The invention concerns a method of routing a packet in a packet switching network, and a corresponding router (50). A new or an obsolete entry in a routing table is detected. A timer is started. A packet filter is configured having a pass probability which is an increasing or decreasing function of the timer whereby said function is increasing if the detected entry is a new entry and decreasing if the detected entry is an obsolete entry. An incoming packet which matches the detected entry is detected. The detected packet is filtered with the packet filter. If the detected packet passes the packet filter, the detected packet is routed in accordance with the detected entry. If the detected packet does not pass the packet filter, the detected packet is routed in accordance with another entry of the routing table.