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Administering Diameter Remote Network Elements

This section describes administrative tasks specific to Diameter Remote Network Elements.

To access the Diameter Remote Network Elements panel select Remote Network Elements > Diameter Elements. Select the network element you want to administer, or see Creating and Naming a Diameter or RADIUS Remote Network Element.

Figure 44 shows the main Diameter Network Element dialog.


Figure 44: New Diameter Network Element Dialog

Notice that the dialog is divided into three sections:

The basic steps to configuring a Diameter Remote Network Element include:

Configuring Diameter Connections

Because the Diameter protocol is by its nature peer-to-peer, both incoming and outgoing requests use the same connection. The IMS AAA Server Administrator lets you configure an ordered collection of connections to the remote peers that make up the Remote Network Element. All of these remote peers are considered to be the same network element. For example, a multi-homed server that presents a different Origin-Host for each of its network connections could be represented as a network element consisting of multiple Diameter peers (connections).

Table 18 summarizes the parameters for configuring Diameter connections.

Table 18: Diameter Connection Parameters  
Field
Description

Name

The name of the Diameter connection in the IMS AAA Server.

Description

A description of the connection (optional). The description you associate with a connection is not used during processing.

Host Name

The Origin-Host name of the remote peer.

Require Source IP Match for Connection

This option determines if the source IP address of a connection attempt must match one of the configured IP addresses used to connect to this peer. If this is not selected, traffic will be accepted from any IP address as long as the client presents the correct host name during the capabilities exchange. This functionality allows other peers to exist behind NAT devices.

IP Address

The IP address used for connection.

NOTE: The IMS AAA Server does not support an embedded IPv4 address as an IPv6 address.

Use IPv6 Networking

Enable this option if you are using IPv6 addressing. Leave it disabled if you are using IPv4 addressing.

Port

The port number the remote peer uses for Diameter messages.

Active

If this option is selected, the server periodically attempts to connect (or reconnect after a connection has failed) to the remote peer. If this option is not selected, a connection is established only after the remote peer actively connects to this server.

TCP / SCTP

Selects the protocol used to carry Diameter messages to the remote peer.

If set to TCP, Diameter messages are sent using TCP.

If set to SCTP (Stream Control Transmission Protocol) Diameter messages are sent using SCTP. This allows you to use multiple IP address for a Diameter connection. When the remote peer is running SCTP, the IMS AAA Server accepts packets from any of its IP addresses (that are defined in the Additional IP addresses field).

Additional IP addresses

An ordered set of IP addresses to use for a multi-link connection, in addition to the IP address specified in the "IP Address" field. This feature can only be enabled when using SCTP.


To configure a Diameter connection:

  1. Click New from the New Diameter Network Element dialog.

The New Diameter Connection dialog opens (Figure 45).


Figure 45: New Diameter Connection Dialog
  1. Enter a name for the connection in the Name field.
  1. Enter the Origin-Host name of the remote peer in the Host Name (Origin-Host) field.
  1. Enter the IPv4 address or IPv6 address of the remote peer in the IP Address field.
  1. Enter the port number the remote peer uses for Diameter messages in the Port field.
  2. Enable the Active checkbox if you want the server to actively try to connect to the remote peer.
  3. Select either SCTP or TCP as the protocol used to carry the Diameter messages.
  1. Click OK to save the connection.

The connection is now displayed in the Diameter Connections list.

Repeat these steps for each Diameter connection.

Round Robin and Primary/Backup

The Round Robin and Primary/Backup features are also configured in the New Diameter Network Element dialog. To use either of these features, you must have multiple Diameter connections configured to the Remote Network Element. For a description on the features see Round Robin and Primary/Backup.

  1. From the New Diameter Network Element dialog, select either Round Robin or Primary/Backup.
  2. Define the order of the Diameter connections by selecting each connection and using the Up/Down arrows.
  3. Click OK to save the configuration.

Editing Diameter Connections

You can edit the Diameter connection configuration, or you can edit the order of the connections.

Editing the Diameter Connection Configuration

For details on a specific parameter, refer to the previous sections.

  1. From the main Diameter Network Elements dialog (Figure 37), select the Remote Network Element you want to edit and click Edit.
  2. Select the connection you want to edit from the list of Diameter connections and click Edit.

The Edit Diameter Connection dialog opens (Figure 46):


Figure 46: Edit Diameter Connection Dialog
  1. All fields can be edited except for the connection name. Edit the desired fields and click OK.
  2. Click OK to save the edited connection.
  3. Click OK to save the edited Remote Network Element.

Editing the Round Robin or Primary/Backup Configuration and Re-ordering the Diameter Connections

  1. From the New Diameter Network Element dialog, select either Round Robin or Primary/Backup.
  1. Click OK to save the configuration.

Deleting a Diameter Connection

  1. From the main Diameter Network Elements dialog (Figure 37), select the network element you want to delete the connection from and click Edit.
  2. Select the connection from the list of Diameter Connections and click Delete.
  3. Click OK.

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