NetScaler UDP Test

This test monitors the UDP packets/data flowing into and out of the NetScaler appliance, and thus reveals the current UDP load on the appliance. In the process, the test promptly detects UDP packet limit violations and alerts administrators to it, so that potential overload conditions or probable network congestions due to high UDP traffic can be detected and averted.

Target of the test : A NetScaler VPX/MPX

Agent deploying the test : A remote agent

Outputs of the test : One set of results for the NetScaler appliance being monitored.

Configurable parameters for the test
Parameter Description

Test Period

How often should the test be executed.

Host

The IP address of the host for which the test is being configured.

NetScaler Username and NetScaler Password

To monitor a NetScaler device, the eG agent should be configured with the credentials of a user with read-only privileges to the target NetScaler device. Specify the credentials of such a user in the NetScaler Username and NetScaler Password text boxes.

Confirm Password

Confirm the NetScaler Password by retyping it here.

SSL

The eG agent collects performance metrics by invoking NITRO (NetScaler Interface Through Restful interfaces and Objects) APIs on the target NetScaler device. Typically, the NITRO APIs can be invoked through the HTTP or the HTTPS mode. By default, the eG agent invokes the NITRO APIs using the HTTPS mode. This is why, the SSL flag is set to Yes by default. If the target NetScaler device is not SSL-enabled, then the NITRO APIs can be accessed through the HTTP mode only. In this case, set the SSL flag to No.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

Current rate threshold

Indicates the limit of UDP packets handled every 10 milliseconds.

Number

This implies that within 10 milliseconds (ms) range, NetScaler can allow (receive or pass through) the set number of UDP packets. This threshold is configurable. Once this threshold is violated, subsequent UDP packets will be dropped by the appliance. You are hence advised to configure this limit based on the current and anticipated UDP traffic to the NetScaler appliance. To set/alter this limit, use the set rateControl command.

Data received

Indicates the amount of UDP data received during the last measurement period.

MB

These measures are good indicators of the UDP load on the NetScaler appliance.

Data transmitted

Indicates the amount of UDP data transmitted during the last measurement period.

MB

Packets received

Indicates the number of UDP packets received during the last measurement period.

 

 

Number

Packets transmitted

Indicates the number of UDP packets sent during the last measurement period.

 

Number

Unknown service

Indicates the number of UDP packets that were received on a NetScaler port number that is not assigned to any service.

Number

This measure counts those UDP packets that were received, but dropped.

Bad UDP checksum

Indicates the number of packets that were received with a checksum error.

Number

 

Rate threshold exceeded

Indicates the number of times the value reported by the Current rate threshold measure has been violated.

Number

A high value of this measure indicates that the Current rate threshold has been violated often. When this happens, you must first ensure that the UDP packets received are genuine. If they are genuine, then you must increase the current rate threshold. To set/alter this limit, use the set rateControl command.