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Event ID: 20105 Source: Router

Source
Level
Description
Unable to load the interface <interface name> from the registry. The following error occurred: There are no routing-enabled ports available for use by the demand dial interface.
Comments
 
As per Microsoft: "This problem occurs when the port that the demand dial interface is configured to use is already in use by another application or service. To resolve the problem, close or disable the application or service that has control of the port that your demand dial interface is configured to use."

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