A server system performs error detection on a hop-by-hop basis at multiple compute nodes, thereby facilitating the detection of a compute node experiencing failure. The server system communicates a packet from an originating node (the originating node) to a destination node by separating the packet into multiple flow control digits (flits) and routing the flits using a series of hops over a set of intermediate nodes. The packet's final flit includes error detection information, such as checksum data. As each intermediate node receives the final flit, it performs error detection using the error detection information. The pattern of nodes that detect an error indicates which intermediate node has experienced a failure.