A method that includes retrieving a first list of routing prefixes learned by a border node in a first network fabric and retrieving a second list comprising addresses of nodes in a second network fabric. The method also includes generating a dependency mapping based on the routing prefixes in the first list and the addresses in the second list. The dependency mapping indicates that network traffic to the addresses of the nodes in the second network fabric is affected by the border node in the first network fabric. The method further includes, in response to detecting that the border node in the first network fabric has malfunctioned and based on the dependency mapping, generating an alert indicating that network traffic to the addresses of the nodes in the second network fabric is affected by the border node in the first network fabric malfunctioning.