Patent ID: 9124526
Filing Date: 2015-09-01
Classification: H04L

Abstract:
1. A switch system comprising: a first switch configured to include a flow table, input a communication data from an input link, check whether the communication data is matched with any of at least one flow entry registered in the flow table in the first switch, as a result of the check, and forward the communication data based on a forwarding procedure defined by the matched flow entry when the communication data is matched; a second switch belonging to a switch group same with the first switch and configured to include a flow table; and a control server configured to register a flow entry in the flow table in the first switch wherein the first switch is configured to forward the communication data to a switch, which belongs to the switch group same with the second switch and is connected via the between-switches link, when the communication data is not matched with any of at least one flow entry registered in the flow table in the first switch, wherein the second switch is configured to receive the communication data from the first switch via the between-switches link, check whether the communication data is matched with any of at least one flow entry registered in the flow table in the second switch, as a result of the check, and forward the communication data based on a forwarding procedure defined by the matched flow entry, when the communication data is matched, and wherein the control server is configured to register the flow entry which was to be registered in the first switch in the flow table in the second switch, when the flow table in the first switch becomes impossible to register a flow entry.