Virtual local area network configuration for multi-chassis network element

• US 7,792,017 B2
• Filed: 04/28/2006
• Issued: 09/07/2010
• Est. Priority Date: 06/24/2005
• Status: Active Grant

• Current Assignee: Infinera Corp.
• Original Assignee: Infinera Corp.
• Inventors: Farshchi, Kamran, Lu, Biao, Lim, How Tung, Ravuri, Vinay
• Primary Examiner(s): CHO, HONG SOL
• Application Number:
  US11/380,705
• Publication Number:
  US 20070019642A1
• Time in Patent Office: 1,593 Days
• Field of Search: 370216-220, 370/351, 370/389, 370/392, 370/400, 370/401
• US Class Current: 370/217
• CPC Class Codes: H04L 12/467 Arrangements for supporting untagged frames, e.g. port-based VLANs
• CPC Class Codes: H04L 43/0811 by checking connectivity
• CPC Class Codes: H04L 45/22 Alternate routing
• CPC Class Codes: H04L 45/28 using route fault recovery

Abstract

A system, apparatus, and method for providing a plurality of internal VLANs within a networking element/node are described. Internal VLAN topologies are provisioned so that a particular VLAN(S) communicate traffic to corresponding applications. This segregation of internal traffic across a VLAN topology reduces the amount of interference between the traffic. Redundancy across the VLAN topology is provided so that traffic may be switched to another path in the event of a failure.

Claims

1. A network element node comprising:

a plurality of network ports on which network traffic is received and transmitted;

a switch, coupled to the plurality of network ports, that switches the network traffic to components within the network element node;

a first virtual local area network (“

VLAN”

), located on the switch, having an associated first network port within the plurality of network ports and that switches at least a first portion of the network traffic to a first one of the components;

a second VLAN, located on the switch, having an associated second network port within the plurality of network ports and that switches at least a second portion of the network traffic to a second one of the components;

a first transceiver module;

a second transceiver module, wherein the first VLAN is located on the first transceiver module and the second VLAN is located on the second transceiver module;

a first MAC, located on the first transceiver module and coupled to the first VLAN, on which a third portion of the network traffic is received, the first MAC being associated with a first IP address; and

a second MAC, located on the second transceiver module and coupled to the first VLAN, on which a fourth portion of the network traffic is received, the second MAC being associated with a second IP address, the fourth portion of the network traffic being diverted to the second MAC in the event of a failure,

wherein the first VLAN includes a first redundant path to the second one of the components and the second VLAN includes a second redundant path to the first one of the components, and wherein the first and second IP addresses are the same address and the second IP address is updated in the event of a failure on the first transceiver module.

2. The network element node of claim 1 wherein the first one of the components is an active processor and the second one of the components is a standby processor.

3. The network element node of claim 1 wherein the network element node is a multi-chassis system.

4. The network element node of claim 1 wherein the network element node operates in a long-haul optical network and the switch is an Ethernet switch.

5. The network element node of claim 1 wherein the first and second VLANs operate in transceiver module VLAN topology.

6. A network element comprising:

a plurality of transceiver modules, within a network element node, that transmit and receive network traffic;

a first craft port, on a first transceiver module within the plurality of transceiver modules, on which a craft personal computer may interface and communicate with the network element node;

a first VLAN, located on a switch within the first transceiver module, that receives information from the first craft port;

a second VLAN, located on a second transceiver module within the plurality of transceiver modules, that receives the information from the first VLAN to enable a user to communicate with the second transceiver module;

a third VLAN, located on a third transceiver module within the plurality of transceiver modules, that receives the information from the first VLAN to enable a user to communicate with the third transceiver module;

a first MAC, located on the first transceiver module and coupled to the first VLAN, on which a third portion of the network traffic is received, the first MAC being associated with a first IP address; and

a second MAC, located on the second transceiver module and coupled to the first VLAN, on which a fourth portion of the network traffic is received, the second MAC being associated with a second IP address, the fourth portion of the network traffic being diverted to the second MAC in the event of a failure,

wherein the first and second IP addresses are the same address and the second IP address is updated in the event of a failure on the first transceiver module.

7. The network element of claim 6 wherein the first VLAN, the second VLAN and third VLAN communicate using Ethernet inter-communication connections.

8. A network element comprising:

a first transceiver module;

a second transceiver module;

a first VLAN, located on a first switch within the first transceiver module, that receives network traffic from a client network;

a second VLAN, located on a second switch within the second transceiver module, that receives network traffic from the client network;

a first MAC, located on the first transceiver module and having an associated first IP address, that communicates with the second VLAN via a first peer-to-peer link; and

a second MAC, located on the second transceiver module and having an associated second IP address, that communicates with the first VLAN via a second peer-to-peer link;

wherein the first and second IP addresses are the same address and the second IP address is updated in the event of a failure on the first transceiver module.

9. The network element of claim 8 further comprising a third peer-to-peer link that couples the first VLAN to the second VLAN.

10. The network element of claim 9 wherein the third peer-to-peer link is under a backplane VLAN which is shared by the first and second transceiver modules.

11. The network element of claim 10 wherein the backplane VLAN is associated with a plurality of IP subset addresses that allow communication between the first and second transceiver modules.

12. A network element comprising:

a banding/debanding module that receives or transmits optical signal groups;

a first transceiver module including a first VLAN, the first transceiver module being coupled to the banding/debanding module, the first transceiver module receives and switches, with the first VLAN, first traffic carried by first ones of the optical signal groups;

a second transceiver module including a second VLAN, the second transceiver module being coupled to the first transceiver module, the second transceiver module receives and switches, with the second VLAN, second traffic carried by second ones of the optical signal groups;

a first MAC, located on the first transceiver module and coupled to the first VLAN, on which a third portion of the network traffic is received, the first MAC being associated with a first IP address; and

a second MAC, located on the second transceiver module and coupled to the first VLAN, on which a fourth portion of the network traffic is received, the second MAC being associated with a second IP address, the fourth portion of the network traffic being diverted to the second MAC in the event of a failure,

wherein the first and second IP addresses are the same address and the second IP address is updated in the event of a failure on the first transceiver module.

13. A method for providing redundancy and network traffic segregation within a multi-chassis network node, the method comprising:

receiving a first network stream on a first port;

receiving a second network stream on a second port;

switching the first network stream on a first VLAN to an active component within the multi-chassis network node;

switching the second network stream on a second VLAN to the active component within the multi-chassis network node;

maintaining a first connection of a first redundant path in the first VLAN to a standby component within the multi-chassis network node; and

maintaining a second connection of a second redundant path in the second VLAN to the standby component within the multi-chassis node,

wherein each of a plurality of MACs has a corresponding one of a plurality of IP addresses that allow the switching of the first network stream and the switching of the second network stream, first and second ones of the plurality of IP addresses being the same address and the second one of the plurality of IP addresses is updated in the event of a failure on the first transceiver module.

14. The method of claim 13 wherein the active component is an active processor and the standby component is a standby processor.

15. The method of claim 13 wherein the first port is a craft interface port that allows a craft PC to communicate with a first chassis within the multi-chassis network node.

16. The method of claim 15 wherein the active component and the standby component are located on a second chassis within the multi-chassis network node.

17. The method of claim 13 wherein a communication between the first VLAN and the second VLAN occurs under a backplane VLAN associated with the multi-chassis network node.