Generating Traffic for VoIP Testing

Configure LANforge ports

1. Go to the Port Manager
2. Modify eth2 and eth3 to set a valid network IP address and mask
   1. If your network has DHCP service, you can select the 'DHCP-IPv4' checkbox so that each port is a DHCP client and will acquire its IP address from your DHCP server
3. Verify the port configuration

For more information see LANforge User's Guide: Ports (Interfaces)

Set up Test 1, a Directed VoIP call.

1. Go to the VoIP/RTP tab
2. Click the Create button:
   1. Enter test-1 in the CX Name field
   2. Select the Multi-Call and Directed buttons
   3. Endpoint A is on port eth2 in this example. If you have a PESQ licensed server available, you can select Record and Enable PESQ.
   4. Endpoint B is on port eth3. If you are using PESQ, be sure to enter a Record File and the IP address and port of your PESQ licensed server. Be sure to select the Rcv Call checkbox for this endpoint to receive the call.
   5. Be careful of the VoIP phone number: you might have to format the number as extension@IP-address, E.G.: 5678@192.168.1.10
   6. Click OK to create the VoIP Directed call
3. Verify that the test call is created

For more information see LANforge User's Guide: VoIP Call Generator

Set up Test 2, a Gateway VoIP call.

1. Go to the VoIP/RTP tab
2. Click the Create button:
   1. Enter test-2 in the CX Name field
   2. Select the Multi-Call and Use Gateway buttons
   3. Endpoint A is on port eth2 in this example. Be sure to enter the proper username and password for the endpoint so that it can authenticate with the VoIP Gateway if necessary.
   4. Configure gateway authentication:
      1. To register with the gateway, often the Auth User Name is the phone extension (like 3333).
      2. The call gateway begins with the extension password: pass333@192.168.100.245:5060
   5. Endpoint B is on port eth3. Be sure to select the Rcv Call checkbox for this endpoint to receive the call.
   6. Click OK to create the VoIP Gateway call
3. Verify that the test call is created

For more information see LANforge User's Guide: VoIP Call Generator

Run test-1 and test-2 individually.

1. Select test-1 and click the Start button
2. Go to the VoIP/RTP Endps tab to see detailed results:
   1. The PESQ score will be reported after the first successful call is completed and updated after each subsequent call
   2. NOTE: Endpoints are unregistered while the call is in progress because they are not calling through the VoIP gateway
3. Stop test-1, select test-2 and click Start
4. Go to the VoIP/RTP Endps tab to see detailed results:
   1. PESQ remains 0: 0 when it is disabled for the call in progress
   2. NOTE: Endpoints are registered with the VoIP gateway while the call is in progress
   3. Calls Attempted, Calls Completed and Calls Failed can be viewed by scrolling to the right on the VoIP/RTP Endps tab

For more information see LANforge User's Guide: VoIP Call Generator

Diagnosing Problems

1. If your VoIP endpoint is not going on-hook, check your VoIP gateway to see if the extension is failing to register.
2. Extensions failing to register might be missing name hostname or IP of the voice gateway they are calling.
3. Some gateways want Auth User Name to include the IP or hostname, E.G. 3333@grandstream or 3333@192.168.100.245. Make sure any hostnames are resolvable using nslookup $name or host -v $name.
4. Your VoIP gateway should log when extensions go on-hook, please check the gateway logs
5. Some gateways will not accept direct extension dialing but require extension@gateway style dialing, E.G. the phone number that extension 2222 would call wants to look like 3333@192.168.100.245