System and method for interconnecting physical channels

• US 9,137,177 B2
• Filed: 10/29/2014
• Issued: 09/15/2015
• Est. Priority Date: 02/18/1997
• Status: Expired due to Fees

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Emulex Corporation (Broadcom, Inc.)
• Inventors: Berman, Stuart B.
• Primary Examiner(s): Patel, Jay P
• Application Number:
  US14/526,610
• Publication Number:
  US 20150055950A1
• Time in Patent Office: 321 Days
• Field of Search: 370/404, 370/405, 370/406
• US Class Current: 1/1
• CPC Class Codes: H04L 12/427 with decentralised control
• CPC Class Codes: H04L 12/4637 Interconnected ring systems
• CPC Class Codes: H04L 45/24 Multipath
• CPC Class Codes: H04L 45/30 Routing of multiclass traffic
• CPC Class Codes: H04L 45/745 Address table lookup; Address filtering
• CPC Class Codes: H04L 49/101 using crossbar or matrix
• CPC Class Codes: H04L 49/253 using establishment or release of connections between ports
• CPC Class Codes: H04L 49/254 Centralised controller, i.e. arbitration or scheduling
• CPC Class Codes: H04L 49/3009 Header conversion, routing tables or routing tags
• CPC Class Codes: H04L 49/351 for local area network [LAN], e.g. Ethernet switches
• CPC Class Codes: H04L 49/352 Gigabit ethernet switching [GBPS]
• CPC Class Codes: H04L 49/357 Fibre channel switches
• CPC Class Codes: H04L 49/604 Hybrid IP/Ethernet switches
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04Q 11/0066 Provisions for optical burst or packet networks
• CPC Class Codes: H04Q 2011/0073 Provisions for forwarding or routing, e.g. lookup tables
• CPC Class Codes: H04Q 2011/0092 Ring

Abstract

A system and method for interconnecting physical channels is provided. The system includes a port containing an optical receiver, a port control module, a route determination module, and a connectivity module. The port control module is operably connected to a first physical channel to receive a Fiber Channel frame comprising data and a data header. The route determination module selects a route between the port control module and the second physical channel according to the data header. The connectivity module is operably connected to the port control module and to the route determination module. The connectivity apparatus may switch frames between the port control module and the second physical channel under control of the route determination module in order to transfer Fiber Channel frames to the second physical channel.

Claims

1. An interconnect system for interconnecting a first physical channel and a second physical channel, the interconnect system comprising:

a port operably connected to the first physical channel, the port comprising an optical receiver operable to receive a Fibre Channel frame comprising data and a data header;

a port control module coupled to the port and operable to read the data header;

a route determination module for determining how to route the Fibre Channel frame according to the data header; and

a connectivity module coupled to the port control module and to the route determination module, the connectivity module being operable to route the data in the Fibre Channel frame as determined by the route determination module, whereby data in the Fibre Channel frame are transferred to the second physical channel, wherein the connectivity module is operably connected to a FIFO to receive data from the port, wherein the port control module guards against a receive FIFO overrun condition.

2. The interconnect system of claim 1, wherein the port comprises an optical transmitter.

3. The interconnect system of claim 1, wherein the port supports duplex communication.

4. The interconnect system of claim 1, wherein the port comprises a gigabit interface.

5. The interconnect system of claim 1, wherein the port control module operates according to a transmission protocol.

6. The interconnect system of claim 1, wherein the connectivity module operates according to a signaling protocol.

7. The interconnect system of claim 1, wherein the port control module receives data from the connectivity module that is to be transmitted from the port.

8. A network controller for interconnecting a first physical channel and a second physical channel, the network controller comprising:

a first port operable to transmit data and receive data over the first physical channel;

a second port operable to transmit data and receive data over the second physical channel;

a transmission layer module operably connected to the first port and the second port, the transmission layer module operable to encode data and decode data, wherein the transmission layer module guards against a receive FIFO overrun condition;

a signaling layer module operably connected to the transmission layer module, the signaling layer module operable to control data movement between the first physical channel and the second physical channel, a route for the data movement being determined according to a header within the received data; and

a FIFO operably connected to the signaling layer module, the FIFO operable to buffer received data.

9. The network controller of claim 8, wherein the first port comprises an optical transceiver.

10. The network controller of claim 8, wherein the first port and the second port support duplex communication.

11. The network controller of claim 8, wherein the transmission layer module comprises a port control module.

12. The network controller of claim 8, wherein the signaling layer module comprises a connectivity module.

13. The network controller of claim 8, wherein the transmission layer module receives data from the signaling layer module that is to be transmitted from one of the first port and the second port.

14. The network controller of claim 8, wherein the first physical channel is a Fibre channel and the second physical channel in an Ethernet channel.

15. The network controller of claim 8, wherein the first physical channel is an Ethernet channel and the second physical channel in a Fibre channel.

16. A method for interconnecting a first physical channel and a second physical channel, the method comprising:

receiving data from the first physical channel;

processing the received data according to a transmission layer protocol, the processing prohibiting a receive FIFO overrun condition;

buffering the processed data;

determining a route according to a header within the buffered data; and

if the route comprises the second physical channel, routing the buffered data for transmission over the second physical channel.

17. The method of claim 16, wherein the buffered data is converted to a serial stream prior to transmission.