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US 2014/0211798 A1Published application
Method and system for using extension headers to support protocol stack migration
AssigneeLandis+Gyr Innovations, Inc.
InventorsDavid Decker, Vishal Kumar, Jeffrey Shudark
Life of this patent
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Abstract
An IP packet may include an IP header and one or more optional IP extension headers. The packet may contain non-IP protocol data in one of the IP extension headers. An application that uses non-IP protocol data may use the non-IP protocol data from the IP extension header. This allows an application designed for a non-IP protocol stack to operate on a device with an IP protocol stack with minimal modification. The non-IP protocol data may support routing options within a network or sub-network.
Claims24
A method for routing, comprising:
- at a first node in a first network:
- receiving a first packet having a first IP header, a first IP extension header, and a first payload, wherein the first IP extension header includes non-IP protocol data;
- using the non-IP protocol data to select a second node in the first network;
- providing a second packet having a second IP header, a second IP extension header, and a second payload, wherein the second IP extension header includes non-IP protocol data;
- and
- routing the second packet to the second node in the first network;
- and
- at the second node in the first network:
- receiving the second packet;
- providing a third packet having a third IP header, a third IP extension header, and a third payload, wherein the third IP extension header includes non-IP protocol data;
- and
- routing the third packet to a third node outside the first network.
9 more elements
A device in a network, comprising:
- an application layer that includes a first application;
- and
- a plurality of layers below the application layer, wherein one of the layers below the application layer is an IP layer,
- wherein the first application receives a first packet having a first IP header, a first IP extension header, and a first payload from a second device, wherein the first IP extension header includes non-IP protocol data, and wherein the first application uses the non-IP protocol data for routing a second packet having a second IP header, a second IP extension header, and a second payload to a third device in the network.
1 more element
A method for providing an IP packet, comprising:
- receiving, at a second node in a network, a first IP packet from a first node in the network, wherein the first IP packet includes a first IP header, a first IP extension header, and a first payload, wherein the first IP extension header includes non-IP protocol data;
- using at least a portion of the non-IP protocol data to determine whether a first time to live (TTL) value has reached a predetermined threshold;
- if the first TTL value has not reached the predetermined threshold, then using the non-IP protocol data to select a third node in the network;
- providing a second IP packet that includes a second IP header, a second IP extension header, and a second payload, wherein the second IP extension header includes non-IP protocol data including a second TTL value;
- and
- transmitting the second IP packet to the third node;
- if the TTL value has reached the predetermined threshold, then discarding the first IP packet.
4 more elements
A method for routing, comprising:
- at an originating node in a first network:
- providing an originating packet having an IP header, an IP destination extension header, and a payload, wherein the IP destination extension header includes non-IP protocol data;
- and
- routing the originating packet to a first node in the first network;
- at the first node in the first network:
- receiving the originating packet;
- providing a first packet having a first IP header, the IP destination extension header, and a first payload, wherein the IP destination extension header includes the non-IP protocol data of the originating packet;
- using non-IP protocol data available at the first node and different from the non-IP protocol data of the originating packet to select a second node in the first network;
- and
- routing the first packet to the second node in the first network.
7 more elements
Dependencies are inferred from the claim text.