Radware WSD Application Server Test

An Application server is modelled as a Load Balancer member. If the application servers are assigned to different farms having the same name IP address and Port, they are treated as a load balancer member.

This test monitors the inconsistencies in bandwidth, monitors the health of each application server and reveals how well each application server processes client requests. In addition, this test detects inconsistencies in load-balancing early on and warns administrators of possible deviations proactively.

Target of the test : A Radware AppDirector

Agent deploying the test : An External agent

Outputs of the test : One set of results for each Application server configured on the target Radware Appdirector that is to be monitored.

Configurable parameters for the test
Parameters Description

Test period

How often should the test be executed

Host

The IP address of the target switch that is being monitored.

SNMPPort

The port at which the monitored target exposes its SNMP MIB; the default is 161.

SNMPVersion

By default, the eG agent supports SNMP version 1. Accordingly, the default selection in the SNMPversion list is v1. However, if a different SNMP framework is in use in your environment, say SNMP v2 or v3, then select the corresponding option from this list.

SNMPCommunity

The SNMP community name that the test uses to communicate with the firewall. This parameter is specific to SNMP v1 and v2 only. Therefore, if the SNMPVersion chosen is v3, then this parameter will not appear.

Username

This parameter appears only when v3 is selected as the SNMPversion. SNMP version 3 (SNMPv3) is an extensible SNMP Framework which supplements the SNMPv2 Framework, by additionally supporting message security, access control, and remote SNMP configuration capabilities. To extract performance statistics from the MIB using the highly secure SNMP v3 protocol, the eG agent has to be configured with the required access privileges – in other words, the eG agent should connect to the MIB using the credentials of a user with access permissions to be MIB. Therefore, specify the name of such a user against this parameter. 

AuthPass

Specify the password that corresponds to the above-mentioned Username. This parameter once again appears only if the SNMPversion selected is v3.

Confirm Password

Confirm the AuthPass by retyping it here.

AuthType

This parameter too appears only if v3 is selected as the SNMPversion. From the AuthType list box, choose the authentication algorithm using which SNMP v3 converts the specified username and password into a 32-bit format to ensure security of SNMP transactions. You can choose between the following options:

  • MD5 - Message Digest Algorithm
  • SHA - Secure Hash Algorithm
  • SHA224 - Secure Hash Algorithm 224 bit
  • SHA256 - Secure Hash Algorithm 256 bit
  • SHA384 - Secure Hash Algorithm 384 bit
  • SHA512 - Secure Hash Algorithm 512 bit

EncryptFlag

This flag appears only when v3 is selected as the SNMPversion. By default, the eG agent does not encrypt SNMP requests. Accordingly, the this flag is set to No by default. To ensure that SNMP requests sent by the eG agent are encrypted, select the Yes option. 

EncryptType

If the EncryptFlag is set to Yes, then you will have to mention the encryption type by selecting an option from the EncryptType list. SNMP v3 supports the following encryption types:

  • DES - Data Encryption Standard
  • 3DES - Triple Data Encryption Standard
  • AES - Advanced Encryption Standard
  • AES128 - Advanced Encryption Standard 128 bit
  • AES192 - Advanced Encryption Standard 192 bit
  • AES256 - Advanced Encryption Standard 256 bit

EncryptPassword

Specify the encryption password here.

Confirm Password

Confirm the encryption password by retyping it here.

Timeout

Specify the duration (in seconds) within which the SNMP query executed by this test should time out in this text box. The default is 10 seconds.

Data Over TCP

By default, in an IT environment, all data transmission occurs over UDP. Some environments however, may be specifically configured to offload a fraction of the data traffic – for instance, certain types of data traffic or traffic pertaining to specific components – to other protocols like TCP, so as to prevent UDP overloads. In such environments, you can instruct the eG agent to conduct the SNMP data traffic related to the monitored target over TCP (and not UDP). For this, set this flag to Yes. By default, this flag is set to No.

Engine ID

This parameter appears only when v3 is selected as the SNMPVersion. Sometimes, the test may not report metrics when AES192 or AES256 is chosen as the Encryption type. To ensure that the test report metrics consistently, administrators need to set this flag to Yes. By default, this parameter is set to No.
Measurements made by the test
Measurement Description Measurement Unit Interpretation

Operational status

Indicates the current operational status of this application server.

 

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure Value Numeric Value
Active 1
Not in Service 2
No New Sessions 3
In Recovery 4

Note:

This test typically reports the Measure Values listed in the table above to indicate the current operational status of each application server. However, the graph of this measure is represented using the numeric equivalents only i.e., 1 to 4.

Admin status

Indicates the administrative status of this application server.

 

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure Value Numeric Value
Enabled 1
Disabled 2
Shutdown 3

Note:

This test typically reports the Measure Values listed in the table above to indicate the current administrative status of this application server. However, the graph of this measure is represented using the numeric equivalents only i.e., 1 to 3.

Users currently accessing server

Indicates the number of users currently accessing this application server.

Number

This measure is a good indicator of the load on the application servers.

Compare the value of this measure across application servers to identify the application server that is accessed by maximum number of users.

An unusually high value for this measure is a cause of concern and may sometimes attribute to a malware attack on the application server.

Frames transmitted

Indicates the rate at which frames were transmitted from this application server during the last measurement period.

Frames/second

Compare the value of this measure across application servers to identify the application server that is transmitting maximum number of frames per second.

Server bandwidth

Indicates the bandwidth of this application server.

Percent

Compare the value of this measure across application servers to identify the application server that is consuming maximum bandwidth.