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Foglight Experience Monitor 5.8.1 - Installation and Administration Guide

Installing and configuring Multi-appliance clusters Configuring the appliance Specifying monitored web traffic Transforming monitored URLs Managing applications Foglight components and the appliance Using the console program Troubleshooting the appliance Appendix: Third party software Appendix: Dell PowerEdge system appliance

Detecting ports in use

To detect all of the ports that are currently being used, use the auto-discovery feature on this page. A list of ports in use is returned. The data that is returned for each port can help you determine if there are any deployment issues with how the appliance is monitoring network traffic.

To detect ports in use:
1
Click Auto-Discover Ports.
The appliance begins to analyze current network traffic and lists the ports that it discovers. The auto-discovery page refreshes frequently, and all ports appear within a few seconds.
2
To stop the auto-discovery process, click Stop at any point.
The auto-discovery page displays the following data:
 
Table 3. Information displayed on the auto-discovery page
Data
Definition
Ports

Displays the port number.

Client Packets

The number of client packets being transmitted from clients to the server.

NOTE: If the packet count is zero and the Server Packet value is greater than zero, the network tap is not configured correctly.
Server Packets

The number of packets being transmitted from servers to clients.

NOTE: If the packet count is zero and the Client Packet value is greater than zero, the network tap is not configured correctly.
New TCP Connections

The number of TCP connections that have been observed on the port.

NOTE: If the number of connections equals zero or the number is small in relation to the number of active connections, the load balancer is maintaining a limited number of TCP connections to the web server and using the proxy server to send all requests over the TCP connections.
Active TCP Connections

The number of active TCP connections discovered in the traffic for the port.

3
Click the details link to open a details dialog box for this port.
The HTTP-detected and SSL-detected indicators report whether HTTP or SSL traffic was detected for this port. All servers listening on this port are listed.
4
Click OK to close the window.
5
Select the check boxes that correspond with any ports you want the appliance to use to monitor traffic.
6
Click Add.
The Protocols > Edit page appears where you can assign a name and type to the protocol definition, and then save it.
7
Click Next to proceed to the next step of the Setup Wizard.

Configuring servers

Configuring servers

The Servers page allows you to identify which servers on your network are being monitored by the appliance.

Figure 11. Servers page

Auto-discover servers

Although you can manually enter the IP addresses of the servers you want to monitor, it is recommended that you use the auto-discovery feature to detect available server IP addresses in the traffic that the appliance is currently receiving.

To automatically discover servers:
1
Click Auto-Discover Servers to begin the server detection process.
The appliance begins to analyze current network traffic and looks for server IPs. The page updates every few seconds, expanding the list of servers as they are detected. The list of servers should be complete within one minute.
 
* 
TIP: If only one IP address is displayed during the auto-discovery process, you may have a situation where the physical server IPs are not present in the IP headers of the traffic the appliance is receiving. This is typically the case when a load balancer is in use. For this case, you need to perform additional configuration steps in the appliance. For more information, see Configuring a server identification tag.
2
Click Stop at any point to stop the process.
All servers found appear in a check-list.
The following information displays in the returned list of Servers.
 
Table 4. Information displayed in the list of servers page
Data
Definition
Servers

Displays the server number.

Client Packets

The number of client packets being transmitted from clients to the server.

NOTE: If the packet count is zero and the Server Packet value is greater than zero the network tap is not configured correctly.
Server Packets

The number of packets being transmitted from the server to clients.

NOTE: If the packet count is zero and the Client Packet value is greater than zero the network tap is not configured correctly.
New TCP Connections

The number of TCP connections that have been observed on the port.

NOTE: If the number of connections equals zero or the number is small in relation to the number of active connections, the load balancer is maintaining a limited number of TCP connections to the web server and using the proxy server to send all requests over the TCP connections.
Active TCP Connections

The number of active TCP connections discovered in the traffic for the port.

3
Click the details link to open a details dialog box for this server.
The HTTP-detected and SSL-detected indicators report whether HTTP or SSL traffic was detected for this port. Active ports for the server are listed.
4
Click OK to close the window.
5
Select all the server check boxes that you want the appliance to monitor.
6
Click Add.
7
You are returned to the main Servers page, and all newly added servers are now listed.
 
* 
IMPORTANT: You can configure a maximum of 300 server IPs. Once the appliance is running, use the System Health metrics to determine whether the number of servers you have configured is too much for a single appliance. If the Packet Drop Rate is above 1% then you may need to reduce the number of server you have configured and investigate alternative deployment configurations.

For more information about servers, see Managing monitored servers.

Completing the Setup Wizard

The final page of the Setup Wizard summarizes the configuration choices made in previous steps, and asks that you confirm them.

Figure 12. Setup Wizard final page

Review all the configuration settings. It you need to return to any point in the Setup Wizard to make modifications, click the Jump to Page links to move to specific pages, or use the Setup Wizard Back button to review pages in reverse chronological order.

When you are satisfied with the configuration settings, click Finished to complete the Setup Wizard.

 
* 
NOTE: If you do not click Finished, the appliance does not begin collecting data, and the next time you log in to the web console, you are prompted to begin the Setup Wizard again. However, all information entered in the previous session with the Setup Wizard is retained, and you can simply click Next at each step if you are still content with the configuration settings that exist.

After clicking Finished, you are taken to the home page. The appliance begins to monitor traffic and metrics begin to appear within 10 minutes.

 
* 
TIP: After the appliance is deployed, if you encounter data collection or communication problems, see Troubleshooting the appliance for help. The steps outlined in the Troubleshooting chapter help you to pinpoint the source of these problems.

Maintaining the appliance

As a best practice, it is recommended that you reboot each appliance at least once every 90 days. This operation can be performed through the console program (for details, see System restart).

Rebooting the appliance allows the system to run the standard file system maintenance utilities (fsck and xfsrepair) during the boot-up sequence. This helps to avoid file system inconsistency errors that periodically arise in the normal course of operations. Failing to run these system maintenance utilities on a regular basis may result in the need for manual disk repairs that could involve booting the system from a CD.

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