Ns VLANs Test

The Ns VLANs test monitors the network traffic over each of the VLANs configured on the NetScaler device.

Target of the test : A Citrix NetScaler Appliance

Agent deploying the test : An external agent

Outputs of the test : One set of results for every VLAN configured on the Citrix NetScaler being monitored

Configurable parameters for the test
  1. TEST PERIOD – How often should the test be executed
  2. Host – The host for which the test is to be configured
  3. Port – Refers to the port used by the Citrix NetScaler appliance. By default, this is NULL.
  4. snmpport - The port number through which the monitored component exposes its SNMP MIB.
  5. 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.
  6. SNMPCommunity – The SNMP community name that the test uses to communicate with the target device. This parameter is specific to SNMP v1 and v2 only. Therefore, if the snmpversion chosen is v3, then this parameter will not appear.
  7. 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 the username parameter. 
  8. authpass – Specify the password that corresponds to the above-mentioned username. This parameter once again appears only if the snmpversion selected is v3.
  9. confirm password – Confirm the authpass by retyping it here.
  10. 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
  1. encryptflag – This flag appears only when v3 is selected as the snmpversion. By default, the eG agent does not encrypt SNMP requests. Accordingly, the encryptflag is set to No by default. To ensure that SNMP requests sent by the eG agent are encrypted, select the Yes option. 
  2. 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
    • AES – Advanced Encryption Standard
  1. encryptpassword – Specify the encryption password here.
  2. confirm password – Confirm the encryption password by retyping it here.
  3. timeout – Specify the duration (in seconds) beyond which the SNMP query issues by this test should time out. The default period is 10 seconds.
Measurements made by the test
Measurement Description Measurement Unit Interpretation

Packets received

Indicates the rate at which packets were received on a VLAN during the last measurement period.

Packets/Sec

 

Data receive rate

Indicates the rate at which data was received over a VLAN during the last measurement period.

MB/Sec

 

Packets sent

Indicates the rate at which packets were transmitted on a VLAN during the last measurement p.

Packets/Sec

 

Data transmit rate

Indicates the rate at which data was transmitted over a VLAN during the last measurement period.

MB/Sec

 

Packets dropped

Indicates the packets dropped over a VLAN during the last measurement period.

Number

 

Packet drop ratio

Indicates the percentage of the total packets handled (i.e., sum of the packets received and transmitted) which were dropped during the last measurement period.

Percent

Ideally, this value should be close to 0.