This disclosure relates to methods and devices for routing and bearer mapping configuration in an integrated access and backhaul (IAB) network. In one implementation, the method may include detecting, by an IAB entity, a failure in transmitting a packet via an egress link of an original routing path. The method may further include selecting, by the IAB entity, a backhaul adaption protocol routing identifier of a backup routing path for the packet. The method may further include selecting, by the IAB entity, an egress backhaul radio link control channel on an egress link of the backup routing path for transmitting the packet.