Routing exception determination method and device and storage medium

The invention provides a routing exception determination method and device and a storage medium, relates to the technical field of networks, and can reduce resource occupation for determining an exception routing instruction. The method comprises the steps of determining a second time period based on a central moment of a first time period and a preset duration under the condition that an abnormal transmission interface exists in a plurality of transmission interfaces of a core router in the first time period; obtaining a route updating instruction in a second time period, and determining a transmission interface of route information corresponding to the route updating instruction; the routing information comprises original routing information and/or routing updating information obtained after routing updating is carried out on the original routing information based on the routing updating instruction; and under the condition that an abnormal transmission interface exists in the transmission interfaces corres