Packet loopback methods and replacing a destination address with a source address
First Claim
1. A packet switch operating method comprising:
- receiving a packet on a first port of a packet switch, the packet being addressed to a device that is in communication with a second port of forwarding circuitry of the packet switch and the packet having an Ethernet destination address field and an Ethernet source address field, the Ethernet destination address field comprising a first address and the Ethernet source address field comprising a second address;
the forwarding circuitry forwarding the packet to an output queue of the forwarding circuitry, the output queue being associated with a third port of the forwarding circuitry;
after the forwarding of the packet to the output queue, the packet switch modifying the packet so that the Ethernet destination address field comprises the second address instead of the first address; and
looping the modified packet back to the first port of the packet switch.
6 Assignments
0 Petitions
Accused Products
Abstract
Packet switch operating methods and packet switches receive a packet on a first port of the packet switch. The packet is addressed to a device that is in communication with a second port of forwarding circuitry of the packet switch and the packet has an Ethernet destination address field and an Ethernet source address field. The Ethernet destination address field includes a first address and the Ethernet source address field includes a second address. The methods and packet switches also forward the packet to an output queue associated with a third port of the forwarding circuitry, forward the packet from the output queue to the first port, and modify the packet so that the Ethernet destination address field comprises the second address instead of the first address.
21 Citations
26 Claims
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1. A packet switch operating method comprising:
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receiving a packet on a first port of a packet switch, the packet being addressed to a device that is in communication with a second port of forwarding circuitry of the packet switch and the packet having an Ethernet destination address field and an Ethernet source address field, the Ethernet destination address field comprising a first address and the Ethernet source address field comprising a second address; the forwarding circuitry forwarding the packet to an output queue of the forwarding circuitry, the output queue being associated with a third port of the forwarding circuitry; after the forwarding of the packet to the output queue, the packet switch modifying the packet so that the Ethernet destination address field comprises the second address instead of the first address; and looping the modified packet back to the first port of the packet switch. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A packet switch operating method comprising:
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receiving a packet on a first port of a packet switch, the packet being addressed to a device that is in communication with a second port of the packet switch and the packet comprising an Ethernet destination address field and an Ethernet source address field, the Ethernet destination address field comprising a first address and the Ethernet source address field comprising a second address; forwarding the packet to an output queue of the packet switch, the output queue being associated with the second port; modifying the packet so that the Ethernet destination address field comprises the second address instead of the first address; and looping the modified packet back to the first port of the packet switch. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A packet switch operating method comprising:
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receiving a packet on a first port of the packet switch from a first device, the packet being addressed to a second device that is in communication with a second port of the packet switch and the packet having an Ethernet destination address field and an Ethernet source address field, the Ethernet destination address field comprising a first address and the Ethernet source address field comprising a second address; relaying the packet from the first port of the packet switch to forwarding circuitry of the packet switch; the forwarding circuitry transmitting the packet out of a first forwarding circuitry port in communication with the second port of the packet switch; duplicating the packet; modifying the duplicate so that the Ethernet destination address field comprises the second address instead of the first address; and using the first port of the packet switch, transmitting the modified duplicate to the first device. - View Dependent Claims (18, 19, 20, 21)
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22. A packet switch operating method comprising:
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modification circuitry of the packet switch receiving a packet from a first port of forwarding circuitry of the packet switch; the modification circuitry modifying the received packet; looping the modified packet back to the first port of the forwarding circuitry; the forwarding circuitry forwarding the modified packet from the first port of the forwarding circuitry to a second port of the forwarding circuitry; the packet switch forwarding the modified packet from the second port of the forwarding circuitry to a device distinct from the packet switch that is connected to a third port of the packet switch; and wherein the packet comprises an Ethernet destination address field and an Ethernet source address field, the Ethernet destination address field comprises a first address, the Ethernet source address field comprises a second address, and the modifying comprises modifying the packet so that the Ethernet destination address field comprises the second address instead of the first address. - View Dependent Claims (23, 24, 25)
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26. A packet switch operating method comprising:
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modification circuitry of a packet switch receiving a packet from a first port of forwarding circuitry of the packet switch, the packet having an Ethernet destination address field and an Ethernet source address field, the Ethernet destination address field comprising a first address and the Ethernet source address field comprising a second address; the modification circuitry modifying the packet so that the Ethernet destination address field comprises the second address instead of the first address; and using a second port of the packet switch in communication with the first port of the forwarding circuitry, transmitting the modified packet to a first device that is in communication with a second device associated with the second address, the first device being distinct from the packet switch and being connected to the second port of the packet switch wherein the modifying comprises modifying a transport identifier of the packet, adding a transport identifier to the packet, or removing a transport identifier from the packet.
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Specification