Method and system for link switchover

The invention discloses a method and a system for link switchover. According to the method for the link switchover, an alarm message is obtained, wherein the alarm message is sent by a line card through broadcast or multicast, and failure of a link happens in the line card. The link switchover is carried out according to the alarm message. According to the technical scheme of the method and the system for the link switchover, link switchover efficiency in a distributed system is further improved.