Abstract: A method and system of failure detection in a computer network, including pre-programming a number of processors of a multi-processor networked system coupled with remote systems via a network, each of the processors configured to run a BFD module. One processor may be assigned to be an active BFD server to establish sessions between the multi-processor networked system and the remote systems to detect link faults between the multi-processor networked system and the remote systems. Other processors may be assigned as dormant BFD clients. If a link or a processor running the active BFD server fails, one of the dormant BFD clients is selected to become an active BFD server. The BFD server may be dynamically replaced with a dormant client based on predetermined criteria without failure of the BFD server.

Abstract: A method and system of failure detection in a computer network, including pre-programming a number of processors of a multi-processor networked system coupled with remote systems via a network, each of the processors configured to run a BFD module. One processor may be assigned to be an active BFD server to establish sessions between the multi-processor networked system and the remote systems to detect link faults between the multi-processor networked system and the remote systems. Other processors may be assigned as dormant BFD clients. If a link or a processor running the active BFD server fails, one of the dormant BFD clients is selected to become an active BFD server. The BFD server may be dynamically replaced with a dormant client based on predetermined criteria without failure of the BFD server.

Abstract: A network infrastructure device supporting communications on one or more network segments is provided, The network infrastructure device may perform an auto-mode detection for an appropriate unidirectional link detection (UDLD) protocol to be used between network neighbors of the network infrastructure device. The auto-mode detection may include a detection phase to detect a UDLD mode available within a network segment (e.g., supported by a pair of neighboring devices). A first UDLD mode from a set of supported UDLD modes for the network infrastructure device may be sent to neighboring devices; responses may be analyzed; and based on responses (or lack thereof) a mode may be selected, or other supported modes may be attempted, After negotiation, via the detection phase, and operational phase may be entered. A resultant network may have a network infrastructure device that concurrently supports different UDLD modes for different neighboring devices where each was automatically negotiated.