Method and system for associating physical link partners using a layer two mechanism

• US 9,014,017 B2
• Filed: 09/18/2009
• Issued: 04/21/2015
• Est. Priority Date: 07/24/2009
• Status: Expired due to Fees

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Diab, Wael William, Teener, Michael Johas
• Primary Examiner(s): NGUYEN, STEVEN H D
• Application Number:
  US12/562,804
• Publication Number:
  US 20110019689A1
• Time in Patent Office: 2,041 Days
• Field of Search: 370/235, 370/465, 370/401, 370/355, 370/216, 370/468, 370/254, 370/260, 370/338
• US Class Current: 370/252
• CPC Class Codes: H04L 49/3054 Auto-negotiation, e.g. access control between switch gigabit interface connector [GBIC] and link
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: Y02D 30/00 Reducing energy consumption in communication networks

Abstract

A network device and an adjacent network device may autonegotiate for utilization of an OSI layer 2 protocol for exchanging control information. The network device may generate and/or communicate to the adjacent network device, Ethernet frames comprising the control information based on the OSI layer 2 protocol. OSI layer 2 capabilities status and/or MAC address of the adjacent network device may be received and/or stored during auto-negotiation. An Ethertype and/or LLDP Ethertype may be set within the Ethernet frames to indicate utilization of the OSI layer 2 protocol. Payload within the Ethernet frames may be populated with control information that is encapsulated in a non-standardized or standardized discovery protocol frame and/or a LLDPDU. The control information may comprise device capabilities and/or communication parameters. Subsequent Ethernet frames comprising other content may be communicated to the adjacent network device based on the control information.

Claims

1. A method for networking, the method comprising:

in a first of a plurality of network link partners coupled via an Ethernet network link in an Ethernet network;

auto-negotiating with a second network link partner via said Ethernet network link;

during said auto-negotiating, generating one or more tone bursts within a physical layer of said first network link partner, wherein said one or more tone bursts communicates information, said information indicating one or more of;

said first network link partner is operable to communicate based on OSI layer 2 communication;

a MAC address of said first network link partner; and

said first network link partner is operable to exchange device capabilities and/or configuration parameters with said second network link partner based on OSI layer 2 protocol;

transmitting said tone bursts to said second network link partner; and

subsequent to said transmitting said one or more tone bursts, communicating with said second network link partner based on said communicated information, wherein said communicating comprises setting a value of an Ethertype field within an Ethernet frame to indicate that a data unit contained within a payload of said Ethernet frame contains said device capabilities and/or configuration parameters.

2. The method according to claim 1, comprising populating said payload of said Ethernet frame with said device capabilities and/or configuration parameters that are encapsulated based on one or more of a non-standardized discovery protocol, a standardized discovery protocol and/or a link layer discovery packet data unit.

3. A method for networking, the method comprising:

in a first of a plurality of network link partners coupled via an Ethernet network link in an Ethernet network;

during a physical layer 1 auto-negotiation with a second of said plurality of network link partners via said Ethernet network link, transmitting one or more first link code words that each include a plurality of fast link pulse bursts, wherein said one or more first link code words include an indication that said first of said plurality of network link partners is operable to exchange further control information using OSI layer 2 communication;

during said physical layer 1 auto-negotiation, receiving one or more second link code words that each include a plurality of fast link pulse bursts, wherein said one or more second link code words include an indication that said second of said plurality of network link partners is operable to exchange further control information using OSI layer 2 communication; and

subsequent to said physical layer 1 autonegotiation, communicating with said second of said plurality of network link partners based on said OSI layer 2 communication to exchange further control information between said first and second of said plurality of network link partners, wherein said communicating comprises setting a value of an Ethertype field within an Ethernet frame to indicate that a data unit contained within a payload of said Ethernet frame contains said further control information.

4. The method according to claim 3, comprising populating said payload of said Ethernet frame with device capabilities and/or configuration parameters.

5. The method according to claim 4, comprising populating said payload of said Ethernet frame with said device capabilities and/or configuration parameters that are encapsulated based on one or more of a non-standardized discovery protocol, a standardized discovery protocol and/or a link layer discovery packet data unit.

6. A system for networking, the system comprising:

one or more circuits for use in a first of a plurality of network devices coupled via an Ethernet link in an Ethernet network, wherein said one or more circuits are operable to;

during a physical layer 1 auto-negotiation with a second of said plurality of network devices via said Ethernet network link, transmit one or more first link code words that each include a plurality of fast link pulse bursts, wherein said one or more first link code words include an indication that said first of said plurality of network devices is operable to exchange further control information using OSI layer 2 communication;

during said physical layer 1 auto-negotiation, receive one or more second link code words that each include a plurality of fast link pulse bursts, wherein said one or more second link code words include an indication that said second of said plurality of network devices is operable to exchange further control information using OSI layer 2 communication; and

subsequent to said physical layer 1 autonegotiation, communicate with said second of said plurality of network devices based on said OSI layer 2 communication to exchange further control information between said first and second plurality of network devices, wherein said communicating comprises setting a value of an Ethertype field within an Ethernet frame to indicate that a data unit contained within a payload of said Ethernet frame contains said further control information.

7. The system according to claim 6, wherein said first of said plurality of network devices populates said payload of said Ethernet frame with device capabilities and/or configuration parameters.

8. The system according to claim 7, wherein said first of said plurality of network devices encapsulates said device capabilities and/or configuration parameters based on one or more of a non-standardized discovery protocol, a standardized discovery protocol and/or a link layer discovery packet data unit.