Multi-bridge LAN aggregation

• US 10,530,607 B2
• Filed: 04/29/2015
• Issued: 01/07/2020
• Est. Priority Date: 10/29/2002
• Status: Expired due to Term

• Current Assignee: Cisco Systems, Inc.
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Finn, Norman W.
• Primary Examiner(s): Pezzlo, John
• Application Number:
  US14/699,802
• Publication Number:
  US 20150244542A1
• Time in Patent Office: 1,714 Days
• Field of Search: 370389, 370401, 370419, 370463
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 12/4645 Details on frame tagging routing of packets H04L45/00; support for virtual LAN H04L49/354
• CPC Class Codes: H04L 45/245 Link aggregation, e.g. trunking
• CPC Class Codes: H04L 49/253 using establishment or release of connections between ports
• CPC Class Codes: H04L 49/354 for supporting virtual local area networks [VLAN]

Abstract

A method and system for multi-bridge LAN aggregation is disclosed. The method includes aggregating a plurality of LANs coupling a host to a first and a second intermediate network device. The system includes an intermediate network device. The intermediate network device includes a multi-bridge engine. The multi-bridge engine includes a tunnel engine coupled to a bridge interconnect port and a first physical port.

Claims

1. A method comprising:

operating an intermediate network device as a tunneling network device in a link aggregation configuration, wherein

the intermediate network device comprises

a plurality of ports, comprising

a first physical port, and

a second physical port, and

a multi-bridge engine, coupled to the plurality of ports and comprising

a tunnel engine, and

a bridge forwarding engine configured to process received data, received at one of the plurality of ports, according to one or more protocols,

the second physical port is configured to support a bridge interconnect port, and

the operating comprises

tunneling data between the first physical port and the bridge interconnect port via the tunneling engine, wherein

the tunneling is performed without the bridge forwarding engine processing the data according to the one or more protocols.

2. The method of claim 1, wherein the data is carried in a frame, and the tunneling comprises:

transmitting the frame directly between the first physical port and the bridge interconnect port via the tunnel engine.

3. The method of claim 2, wherein

encapsulating the frame with a multi-bridge tag, wherein

the encapsulating is performed by the bridge interconnect port,

the multi-bridge tag comprises a sub-port identifier, and

the sub-port identifier identifies a sub-port which is to receive the frame.

4. The method of claim 1, wherein

the plurality of ports further comprises

a third physical port, and

the third physical port is configured to support the bridge interconnect port.

5. The method of claim 1, wherein

the second physical port is further configured to support another bridge interconnect port.

6. The method of claim 1, further comprising:

mapping the first physical port as a destination of the bridge interconnect port.

7. The method of claim 6, further comprising:

configuring the tunnel engine to perform the tunneling, wherein

the configuring configures the tunnel engine to transmit the data directly between the first physical port and the bridge interconnect port.

8. The method of claim 1, further comprising:

configuring the multi-bridge engine to provide forwarding functionality and pass-through functionality.

9. The method of claim 8, wherein the configuring the multi-bridge engine to provide the pass-through functionality results in the intermediate network device being configured to operate as the tunneling network device in the link aggregation configuration.

10. The method of claim 9, the configuring the multi-bridge engine to provide the pass-through functionality comprises:

configuring a pass-through path, wherein

the configuring the pass-through path comprises

mapping the second physical port to a virtual port via the tunnel engine.

11. The method of claim 1, further comprising:

configuring the intermediate network device to operate as the tunneling network device in the link aggregation configuration, wherein

the configuring comprises

configuring the tunnel engine to perform the tunneling of the data between the bridge interconnect port and the first physical port without the data being processed by the bridge forwarding engine.

12. The method of claim 1, further comprising:

forwarding the received data between the one of the plurality of ports and one or more other ports of the plurality of ports, wherein

the forwarding comprises

processing the received data according to the one or more protocols, and

the processing the received data is performed by the bridge forwarding engine.

13. The method of claim 1, further comprising:

configuring one or more virtual ports of the bridge interconnect port, wherein the configuring the one or more virtual ports comprises

mapping the second physical port to the one or more virtual ports, and

mapping at least one of the one or more virtual ports directly to another physical port of the plurality of ports, via a tunnel engine.

14. The method of claim 1, further comprising:

link aggregating a physical port of another intermediate network device and the bridge interconnect port; and

link aggregating a first network interface of a host and a second network interface of the host, wherein

the first network interface is coupled to the intermediate network device, and

the second network interface is coupled to the another intermediate network device.

15. The method of claim 14, wherein

the host comprises a virtual network interface,

the virtual network interface having an internet protocol address, and

the virtual network interface comprises the first network interface and the second network interface.

16. An intermediate network device comprising:

one or more processors;

a plurality of ports, comprising

a first physical port, and

a second physical port configured to be configured to support a bridge interconnect port;

a multi-bridge engine, coupled to the one or more processors and the plurality of ports, and comprising

a tunnel engine, and

a bridge forwarding engine configured to process received data, received at one of the plurality of ports, according to one or more protocols;

a computer-readable storage medium coupled to the one or more processors; and

a plurality of instructions, encoded in the computer-readable storage medium and configured to cause the one or more processors to

operate the intermediate network device as a tunneling network device in a link aggregation configuration by virtue of being configured to

cause data to be tunneled between the first physical port and the bridge interconnect port via the tunneling engine, without the bridge forwarding engine processing the data according to the one or more protocols.

17. The intermediate network device of claim 16, wherein the plurality of instructions configured to cause the one or more processors to operate the intermediate network device further comprise instructions configured to cause the one or more processors to:

map the first physical port as a destination of a bridge interconnect port;

receive a first frame via the first physical port; and

in response to the intermediate network device operating as a tunneling network device in the link aggregation configuration when the first frame is received, tunnel the first frame from the first physical port to a second physical port without the first frame being processed by the bridge forwarding engine.

18. The intermediate network device of claim 17, wherein the plurality of instructions configured to cause the one or more processors to operate the intermediate network device further comprise instructions configured to cause the one or more processors to:

receiving a second frame via the second physical port; and

in response to the intermediate network device operating as the tunneling network device in the link aggregation configuration when the second frame is received, tunneling the second frame from the second physical port to the first physical port without the second frame being processed by the bridge forwarding engine.

19. The intermediate network device of claim 16, wherein the intermediate network device is configured to be coupled to:

a second intermediate network device, wherein

the second intermediate network device and the intermediate network device are coupled to one another via an inter-bridge link; and

a host, wherein

a first network interface of the host is coupled to the intermediate network device via a first LAN,

a second network interface of the host is coupled to the second intermediate network device via a second LAN, and

the host comprises a virtual network interface comprises the first network interface and the second network interface.

20. An intermediate network device comprising:

a plurality of ports, comprising

a first physical port, and

a second physical port configured to be configured to support a bridge interconnect port; and

multi-bridge engine means for operating the intermediate network device as a tunneling network device in a link aggregation configuration, wherein

the multi-bridge engine means is coupled to the plurality of ports and comprises

bridge forwarding engine means for processing received data, received at one of the plurality of ports, according to one or more protocols, and

tunnel engine means for tunneling data between the first physical port and the bridge interconnect port, when the intermediate network device is operating as a tunneling network device in a link aggregation configuration, wherein

the tunnel engine means is configured to perform the tunneling the data without the data being processed by the bridge forwarding engine means according to the one or more protocols.