Configuring Topology Hiding for the Rx Application

When topology hiding is enabled, Rx AAR, ASR, STR, RAR, AAA, ASA, STA and RAA messages forwarded by the MRA to the network are modified to include the MRA Origin-Host instead of the MPE Origin-Host. Route-Record in RARs are not removed.

If a Rx AAR-U, STR message does not contain a Destination-Host, or contains a Destination-Host set to the MRA identity, a binding lookup is performed based on the available and indexed keys to find the corresponding MPE device. The message is then forwarded to the MPE device with no Destination-Host. If the message contains a Destination-Host set to an identity other than the MRA, the message is routed based on the Destination-Host only.

When the Origin-Host is replaced on a forwarded message, the original Origin-Host is logged at the end of a message when logging the message details.

Note: Rx can only be indexed by the session id when hiding is enabled. As a result, when in the topology hiding mode, the index session id will always be enabled. All relative information in Binding Information can be queried.

To configure topology hiding for the Rx application:

  1. From the MRA section of the navigation pane, select Configuration.

    The content tree displays a list of MRA groups; the initial group is ALL.

  2. From the content tree, select an MRA device.

    The MRA Administration page opens.

  3. Select the MRA tab.

    The current MRA configuration settings are displayed.

  4. Click Modify.

    The Modify MRA page opens.

  5. In the Subscriber Indexing section, ensure that the Index by Session ID option is enabled.
  6. Click Save.
  7. From the MRA tab, click Advanced.
  8. Click Modify to edit the Service Overrides table.
  9. In the Service Overrides section, click Add.
  10. In the Add Configuration Key Value dialogue, enter the following information:
    1. Enter DIAMETERDRA.TopologyHiding.Apps in the Configuration Key field.
    2. Enter Gx, Rx in the Value field.
    3. (Optional) Enter information for this configuration in the Comments field.
  11. Click OK.
  12. In the Service Overrides section, click Add.
  13. In the Add Configuration Key Value dialogue, enter the following information:
    1. Enter DIAMETERDRA.TopologyHiding.Enabled in the Configuration Key field.
    2. Enter true in the Value field.
    3. (Optional) Enter information for this configuration in the Comments field.
  14. Click OK.
  15. Click Save.
The topology hiding settings for the Rx application are configured.
Parent topic: About Configuring a CMP System, MRA and MPE Devices