Patent ID: 7218605
Filing Date: 2007-05-15
Classification: H04L

Abstract:
1. A router for routing a frame, comprising: a first memory; a route-information-receiving unit for receiving route information transmitted by an adjacent router; a route-information-writing unit for storing said information on a route into said first memory; a route-information-transmission control unit for controlling transmission of said information on a route to adjacent routers; a route-information-change-reporting unit for reporting a change in information on a route involving a particular adjacent router to adjacent routers other than said particular adjacent router if information on a route has not been received from said particular adjacent router for at least a predetermined period of time; a relay-processing unit for routing a received frame on the basis of said route information stored in said first memory; a temporary-halt-start-informing unit for transmitting a temporary-halt-start notification message indicating a start of a temporary halt to adjacent routers in the event of said temporary halt; and a temporary-halt-recovery-informing unit for transmitting a temporary-halt-recovery notification message indicating a recovery from a temporary halt to adjacent routers in the event of said recovery from said temporary halt, wherein said temporary halt temporarily halts a process relating to routing including a transmission of said information on a route; and said recovery restarts the process relating to routing including a transmission of said information on a route.