Oracle Enterprise Manager Installation Guide
Network Topology Generator
For users with an existing SQL*Net installation, the Oracle Network Topology Generator is provided. You should use the Network Topology Generator if you have an existing SQL*Net installation without the SQL*Net configuration tool, Network Manager 3.1.
With the Network Topology Generator, you can:
- Input an existing tnsnames.ora file and generate a topology.ora file.
Note: The tnsnames.ora file must be correctly formatted. Only SQL*Net Version 2 connect strings are accepted.
- Edit an existing topology.ora file.
Note: The topology file creates the relationships between the services, such as databases, and the nodes that they reside on. The tnsnames file identifies the names, but not the types, of the services in the network. When the Network Topology Generator generates a topology file from a tnsnames file, it defaults all services to databases and attempts to create the node name using the network address that is read.
Creating a New topology.ora File
1. To start the Network Topology Generator, double-click on its icon in the Oracle Enterprise Manager program group.
The Input File Type dialog box displays. By default, the tnsnames.ora file is selected.
Attention: The Network Topology Generator can only read a tnsnames.ora or a topology.ora file.
2. Click OK. The SQL*Net Services Name List appears with the current configuration parameters taken from the tnsnames.ora file. You can click on the Browse button to bring up a standard File Open dialog box to search for a tnsnames.ora file if the utility cannot find the file.
Note: If any of the generated entries are incorrect, you need to modify them. See the following section, "Editing an Existing topology.ora File."
3. Click on the Write File button. The Save As dialog box displays with a default filename topology.ora filled in.
4. Click OK to create the new topology.ora file.
5. Click Exit to exit the Topology Generator.
Editing an Existing topology.ora File
The Network Topology Generator also allows you to modify your topology.ora file. You can easily add new entries, edit or delete existing entries.
Adding New Entries
1. Double-click on the Network Topology Generator icon in the Oracle Enterprise Manager program group.
2. Select topology.ora from the Input File dialog box. The Service Name List appears.
3. Click on the Create button. The Network Service Details dialog box appears.
4. Enter a new service name. in the Name entry field.
5. Select a Service Type from the drop down menu. By default ORACLE_DATABASE is selected.
6. Enter a new node name.
7. Enter a new listener name using the format LISTENER_node name.domain name
8. Click OK. The new entry appears in the Service Name column list.
9. Click on the Write File button to display the Save As dialog box. By default, topology.ora is entered in the File Name field.
Warning: Although the Network Topology Generator lets you save your modification to any filename, this utility can ONLY output topology.ora files. Be careful not to overwrite the tnsnames.ora file.
Warning: When you save a file using the default topology.ora filename, the existing topology.ora file is overwritten with a new file containing the modifications. The old topology file is not appended.
Modifying Existing Entries
To edit an existing entry, select an entry from the Service Name multi-column list and click on the Edit button. The Network Service Details dialog box appears with all fields active except the Service Name. Enter the desired parameters and click OK. From the Service Name List dialog box, click the Write button to create a new topology.ora file.
Deleting Entries
To delete an existing entry, select an item from the Service name multi-column list and click on the Delete button. Click on the Write button to create a new topology.ora file.