The Network Layer

The Network layer enables administrators to instantaneously detect network connection failures that could render the Solaris kernel inaccessible to users, and any unexpected / unusual increase in traffic to or from the kernel.

layer3tests(new)-final

Figure 3 : The tests mapped to the Network layer

These tests have been elaborately discussed in the Monitoring Unix and Windows Servers document. In addition, the following tests also run on the layer, but are disabled by default.

 

Ethernet Link Aggregation Test

Link aggregation enables one or more network links to be aggregated together to form a link aggregation group. When network links are aggregated, more bandwidth resources become available to the network and load on the network can be uniformly distributed across the links. If one/more links in a group go down, it may limit the bandwidth resources available to the group and may even overload a few other links in the group. To avoid this, administrators must continuously track the state of every link within every aggregation group that is configured. This is where the Ethernet Link Aggregation test helps! This test periodically checks the status of each link aggregated within every link aggregation group and instantly alerts administrators when a link goes down or is in an unknown state. This way, the test enables administrators to ensure that all links in an aggregate group are available at all times for providing bandwidth resources and handling the network load.

Target of the test : A Solaris virtual server

Agent deploying the test : An internal agent

Outputs of the test : One set of results for each link in each link aggregation group

Configurable parameters for the test
Parameter Description

Test period

How often should the test be executed

Host

The host for which the test is to be configured.

Port

The port number at which the specified host listens. By default, the port is NULL.

Connect Using

By default, this parameter is set to sudo. This indicates that, by default, this test uses the sudo command to connect to the Solaris virtual server and pull out metrics. If you want the test to use the pfexec command instead, select the pfexec option from the Connect Using drop-down.

Detailed Diagnosis

To make diagnosis more efficient and accurate, the eG Enterprise suite embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option.

The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled:

  • The eG manager license should allow the detailed diagnosis capability
  • Both the normal and abnormal frequencies configured for the detailed diagnosis measures should not be 0.

 

Measurements made by the test
Measurement Description Measurement Unit Interpretation

Link aggregation status

Indicates the current status of this link within this link aggregation group.

 

The values that this measure can report and their corresponding numeric values are listed in the table below:

Measure Value Numeric Value
Up 0
Down 1
Unknown 2

Note:

By default, this measure reports the Measure Values in the table above to indicate link status. In the graph of this measure however, the same is represented using the corresponding numeric equivalents only.

The detailed diagnosis of this test reveals the speed, operational state, and duplex state of a link.

 

Ethernet Links Test

If a user complaints that he/she is unable to connect to the server over the network, administrators will want to know whether any Ethernet link to the server is down presently. This can be determined using the Ethernet Links test. This test reports the state of every Ethernet link and notifies administrators if a link goes down.

Target of the test : A Solaris virtual server

Agent deploying the test : An internal agent

Outputs of the test : One set of results for each Ethernet link.

Configurable parameters for the test
Parameter Description

Test period

How often should the test be executed

Host

The host for which the test is to be configured.

Port

The port number at which the specified host listens. By default, the port is NULL.

Connect Using

By default, this parameter is set to sudo. This indicates that, by default, this test uses the sudo command to connect to the Solaris virtual server and pull out metrics. If you want the test to use the pfexec command instead, select the pfexec option from the Connect Using drop-down.

Detailed Diagnosis

To make diagnosis more efficient and accurate, the eG Enterprise suite embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option.

The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled:

  • The eG manager license should allow the detailed diagnosis capability
  • Both the normal and abnormal frequencies configured for the detailed diagnosis measures should not be 0.
Measurements made by the test
Measurement Description Measurement Unit Interpretation

Link status

Indicates the current status of this link.

 

The values that this measure can report and their corresponding numeric values are listed in the table below:

Measure Value Numeric Value
Up 0
Down 1
Unknown 2

Note:

By default, this measure reports the Measure Values in the table above to indicate link status. In the graph of this measure however, the same is represented using the corresponding numeric equivalents only.

The detailed diagnosis of this test reveals the speed and duplex state of a link.