMPTrapAgent is 162, but it can be changed.

On Linux, non-root users cannot bind to ports below 1024 on Linux hosts (by default), so this port number must be changed.

The GenericSNMPTrapAgent has two properties:

•
snmpTrapPort - Used to configure the port for the agent to receive SNMP traps from monitored SNMP devices. The port is opened on the agent side and is used to listen to the SNMP traps sent from the monitored devices.
•
devices - Do Not Change. The items in this table are populated by the GenericSNMPTrapAgent cartridge which is used to help the SNMPTrap agent decide if the agent should report the trap sent from an SNMP device. Only when the SNMP device sending the trap is in this monitored devices list, the agent will then report it and show it in the corresponding SNMP device dashboard.

The only property that should be changed for the GenericSNMPTrapAgent is the snmpTrapPort.

To change the port number:
1
Log in to the Foglight browser interface. On the navigation panel, under Dashboards, click Administration > Agents > Agent Status.
2
Select the GenericSNMPTrapAgent.
3
On the toolbar, click Edit > Edit Properties.
4
Click Modify properties for this agent only.
5
In the SNMP configurations and devices info section, change the snmpTrapPort number.
* 
IMPORTANT: The devices property is configured automatically by the agent. It identifies the device that is sending the trap. It should not be changed.
6
Click Save.
Related topics:
•
Configuring SNMP agent properties
•
Running SNMP discovery

Viewing SNMP monitored hosts

SNMP monitored hosts can be viewed from the Infrastructure Environment dashboard.

When you select a monitored host and display its resource utilization views in the Quick View, you can drill down to a detailed view to explore that host’s activity. For example, selecting a Windows® host and choosing Explore displays a monitoring dashboard that helps you understand the state of the host’s resources and how they affect your monitored system as a whole.

To select an SNMP monitored host:
1
On the navigation panel, under Dashboards, click Infrastructure.
The Infrastructure Environment dashboard opens.
2
Select a monitored host from the list of hosts in the view on the left.
3
In the top-right corner of the Resource Utilizations on hostname view, click Explore.
 
* 
NOTE: If the host is also monitored by an Infrastructure agent, the Monitor tab appears in addition to SNMP-related tabs.

In addition to the information displayed in the right-hand panel, the Physical and Unknown Host Selector is displayed on the navigation panel. Selecting a different monitored host refreshes the information displayed.

Figure 6. Physical and Unknown Host Selector in the navigation panel.

When you drill down into various levels across dashboards, a trail of breadcrumbs is left at the top of the current dashboard. This trail provides you with a simple path for returning to the main Infrastructure Environment view.

Click Infrastructure Environment in the breadcrumb to return to the main view.

Related topics:
•
Hosts monitored by both an Infrastructure and SNMP agent
•
Hosts monitored only by SNMP
•
Configuring SNMP agent properties
•
Foglight for SNMP reference

Hosts monitored by both an Infrastructure and SNMP agent

When a host is monitored by both an Infrastructure and an SNMP agent, you see an Infrastructure-related Monitor tab and various SNMP tabs. SNMP tabs include Overview, Networking, and Disk Volumes.

 
* 
NOTE: The number of SNMP tabs is dynamic depending on which monitors have been enabled for the operating system selected. For example, if you disable the diskVolumes monitor for Windows®, then the Disk Volumes tab is hidden.
Figure 7. Example of a host monitored by both an Infrastructure and an SNMP agent.

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