# Setting Up a Two-Way Direct Connection Using a Predefined Network Topology

You can create a network topology instance in which members of either client group can connect to members of the other client group.

## Before You Begin

- Verify that the client groups that you want to use in the network topology instance are already defined in the CommCell Console or the Command Center.

- You must have Administrative Management permissions on the client groups that you plan to use in the network topology instance.

- Both DMZ servers/infrastructure computers and servers/laptops should be able to open connections to each other on the tunnel port.

## Procedure

1. From the Command Center navigation pane, go to Manage > Network.

2. Click Network topologies.

   The Network topologies page appears.

3. Click Add topology.

   The Add topology dialog box appears.

4. In the Name field, enter a name for this instance of a two-way direct connection.

5. For Client type, select Servers.

6. From the Topology type list, select Two-way.

7. Click Next.

8. From the Servers list, select the server group that will initiate connections with members of the infrastructure computers group.

   Note

   See Using a Smart Network Topology When Setting Up Network Connections.

9. Optional: Click the advanced toggle to edit the following options:

   - Tunnel port. Set this to Default (8403), or enter another port number.

   - Keep-alive interval. The interval (in seconds) for sending keep-alive packets, to maintain the session if backup traffic has an extended pause. Set this to 180 (default), or enter another interval. To avoid idle session timeouts on cloud-based clients, set the interval to 200 seconds or less.

10. From the Backup infrastructure list, select the a server group that will initiate connections with members of the Servers group.

    Note

    See Using a Smart Network Topology When Setting Up Network Connections.

11. Optional: To edit the Tunnel port and Keep-alive interval options, as described in Step 9, above.

12. Click Next.

13. Optional: Edit the following advanced options:

    - Move the Encrypt traffic toggle key to the right to encrypt network traffic (HTTPS).

    - Select Encrypted, Authenticated, Regular, or Raw from the tunnel protocol list.

    - Select the Parallel data transfer streams for long distance networks (default value is 1, and maximum value is 8).

14. Click Submit.

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