A failed device is identified in a network that includes plural devices. To begin, an attempt is made at communication with a target device. If the attempt at communication with the target device fails, it is determined if the target device has an active neighbor. If the target device has an active neighbor,...http://www.google.ca/patents/US7287192?utm_source=gb-gplus-sharePatent US7287192 - Identifying a failed device in a network
