Patent ID: 7680114
Filing Date: 2010-03-16
Classification: H04L

Abstract:
1. A forwarding device which forwards a packet, comprising: a packet receiving unit which receives a packet from a port; and an execution decision unit which decides whether to execute filtering on the basis of one of information of a first packet received by said packet receiving unit and input information of said packet receiving unit; a routing information unit storing therein routing information including a set of address information versus destination address of said address information; a destination decision unit searching said routing information unit for output destination information corresponding to a destination of the first packet to decide the output destination information; and a filtering unit searching said routing information unit for filtering information for a source of said packet thereby to decide whether or not to discard the first packet; wherein said execution decision unit decides whether to execute filtering on the basis of the output destination information decided by said destination decision unit; and wherein the output destination information includes an interface number indicating a network to which the first packet is to be output, an output port number indicating a number of a port to which the first packet is to be output, and at least a part of a next hop address indicating an address of a next forwarding device to which the first packet is to be transmitted.