IP Library › Granted Patent US 11,444,807
Granted Patent B2
US 11,444,807 · App. 16/749,008 · Granted Sep 13, 2022

EVPN VPWS FXC local switching connectivity

Inventor: Marc Holness (Nepean, CA)
Assignee: Ciena Corporation
H04L12/4641H04L45/245H04L45/28H04L45/50H04L45/66
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Quick Facts
Patent No.
US 11,444,807
App. No.
16/749,008
Granted
Sep 13, 2022
Kind
B2
Abstract

A network element configured to implement an Ethernet Virtual Private Network (EVPN) Virtual Private Wire Service (VPWS) Flexible Cross-Connect (FXC) local switching service includes a plurality of ports; and a switching fabric configured to switch traffic between the plurality of ports; wherein a set of ports is configured in a distributed Link Aggregation Group (LAG) with two nodes, and an inter-chassis link configured with a second network element, and wherein, responsive to a failure of the inter-chassis link, a distribution state of members in the distributed LAG is coordinated.

Claims (29)

1. A network element configured to implement an Ethernet Virtual Private Network (EVPN) Virtual Private Wire Service (VPWS) local switching service, the network element comprising:

a plurality of ports; and

a switching fabric configured to switch traffic between the plurality of ports;

wherein a set of ports is configured in a distributed Link Aggregation Group (LAG) with at least two nodes, and an inter-chassis link is configured with a second network element, and

wherein, responsive to a failure of the inter-chassis link, a distribution state of members in the distributed LAG is coordinated utilizing a common VPWS that includes a plurality of members with different Ethernet Segment Instances (ESI) such that all of the plurality of members are configured with a same distribution state.

2. The network element of claim 1 , wherein the distribution state is coordinated based on detection of a member being out-of-distribution.

3. The network element of claim 1 , wherein the distribution state is coordinated by taking all the plurality of members of the common VPWS out-of-distribution when any of the plurality of members is out-of-distribution.

4. The network element of claim 3 , wherein the common VPWS is based on a normalized Virtual Local Area Network (VLAN) Identifier (VID).

5. The network element of claim 1 , wherein the failure of the inter-chassis link is subsequent to a fault affecting a port in the set of ports, where recovery occurs based on the distributed LAG.

6. The network element of claim 5 , wherein the recovery occurs based on the distributed LAG via withdrawal of Ethernet Auto Discovery (AD) routes.

7. The network element of claim 5 , wherein, subsequent to the fault and the failure, corresponding traffic is locally switched between the two nodes.

8. A method, implemented by a network element configured to implement an Ethernet Virtual Private Network (EVPN) Virtual Private Wire Service (VPWS) local switching service, the method comprising:

operating a set of ports in a distributed Link Aggregation Group (LAG) with at least two nodes;

operating an inter-chassis link with a second network element; and

responsive to a failure of the inter-chassis link, coordinating a distribution state of members in the distributed LAG utilizing a common VPWS that includes a plurality of members with different Ethernet Segment Instances (ESI) such that all of the plurality of members are configured with a same distribution state.

9. The method of claim 8 , wherein the distribution state is coordinated based on detection of a member being out-of-distribution.

10. The method of claim 8 , wherein the coordinating includes taking all the plurality of members of the common VPWS out-of-distribution when any of the plurality of members is out-of-distribution.

11. The method of claim 10 , wherein the common VPWS is based on a normalized Virtual Local Area Network (VLAN) Identifier (VID).

12. The method of claim 8 , wherein the failure of the inter-chassis link is subsequent to a fault affecting a port in the set of ports, where recovery occurs based on the distributed LAG.

13. The method of claim 12 , wherein the recovery occurs based on the distributed LAG via withdrawal of Ethernet Auto Discovery (AD) routes.

14. The method of claim 12 , wherein, subsequent to the fault and the failure, corresponding traffic is locally switched between the two nodes.

15. A network configured to implement an Ethernet Virtual Private Network (EVPN) Virtual Private Wire Service (VPWS) local switching service, the network comprising:

a first network element and a second network element each in a distributed Link Aggregation Group (LAG), and with an inter-chassis link between the first network element and the second network element,

wherein, responsive to a failure of the inter-chassis link, a distribution state of members in the distributed LAG is coordinated utilizing a common VPWS that includes a plurality of members with different Ethernet Segment Instances (ESI) such that all of the plurality of members are configured with a same distribution state.

16. The network of claim 15 , wherein the distribution state is coordinated based on detection of a member being out-of-distribution.

17. The network of claim 15 , wherein the distribution state is coordinated by taking all the plurality of members of the common VPWS out-of-distribution when any of the plurality of members is out-of-distribution.

18. The network of claim 17 , wherein the common VPWS is based on a normalized Virtual Local Area Network (VLAN) Identifier (VID).

19. The network of claim 15 , wherein the failure of the inter-chassis link is subsequent to a fault affecting a port in the distributed LAG, where recovery occurs based on the distributed LAG.

20. The network of claim 19 , wherein the recovery occurs based on the distributed LAG via withdrawal of Ethernet Auto Discovery (AD) routes.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 22, 2020
From: HOLNESS, MARC
To: CIENA CORPORATION
Reel/Frame 051581/0088 →
Continuity (1)
Related Publication 20210226816A1 · Jul 22, 2021