Аннотация:In this paper we describe the extended routing rules in the low-latency high-bandwidth Angara interconnect with torus topology. The Angara interconnect supports 4D torus topology with routing based on the direction order routing (DOR) implemented using direction bits and additional first and last steps. To avoid deadlocks in a ring bubble flow control is used. Implementation of the First and Last Steps method allows to violate the DOR rule. We propose an algorithm for generation and analysis of routing tables that guarantees no deadlocks in the Angara interconnect. The proposed algorithm increases the number of different routable systems and improves fault tolerance.