Segment routing extension headers
AssigneeCisco Technology, Inc.
InventorsStefano B. Previdi, Clarence Filsfils
Life of this patent
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Abstract
A system and method are disclosed for using segment routing (SR) in native IP networks. The method involves receiving a packet. The packet is an IP packet and includes an IP header. The method also involves updating the packet. Updating the packet involves writing information, including a segment routing segment identifier, to the destination address of the packet.
Claims18
A method comprising:
- receiving a packet at a node, wherein the packet comprises an internet protocol (IP) header, which comprises a first extension header, wherein the first extension header comprises a first list of elements, wherein each of the elements in the first list comprises a respective segment identifier (SID);
- updating the packet, wherein the updating comprises adding a new element to the first list of elements;
- wherein the new element comprises a segment identifier (SID) that identifies the node.
A non-transitory computer readable memory (CRM) comprising instructions that are executable by a processor of a node in a network, wherein a method is implemented in response to executing the instructions, the method comprising:
- receiving a packet at the node, wherein the packet comprises an internet protocol (IP) header, which comprises a first extension header, wherein the first extension header comprises a first list of elements, wherein each of the elements in the first list comprises a respective segment identifier (SID);
- updating the packet, wherein the updating comprises adding a new element to the first list of elements;
- wherein the new element comprises a segment identifier (SID) that identifies the node.
A system comprising:
- a node configured to
- receive a packet, wherein the packet comprises an internet protocol (IP) header, which comprises a first extension header, wherein the first extension header comprises a first list of elements, wherein each of the elements in the first list comprises a respective segment identifier (SID);
- update the packet, wherein the updating comprises adding a new element to the first list of elements;
- wherein the new element comprises a segment identifier (SID) that identifies the node.
Dependencies are inferred from the claim text.