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The EMS uses the EMS CALEA user role for all LI configuration operations and the admin user for communicating over netconf to the SBC. The EMS creates the SBC CALEA user credentials automatically when an SBC registers to the EMS. Distributed SBC instances are registered dynamically in the EMS.

Prerequisites

To configure the CDC for an I-SBC instance:

• Instantiate an EMS SWe instance with LI interface support using an appropriate Heat template. For more information, refer to EMS Standalone Instantiation for Geographical Redundancy (GR) DeploymentSteps for Installing EMS SWe on OpenStack Through Horizon GUI.
• Ensure that basic I-SBC configuration is completed as in I-SBC Cluster Configuration using SBC Configuration Manager.
• Enable the EMS CALEA user. For information, refer to Enabling Lawful Intercept on EMS Standalone.

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Configuring CDC using EMS CALEA User Account Configuring CDC using EMS CALEA User Account

Configuring CDC using the EMS CALEA User Account

For LI, CDC configuration is performed using the CDC Configuration Manager through the EMS. You can create CDC information only when logged in as the EMS CALEA user from the EMS CDC configuration window.

Configure Cluster CDC for I-SBC Nodes

To configure a cluster CDC for I-SBC nodes:

1. Log into EMS as an admin user.

2. Click Network > Cluster Management. The Cluster Management / Manage VNFs window opens listing the SBC clusters created on the EMS.

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   0 Figure 1 EMS Cluster/VNF List
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3. Click the radio button adjacent to the name of the cluster you want to configure. The Details tab for the selected cluster opens by default. 

4. Click the Configurations tab. 

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   0 Figure 1 Cluster Configurations Tab
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5. Launch another EMS session as the CALEA user.
6. Under Monitoring, click Lawful Intercept. The Lawful Intercept window is displayed.

7. Click Cluster CDC. The Lawful Intercept/Cluster CDC window is displayed.

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   0 Figure 1 Lawful Intercept/Cluster CDC
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8. Select the I-SBC cluster.

9. Click Launch CDC Configuration Manager. The SBC Configuration Manager window is displayed.

10. Create a call data channel for the I-SBC as described in the following procedure.

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Creating Call Data Channel for M-SBC Creating Call Data Channel for M-SBC

Creating a Call Data Channel for the I-SBC

The SBC SWe provides the ability to configure the IP address, TCP port, and other parameters used for communication towards the mediation server.

To create a new call data channel:

1. In the SBC Configuration Manager window, navigate to Configuration > Intercept > Call Data Channel. The Call Data Channel window is displayed.

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   0 Figure 1 Call Data Channel Window
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2. Select default from the Address Context drop-down menu. You can configure LI using the default Address Context only.

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   0 Figure 1 Call Data Channel for I-SBC
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3. Click New Call Data Channel. The Create New Call Data Channel window is displayed.

4. Specify the following values:

   1. Name: Type the name of the call data channel.

   2. Intercept Standard: Select packetcable from the drop-down menu.

   3. Vendor ID: Select ss8 from the drop-down menu.

   4. RTCP Interception: Select Enabled.

   5. Media IP Interface Group Name: Select the name of the media IP interface group you want to use from the drop-down menu.

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      0 Figure 1 Creating New Call Data Channel
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      0 Table 1 Creating New Call Data Channel Parameters
      Parameter Description Name Specifies the name of the CDC configuration object. Intercept Standard Specifies the intercept standard to use. Vendor Id Specifies the vendor of the LI server. RTCP Interception Specifies whether to intercept RTCP data. The values are: Disabled (default)  Enabled Media IP interface Group Name Select a Media IP interface Group Name.

      
      

5. Click Save. 

6. Click OK.

7. Click Close at the top-right of the SBC Configuration Manager window.

8. Return to the EMS session containing the SBC Configuration Manager for the OAM node and click Apply Saved Changes and Close.

9. When prompted, confirm that you want to save and activate your configuration changes.

Creating Mediation Servers

After the call data channel is created, you must create mediation server objects associated with the call data channel. The CDC configuration supports up to eight mediation servers.

To create a mediation server object:

1. Navigate to Configuration > Intercept > Call Data Channel > Mediation Server. The Mediation Server window is displayed.

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   0 Figure 1 Mediation Server
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2. Select default from the Address Context drop-down menu.

3. Select the Call Data Channel you created for the I-SBC from the drop-down menu.

4. Click New Mediation Server. The Create New Mediation Server window is displayed.

5. Type a mediation server name in Msname.

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   0 Figure 1 Creating New Mediation Server
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6. Click Save. The object is created successfully. You can repeat the steps to create up to eight mediation servers for the I-SBC.

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Mediation Server - Media - TCP Mediation Server - Media - TCP

Mediation Server - Media - TCP

This screen includes the LI Mediation Server TCP Media intercept parameters.

To view TCP parameters:

1. Navigate to Configuration > Intercept > Call Data Channel > Mediation Server > Media > TCP. The TCP window is displayed.

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   0 Figure 1 TCP
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2. Select default from the Address Context drop-down menu.

3. Select the Call Data Channel from the drop down menu.

4. Select the Mediation Server from the drop-down menu. The configuration for the selected server opens.

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   0 Figure 1 Editing TCP - Out of Service
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5. Use the following table to configure the server parameters.

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   title Note:
   The mediation server parameters can only be updated when its State is Disabled and Mode is Out Of Service.

   
   

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   0 Table 1 TCP Parameters
   Parameter  Description IP Address V4 or V6 IPV4/IPV6 address of the mediation server for media interception over TCP.

    

   Port Number Specifies the port number of the mediation server for media interception over TCP. Range is 0 - 65535. DSCP Value Specifies the DSCP value for intercepted media packets sent on TCP port. Default value is 16 and range is 0 - 63. Mode Specifies the mode of the TCP connection towards the mediation server for media interception. The options are: In Service Out of service (default) State Specifies the state of the TCP connection towards the mediation server for media interception. The options are: Disabled (default)  Enabled KA Time Specifies the duration between two keep alive transmissions while in idle condition. The default value is 180. KA Interval Specifies the duration between two successive keep alive re-transmissions, if acknowledgement to the previous keep alive transmission is not received. The default value is 30. KA Probe Specifies the number of re-transmissions to be carried out before declaring that the remote end is not available. The default value is 4.

   
   

6. Click Save.
7. Click OK.
8. Enable the mediation server by changing its State to Enabled and Mode to In Service.
9. Click Save to save the configuration.

10. Click Apply Saved Changes and Close at the top of the SBC Configuration Manager window when you have completed making configuration changes. When prompted, confirm that you want to save and activate your configuration changes. 

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Viewing Statistics for M-SBC Viewing Statistics for M-SBC

Viewing Statistics for I-SBC 

To view mediation server media statistics:

1. Log onto the EMS as the CALEA user.
2. Under Monitoring, click Lawful Intercept. The Lawful Intercept window is displayed.

3. Click Cluster CDC. The Lawful Intercept/Cluster CDC window is displayed.

4. Select the I-SBC cluster.

5. Click View Nodes. The nodes list in the cluster is displayed.

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   0 Figure 1 View Nodes
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6. Select the node to view the mediation server media status and click Launch Node LI Stats. The Mediation Server Media Status window is displayed.

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   0 Figure 1 Mediation Server Media Status