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Manual Chapter: Monitoring Third-Party Servers with SNMP
Manual Chapter
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11 
SNMP, or Simple Network Management Protocol, is frequently used to acquire data from different network systems. At the core of SNMP is a MIB, or Management Information Base, which specifies the data available on a given system.
In a BIG-IP® system environment, you typically use SNMP for acquiring information about the health of a third-party server. To accomplish this, you assign an SNMP monitor to a server currently running SNMP. This monitor can then provide information on the availability of that server.
To see how you can use SNMP to monitor a third-party server, consider the fictional company, SiteRequest. SiteRequest has a server that contains several resources related to one of its web applications. This server is not a BIG-IP system; however, it does have SNMP running. As a result, the IT department has opted to use the SNMP monitor included with the Global Traffic Manager to track the availability of the server.
For the purposes of this example, you use the server name SiteRequest Resource, which has an IP address of 10.0.1.25. You also use the data center name, SiteRequest-main. In this example, you have already created the data center.
The first task in monitoring a server running SNMP requires you to add the server to the Global Traffic Manager configuration.
In this example you add the server, SiteRequest Resource, to the network. This server has the IP address 10.0.1.25.
1.
On the Main tab of the navigation pane, expand Global Traffic and then click Servers.
2.
Click Create.
3.
In the Name box, type the name of the sever.
For this example, type SiteRequest Resource.
4.
From the Product list, select the server type.
For this example, select Generic Host.
5.
For the Address List setting, complete the following tasks:
In the Address box, type the IP address of the server.
For this example, type 10.0.1.25.
Click Add.
6.
From the Data Center list, select the data center to which the server belongs.
For this example, select SiteRequest-main.
7.
Locate the Resources area, which is close to the bottom of the screen, and from the Virtual Server List option, select Disabled.
8.
Click Create.
One of the requirements of the SNMP monitor on the Global Traffic Manager is that you must assign a virtual server to the server being monitored. Without this virtual server, the SNMP monitor cannot acquire information about the system.
For this example, you add a virtual server, vs-generic-1, with an IP address of 10.100.100.5, to the server you created in the previous section.
1.
On the Main tab of the navigation pane, expand Global Traffic and click Servers.
2.
Click the name of the server to which you want to add virtual servers.
For this example, click the link for SiteRequest Resource.
3.
On the menu bar, click Virtual Servers.
4.
Click Add.
5.
In the Name box, type the name of the virtual server.
For this example, type the name vs-generic-1.
6.
In the Address box, type the IP address of the virtual server.
For this example, type the IP address 10.100.100.5.
7.
Click Create.
Now that the server is in the Global Traffic Manager configuration, you can create an SNMP monitor. For the purposes of this example, the default values assigned to an SNMP monitor are sufficient for SiteRequests server.
In this example, you create an SNMP monitor called Site-Request SNMP. This monitor uses the default SNMP monitor settings.
1.
On the Main tab of the navigation pane, expand Global Traffic and then click Monitors.
2.
Click Create.
3.
In the Name box, type the name of the monitor.
For this example, type SiteRequest-SNMP.
4.
From the Type list, select a monitor type.
For this example, select SNMP.
5.
Click Finished.
1.
On the Main tab of the navigation pane, expand Global Traffic and then click Servers.
2.
Click the server name, SiteRequest Host.
3.
For the Health Monitors setting, select SiteRequest-SNMP from the Available list and then use the Move [<<] button to move the monitor to the Selected list.
Note: This ensures that the monitor starts to check the availability of the server.
4.
Click Update.
You now have an SNMP monitor assigned to a third-party server within the Global Traffic Manager configuration. The system can now use this monitor to verify that the server is available for load balancing DNS requests.
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