A method for use in a communication network, wherein said method comprises the steps of: (i) providing a plurality of network processing units, NPUs, (A-D) comprised in said communication network; and wherein said method is characterized in that it further comprises the following steps: (ii) establishing a replication of at least one of said plurality of network processing units (A,2 D,2); (iii) arranging the plurality of network processing units and the at least one replication, in a virtual ring configuration; (iv) associating a unique primary virtual identification and a corresponding unique backup virtual identification with each active and available network processing unit (H(A,1), H(B,1), H(C,1), H(D,1)) and the at least one replication (H(A,2), H(D,2)); (v) establishing a list of hash values, associated with the primary virtual identifications of said active and available network processing units and hash values associated with the backup virtual identification of corresponding active and available network processing units (H(A,2), (H(D,1), H(A,1), H(C,1), H(D,2), H(B,1)); (vi) implementing a ring consistent hashing algorithm for carrying out a search resolution for a consistent hashing (K, H); and (vii) in a case of a change in at least one of the active and available network processing units having a certain unique primary virtual identification (H(C,1)) (0,1), using the corresponding backup virtual identification (H(D,2)) to maintain the ring continuity. (i) providing a plurality of network processing units, NPUs, (A-D) comprised in said communication network; and wherein said method is characterized in that it further comprises the following steps: (ii) establishing a replication of at least one of said plurality of network processing units (A,2 D,2); (iii) arranging the plurality of network processing units and the at least one replication, in a virtual ring configuration; (iv) associating a unique primary virtual identification and a corresponding unique backup virtual identification with each active and available network processing unit (H(A,1), H(B,1), H(C,1), H(D,1)) and the at least one replication (H(A,2), H(D,2)); (v) establishing a list of hash values, associated with the primary virtual identifications of said active and available network processing units and hash values associated with the backup virtual identification of corresponding active and available network processing units (H(A,2), (H(D,1), H(A,1), H(C,1), H(D,2), H(B,1)); (vi) implementing a ring consistent hashing algorithm for carrying out a search resolution for a consistent hashing (K, H); and (vii) in a case of a change in at least one of the active and available network processing units having a certain unique primary virtual identification (H(C,1)) (0,1), using the corresponding backup virtual identification (H(D,2)) to maintain the ring continuity. (ii) establishing a replication of at least one of said plurality of network processing units (A,2 D,2); (iii) arranging the plurality of network processing units and the at least one replication, in a virtual ring configuration; (iv) associating a unique primary virtual identification and a corresponding unique backup virtual identification with each active and available network processing unit (H(A,1), H(B,1), H(C,1), H(D,1)) and the at least one replication (H(A,2), H(D,2)); (v) establishing a list of hash values, associated with the primary virtual identifications of said active and available network processing units and hash values associated with the backup virtual identification of corresponding active and available network processing units (H(A,2), (H(D,1), H(A,1), H(C,1), H(D,2), H(B,1)); (vi) implementing a ring consistent hashing algorithm for carrying out a search resolution for a consistent hashing (K, H); and (vii) in a case of a change in at least one of the active and available network processing units having a certain unique primary virtual identification (H(C,1)) (0,1), using the corresponding backup virtual identification (H(D,2)) to maintain the ring continuity.