Packet transfer system

1. A packet transfer system, comprising:

a chassis;

a source information handling system (IHS) located in the chassis;

a destination IHS located in the chassis; and

a component interconnect system located in the chassis and providing a memory domain fabric that communicatively couples the source IHS and the destination IHS, wherein the component interconnect system includes:

a routing table including a destination IHS Internet Protocol (IP) address that is associated with the destination IHS and that includes a subnet associated with a domain of the component interconnect system, a destination IHS memory address associated with a memory system in the destination IHS, and a destination IHS port identifier that is associated with a port on the component interconnect system that is connected to the destination IHS; and

a routing engine that is configured to receive, from the source IHS through the memory domain fabric and free of a layer-2 network, a memory domain data packet that encapsulates Transmission Control Protocol/Internet Protocol (TCP/IP) information that includes the destination IHS IP address and, in response, retrieve the destination IP address from the memory domain data packet and use the destination IP address with the routing table to retrieve the destination IHS memory address and the destination IHS port identifier, and use the destination IHS port identifier and the destination IHS memory address to provide the memory domain data packet to the destination IHS through the memory domain fabric and free of a layer-2 network.

2. The packet transfer system of claim 1 , wherein the component interconnect system includes a Peripheral Component Interconnect express (PCIe) system that provides local PCIe connections between the source IHS and the destination IHS.

3. The packet transfer system of claim 1 , wherein the routing engine is configured to automatically retrieve and store each of the destination IHS IP address, the destination IHS memory address, and the destination IHS port identifier in the routing table.

4. The packet transfer system of claim 1 , wherein the memory domain data packet includes transaction layer protocol (TLP) information and data link protocol (DLP) information, and wherein the routing engine is configured to use the TLP information and DLP information to provide the memory domain data packet to the destination IHS.

5. The packet transfer system of claim 1 , wherein the memory domain data packet includes Peripheral Component Interconnect express (PCIe) information.

6. The packet transfer system of claim 1 , wherein the memory domain data packet is free of layer-2 network information.

7. The packet transfer system of claim 1 , wherein each of the source IHS and the destination IHS are server IHSs.

8. An information handling system (IHS), comprising:

a first port that is configured to couple to a first IHS;

a second port that is configured to couple to a second IHS;

at least one processor coupled to each of the first port and the second port; and

a non-transitory memory storing a routing table that includes a first IHS Internet Protocol (IP) address that is associated with the first IHS and that includes a subnet associated with a domain a local interconnect system that includes the first port and the second port, a first IHS memory address associated with a memory system in the first IHS, and a first IHS port identifier that is associated with the first port in the local interconnect system, and wherein the non-transitory memory includes instruction that, when executed by the at least one processor, cause the at least one processor to provide a routing engine that is configured to:

receive, from the second IHS coupled to the second port through a memory domain fabric and free of a layer-2 network, a memory domain data packet that encapsulates Transmission Control Protocol/Internet Protocol (TCP/IP) information that includes the first IHS IP address;

retrieve the destination IP address from the memory domain data packet and use the first IHS IP address with the routing table to retrieve the first IHS memory address and the first IHS port identifier; and

use the first IHS port identifier and the first IHS memory address to provide the memory domain data packet to the first IHS that is coupled to the first port though the memory domain fabric and free of a layer-2 network.

9. The IHS of claim 8 , wherein the local interconnect system further comprises:

Peripheral Component Interconnect express (PCIe) circuitry that provides local PCIe connections between the first IHS and the second IHS.

10. The IHS of claim 8 , wherein the routing engine is configured to automatically retrieve and store each of the first IHS IP address, the first IHS memory address, and the first IHS port identifier in the routing table.

11. The IHS of claim 8 , wherein the memory domain data packet includes transaction layer protocol (TLP) information and data link protocol (DLP) information, and wherein the routing engine is configured to use the TLP information and DLP information to provide the memory domain data packet to the first IHS.

12. The IHS of claim 8 , wherein the memory domain data packet includes Peripheral Component Interconnect express (PCIe) information.

13. The IHS of claim 8 , wherein the memory domain data packet is free of layer-2 network information.

14. The IHS of claim 8 , wherein each of the first IHS and the second IHS are server IHSs that are located in a server chassis.

15. A method for transferring packets, comprising:

providing a routing table including:

a destination IHS Internet Protocol (IP) address that is associated with a destination IHS that is located in a chassis, wherein the destination IHS IP address includes a subnet associated with a domain of a local interconnect system;

a destination IHS memory address associated with a memory system in the destination IHS; and

a destination IHS port identifier that is associated with a port on the local interconnect system that is connected to the destination IHS;

receiving, from a source IHS that is located in the chassis through a memory domain fabric and free of a layer-2 network, a memory domain data packet that encapsulates Transmission Control Protocol/Internet Protocol (TCP/IP) information that includes the destination IHS IP address;

retrieving the destination IP address from the memory domain data packet and using the destination IP address with the routing table to retrieve the destination IHS memory address and the destination IHS port identifier; and

using the destination IHS port identifier and the destination IHS memory address to provide the memory domain data packet to the destination IHS through the memory domain fabric and free of a layer-2 network.

16. The method of claim 15 , wherein the local interconnect system includes a Peripheral Component Interconnect express (PCIe) system that provides local PCIe connections between the source IHS and the destination IHS.

17. The method of claim 15 , further comprising:

automatically retrieving and storing each of the destination IHS IP address, the destination IHS memory address, and the destination IHS port identifier in the routing table.

18. The method of claim 15 , wherein the memory domain data packet includes transaction layer protocol (TLP) information and data link protocol (DLP) information, and wherein the method further comprises:

using the TLP information and DLP information to provide the memory domain data packet to the destination IHS.

19. The method of claim 15 , wherein the memory domain data packet includes Peripheral Component Interconnect express (PCIe) information.

20. The method of claim 15 , wherein the memory domain data packet is free of layer-2 network information.