Patent ID: 9497126
Filing Date: 2016-11-15
CPC Classification: H04L

Claim Text:
1. A communication device, comprising: a memory configured to hold a packet-length table storing, in association with an identifier of a network, a length of a packet to be transmitted to a device belonging to the network; a transmitter configured to obtain a first length from the packet-length table, and to transmit a certain packet to a destination device when a second length is equal to or less than the first length, the first length being a length associated with a network to which the destination device belongs, and the second length being a length of the certain packet; a receiver configured to receive a notification message indicating an address of the destination device and a third length, when the second length is greater than the third length, the third length being a maximum packet length corresponding to a maximum length of a packet that is able to be transmitted to a network included in a route leading to the destination device; and a processor configured to update the first length in the packet-length table to the third length, wherein the packet-length table stores a routing prefix of an address of the destination device and a length of a packet that is able to be transmitted to a network designated by the routing prefix in association with each other, and the processor changes a value of packet length associated with the routing prefix of the address of the destination device to the maximum packet length.