One to one public topology mapping and one to N public topology mapping are supported for the Ribbon DSC. These topology mapping scenarios apply to both request and answer Diameter messages. Changes are applied to the host part of the Diameter ID.
Configuring a one to one Topology Mapping Record allows replacement of the DID Host Name, the Realm Name, or both of them with an Alias. The Public DID (Public DID Host + Public Realm) replaces the Private DID (Private DID Host + Private Realm) when this message leaves the Realm and vice versa when the message enters the Real.
Topology One to N Public Mapping
For Mobility Management Entity/Home Subscriber Server (MME/HSS) S6a/S6d and MME/Equipment Identity Register (EIR) S13/S13 message flows, one private to N public obfuscation is supported. In this topology mapping scenario, the Public DID Host Name is a combination of a base value and a numeric suffix. The base value can be shared among multiple rows (records) in the Topology Mapping Table, but the suffix must be unique. The base value must also not end with a digit.
For example, protected Realm “A” contains three Mobile Management Entities (MMEs) each with the same base value “mme” but suffix values “1-5”, “6-10”, “11-15”. Outside Diameter Nodes see the protected DSC Nodes as “mme1” to “mme15”.
To create a Topology Mapping Table
- From the Main Menu, click DSC.
- Click the required DSC Instance (if more than one DSC Instance is defined).
- Click DSC Routing Tables.
- In the Topology Table Selection row, click Create.
- Configure the required attribute.
- Click Create.
Tip
To delete a Topology Mapping Table, click X in the same line that this table appears on the DSC Routing Table Selection screen.
To view a Topology Mapping Table
- From the Main Menu, click DSC.
- Click the required DSC Instance (if more than one DSC Instance is defined).
- Click DSC Routing Tables.
- Click the required Topology Mapping Table.
To create a One to One Public Mapping (Record)
- From the Main Menu, click DSC.
- Click the required DSC Instance (if more than one DSC Instance is defined).
- Click DSC Routing Tables.
- Click the required Topology Mapping Table.
- In the Topology One to One Public Mapping Table Selection row, click Create.
- Do the following:
- In the Private Realm text box, enter the Realm name that contains the protected DSC Node for which you want to obfuscate the internal name.
- In the Private DID Host text box, enter the internal DSC Node name.
- In the Public DID Host text box, enter the placeholder or Alias name that represents this DSC Node outside of its Realm.
- Enter one of the following to the Public Realm text box: keep the Realm by entering the same value as Private Realm, or change to Private Realm by entering the external network.
- Click Create.
Tip
To delete a One to One Topology Mapping Record, click X in the same line that this record appears on the Topology Mapping Table Selection screen.
To create a One to N Public Mapping (Record)
- From the Main Menu, click DSC.
- Click the required DSC Instance (if more than one DSC Instance is defined).
- Click DSC Routing Tables.
- Click the required Topology Mapping Table.
- In the Topology One to N Public Mapping Selection row, click Create.
- Do the following:
- In the Realm text box, enter the Realm name that contains the protected DSC Node for which you want to obfuscate the internal name.
- In the Private DID Host text box, enter the internal DSC Node name.
- In the Public DID Host Prefix text box, enter the base value (placeholder or Alias name) that represents this DSC Node outside of its Realm.
This place value can be shared between records in the Topology Mapping Table and must not end in a digit.
- In the Public DID Host Suffix text box, enter a suffix that is unique to this record.
The input format for the suffix should be <begin> - <end>, where <begin> and <end> are numbers between 1-10000. There can be a difference up to 32 between end and begin. This is the range of suffix values to add to the Public DID Host for this mapping.
- In the Public Realm text box, enter the external network.
- Click Create.
Tip
To delete a One to N Topology Mapping, click X in the same line that this record appears on the Topology Mapping Table Selection screen.
Caution
Do not change a Topology Mapping record that is in use. Changing the values of this record may cause the Diameter session to fail.
- From the Main Menu, click DSC.
- Click the required DSC Instance.
- Click DSC Routing Tables.
- Click the required Topology Mapping Table.
- Click the required One to One Public Mapping Topology Mapping Record.
- Configure the required attributes.
- Click Continue
- From the Main Menu, click DSC.
- Click the required DSC Instance.
- Click DSC Routing Tables.
- Click the required Topology Mapping Table.
- Click the required One to N Public Mapping.
- Configure the required attributes.
- Click Continue.