How do I create a direct link (logical connection rule) between interfaces on two devices?

To create a logical connection rule

To edit a logical connection rule

To delete a logical connection rule

In SurePath, you can create a direct link between interfaces on two devices, known as Logical Connections. This is a type of topology override rule.

For example, you might want to connect devices managed by different Entuity servers. This would be a unidirectional link, because you are specifying a source device and a destination device. To create a bidirectional link, you must specify two connections and reverse the source and destination devices.

Logical connection rules are intended to assist in path discovery.

To create a logical connection rule:

1. In the Main Menu, click Administration.
2. Click Path Overrides. This opens the Path Overrides page (if you are using ENA v17, this page is called the Application Path Discovery page).
3. Go to the Logical Connections tab and click Add at the bottom of the browser.
4. This will open the Logical Connection window. Enter a name for logical connection rule in the Name field.
5. Enter a description of the rule in the Description field.
6. Tick the Enabled box to activate this override rule.
7. Enter the numerical priority of this override rule in the Priority field - the higher the number, the higher the priority. If you have defined two override rules that are returning results, SurePath would use the override with the higher priority.
8. In the Usage field, click one of the two radio buttons:
   • if you want this rule to only apply if SurePath cannot identify a connection between the interfaces, click Only use this rule if no connection is found in the database.
   • if you want SurePath to use this rule instead of the discovered connection from the device, click Use this rule to override the connection in the database.
9. Browse and specify the source device in the From Device field.
10. If you have selected an IP address in the From Device field, you can enter the zone for the source device in the From Device Zone field.
11. Browse and specify the interface on the source device to which you want to associate the logical connection in the From Interface field.
12. Browse and specify the destination device in the To Device field.
13. If you have selected an IP address in the To Device field, you can enter the zone for the destination device in the To Device Zone field.
14. Browse and specify the interface on the destination device to which you want to associate the logical connection in the To Device field.

To edit a logical connection rule:

1. Navigate to the Logical Connections tab on the Path Overrides (or Application Path Discovery in ENA v17.0) page.
2. Select the logical connection rule that you want to edit and click Edit in the bottom left of the browser.
3. The Logical Connection window will open. When you have made the changes you want, click OK to save, otherwise click Cancel.

To delete a logical connection rule:

1. Navigate to the Logical Connections tab on the Path Overrides (or Application Path Discovery in ENA v17.0) page.
2. Select the logical connection rule that you want to delete and click Delete in the bottom left of the browser.
3. A deletion confirmation window will open. Click Yes to confirm or No to cancel.