Patent ID: 9137150
Filing Date: 2015-09-15
Classification: H04L

Abstract:
1. A chassis type switch including a plurality of line cards within a chassis, the switch comprising: each of plurality of line cards is configured to detect a failure of other line card, wherein said each of plurality of line cards is configured to transmit periodically a connectivity confirmation frame to other line cards, to receive a connectivity confirmation frame transmitted by the other line cards, and to determine that a failure has occurred in a certain line card when the connectivity confirmation frame transmitted by the certain line card is not received for a predetermined time; and a forced flooding processor included in said each of the plurality line cards and operating such that when, in trying to transfer a received unicast frame to other line card, a failure is detected in the other line card at a transfer destination, the received unicast frame is forcibly transferred to all ports of the line card which received the unicast frame other than a reception port thereof and to all other line cards.