Why is the source router field empty when configuring the VoIP monitor?

In order to monitor VoIP between two locations, you need to specify the links that you want to monitor using OpManager, that is, specify the source and target. The source router (Cisco router with IP SLA agent enabled) must be discovered in OpManager first. Only if this router is discovered in OpManager with valid SNMP read and write community strings configured, you will see the router listed as a source device and you will be able to pick so that you can successfully add a VoIP monitor.

Please follow these steps to discover a source router in OpManager

  • Go to the source router telnet session and enable snmp read and write communities.
  • Go to Settings > Discovery > Credential Settings > New Enter valid read and write communities which are enabled in the source device.
  • Go To Settings > Discovery > Add Device
    • Go to Settings > Discovery > Credentials
    • Click Add Credential
    • Configure the following parameters and click Save to add the credentials:

Credential Category: Select the relevant category.

  • Monitor: Select this if the credential is to monitor a device.
  • Backup: Select this if the credential is to take backup of device configuration.

Credential Type: Select the relevant protocol.

SNMP v1/SNMPv2: SNMPv1 and SNMPv2 are community based security models. Enter the Credential name and description. Configure the correct Read and Write community, SNMP Port, SNMP Timeout (in seconds) and SNMP Retries.

SNMP v3: SNMPv3 is a user based security model. It provides secure access to the devices by a combination authenticating and encrypting packets over the network. The security features provided in SNMPv3 are Message integrity, Authentication and Encryption. If you select SNMPv3 as the credential type, then configure the following parameters.

  • Name: Enter the name of the credential.
  • Description: Enter a brief description about the credential.
  • User Name: Enter the name of the user (principal) on behalf of whom the message is being exchanged.
  • Context Name: An SNMP context name or "context" in short, is a collection of management information accessible by an SNMP entity. An item of management information may exist in more than one context. An SNMP entity potentially has access to many contexts. In other words, if a management information has been defined under certain context by an SNMPv3 entity, then any management application can access that information by giving that context name. The "context name" is an octet string, which has at least one management information.
  • Authentication: Select any of the authentication protocols either MD5 or SHA and enter the password. MD5 and SHA are processes which are used for generating authentication/privacy keys in SNMPv3 applications.
  • Encryption: Select any of the encryption protocols either DES or EAS-128 and enter the password. Note: Only after configuring Authentication it is possible to configure Encryption.
  • SNMP Port: Enter the SNMP port number.
  • SNMP Timeout: Enter the SNMP timeout in seconds.
  • SNMP Retries: Enter the SNMP retries.

WMI: If you select WMI as the protocol, configure the Domain Name, the User Name, and the Password. Example:- TestDomain\TestUser.Also enter the credential name and description.

Telnet/SSH: Enter the credential name. Select protocol Telnet or SSH. For Telnet, ensure you configure the correct login prompt, command prompt, and password prompt besides the user name, password, port number and timeout (in seconds) to access the device. For SSH, if you select SSH Key Authentication, ensure you configure the user name and choose the SSH Key using the Browse button, and correct command prompt besides the port number and timeout (in seconds) to access the device. 

VMware: Enter the credential name. Provide the HTTPS Username and Password of the Host. Enter the HTTPS web service port number and timeout interval for the connection between the Host and OpManager server.

Citrix: Enter the credential name. Provide the Username and Password of the Host. Enter the web service port number and timeout interval for the connection between the Host and OpManager server.

UCS: Enter the credential name. Provide the UCS Manager Username and Password. Enter the Port, Protocol and Timeout interval for the connection between the UCS and OpManager Server.

Go to VoIP Monitors -- Settings

Select newly added source router and proceed with the configuration.

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