Core Builder Test

This test monitors critical metrics relating to each of the network interfaces of a 3 COM CoreBuilder switch.

Target of the test : A 3COM CoreBuilder switch

Agent deploying the test : An external agent

Outputs of the test : One set of results for each interface.

Configurable parameters for the test
Parameters Description

Test period

How often should the test be executed


The IP address of the host for which this test is to be configured.


The port at which the monitored target exposes its SNMP MIB; the default is 25.


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.


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.


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. 


This parameter appears only when v3 is selected as the SNMPVERSION. An SNMP context is a collection of management information accessible by an SNMP entity. An item of management information may exist in more than one context and an SNMP entity potentially has access to many contexts. A context is identified by the SNMPEngineID value of the entity hosting the management information (also called a contextEngineID) and a context name that identifies the specific context (also called a contextName). If the Username provided is associated with a context name, then the eG agent will be able to poll the MIB and collect metrics only if it is configured with the context name as well. In such cases therefore, specify the context name of the Username in the Context text box.  By default, this parameter is set to none.


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.


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


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. 


If this 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


Specify the encryption password here.

Confirm Password

Confirm the encryption password by retyping it here.


If this flag is set to Yes, then only the network interfaces that are operational - i.e. whose MIB-II operStatus variable has a value "up" - are monitored. If this flag is set to No, all network interfaces that have an adminStatus of "up" will be monitored.


If this value is Yes, then it indicates that all interfaces are full duplex. In this case, the eG Enterprise system will compute bandwidth usage % to be, max(input bandwidth, output bandwidth)*100/total speed. On the other hand, if this flag is set to No, then the computation of bandwidth usage % will be (input bandwidth + output bandwidth)*100/total speed.


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.

Measurements made by the test
Measurement Description Measurement Unit Interpretation


Indicates the availability of a network interface.


This value is 100 if an interface is operational - i.e., has an operStatus of "up". The value is 0 otherwise. 

Data transmit rate

Indicates the rate of data being transmitted from the network interface over a network link.


This measurement depicts the workload on a network link.

Data received rate

The rate of data being received by the network interface over a network link.


This measure also characterizes the workload on a network link.


Speed of the network interface.


Some network interface may dynamically change their speed over time - based on external factors/settings. By tracking the speed of an interface over time, an administrator can be aware of such speed changes. 

Bandwidth usage

Indicates the percentage utilization of the bandwidth available over a network link.


A value close to 100% indicates a network bottleneck.


The speed of a network interface is based on the value of its SNMP MIB-II variable, which is set using router-specific commands (e.g., the "bandwidth" command of a Cisco router). When a network interface has a fixed maximum speed limit (e.g., Ethernet), the percentage bandwidth will be <= 100%.

In some instances, service providers offer a minimum committed information rate (CIR). In such cases, the speed of the network interface is not fixed and may be set to the minimum CIR.  Since user traffic may be in excess of the CIR at times, the percentage bandwidth measure could exceed 100%. In such cases, the percentage bandwidth measure is to be ignored.