Cisco IP SLA Operations Test

This test reports the current state of each operation of the operation type. In addition, this test reports the round trip time of each operation type, packet loss, average latency, count of delayed packets, and packets out of sequence.

Target of the test : A Cisco device

Agent deploying the test : An external agent

Outputs of the test : One set of results for each Cisco IP SLA operation performed on the Cisco device that is monitored.

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.

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 the Username parameter. 

Context

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.

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

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 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

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.

Use Tag Name

 

Measurements made by the test
Measurement Description Measurement Unit Interpretation

Operation status

Indicates the current state of this operation.

 

The values that this measure can report and their corresponding numeric values have been described in the table below

Measure value

Numeric value
OK 1
Down 2, 4, 6 to 16
Critical 3
Unknown 5

Note:

By default, this measure reports one of the Measure Values listed in the table above to indicate the current state of this operation. The graph of this measure however, represents the same using the numeric equivalents mentioned in the table above.

Operation Type Indicates the type of this operation.  

The values that this measure can report and their corresponding numeric values have been described in the table below

Measure value

Numeric value
ICMP Echo 1
Path echo 2
UDP echo 5
TCP connect 6
HTTP 7
DNS 8
DHCP 11
FTP 12
VOIP 13

Note:

By default, this measure reports one of the Measure Values listed in the table above to indicate the type of this operation. The graph of this measure however, represents the same using the numeric equivalents mentioned in the table above.

Round trip time

Indicates the time measured between the start of packet transmission from the source device to the start of receiving the acknowledgment from the destination device for this operation.

Miilliseconds

 

Avg jitter value

Indicates the average variation of response time in receiving the acknowledgment from the destination device for this operation.

Miilliseconds

 

Packets loss

Indicates the total number of packets that were lost during transmission from the source to destination while this operation was performed.

Number

Ideally, the value of this measure should be zero.

Average latency

Indicates the average time taken to transmit the responds from the destination to the source for this operation.

Milliseconds

 

Mean opinion score

Indicates the percentage of speech quality between the source and destination for this operation.

Percent

 

Packets late arrival

Indicates the total number of packets that were received by the destination with delayed arrival for this operation.

Number

 

Packets out of sequence

Indicates the number of packets that were not received in the same order as it was transmitted for this operation.

Number