Patent ID: 9379986
Filing Date: 2016-06-28
CPC Classification: H04L

Claim Text:
1. A network relay device comprising: a plurality of line cards for relaying a frame, each of which has a port, each of the plurality of line cards including: a first processor programmed to limit a communication band of a frame; and a second processor programmed to monitor communicability to/from each of the other line cards by transmitting and receiving an internal monitoring frame to/from each of the other line cards, wherein, when a first line card which is any one of the plurality of line cards receives a frame at the port of its own, the first line card refers to monitoring results obtained by the internal communicability monitoring units of the other line cards in addition to a monitoring result obtained by the second processor of its own, determines the first processor which is a transmission destination from the first processors of the other line cards based on the monitoring results, and transmits the received frame to the transmission destination, and the line card, which has received the frame from the first line card, limits the communication band of the frame by using the first processor of its own, and then, transmits the frame to a predetermined port among the ports of the plurality of line cards.