Communication device and communication method
AssigneeAlaxala Networks Corporation
InventorsYasunori Yamamoto, Motohide Noumi, Kohei Oka
Life of this patent
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Abstract
Provided is a communication device in which communication between hosts of a layer 2 network is overlaid on a layer 3 network. The communication device manages a first MTU length of each communication path with respect to a plurality of communication paths in the layer 3 network, determines a second MTU length based on information to be added in cases where communication between the hosts of the layer 2 network is overlaid via the plurality of communication paths, and notifies the hosts of the second MTU length.
Claims6
A communication device in which communication between hosts of a layer 2 network is overlaid on a layer 3 network,
- wherein the communication device is a gateway device that transmits and receives packets,
- wherein the communication device manages a first MTU (Maximum Transmission Unit) length of each communication path with respect to a plurality of communication paths in the layer 3 network, determines a second MTU length based on information to be added in cases where communication between the hosts of the layer 2 network is overlaid via the plurality of communication paths,
- wherein in cases where, in the communication device, a packet length after adding the information to be added to a packet received from the hosts exceeds the first MTU length, the communication device notifies the hosts that transmitted the packet of the second MTU length with a message respectively having a source address set as a destination address of the packet and a destination address set as a source address of the packet,
- wherein the second MTU length is included in the message and the message is created based on ICMP (Internet Control Message Protocol) format, and
- wherein the first MTU length is a preset value.
A communication method executed by a gateway device that transmits and receives packets, in which communication between hosts of a layer 2 network is overlaid on a layer 3 network, the communication method executed by the communication device comprising:
- managing a first MTU (Maximum Transmission Unit) length of each communication path with respect to a plurality of communication paths in the layer 3 network;
- determining a second MTU length based on information to be added in cases where communication between the hosts of the layer 2 network is overlaid via the plurality of communication paths;
- and
- in cases where a packet length after adding the information to be added to a packet received from the hosts exceeds the first MTU length, notifying the hosts that transmitted the packet of the second MTU length with a message respectively having a source address set as a destination address of the packet and a destination address set as a source address of the packet
- wherein the second MTU length is included in the message and the message is created based on ICMP (Internet Control Message Protocol) format, and
- wherein the first MTU length is a preset value.
Dependencies are inferred from the claim text.