Generalized service protection systems and methods

• US 9,264,254 B2
• Filed: 03/30/2012
• Issued: 02/16/2016
• Est. Priority Date: 03/30/2012
• Status: Active Grant

• Current Assignee: Ciena Corporation
• Original Assignee: Ciena Corporation
• Inventors: Holness, Marc, Shew, Stephen Daniel, Gilson, David
• Primary Examiner(s): Cho, Un C
• Assistant Examiner(s): Deng, Fangyan
• Application Number:
  US13/435,225
• Publication Number:
  US 20130258840A1
• Time in Patent Office: 1,418 Days
• Field of Search: 370/222, 370256-401
• US Class Current: 1/1
• CPC Class Codes: H04B 10/032 using working and protection systems H04J14/0287 takes precedence
• CPC Class Codes: H04J 3/167 interaction with SDH/SONET, e.g. carrying SDH/SONET frames, interfacing with SDH/SONET H04J3/1664 takes precedence
• CPC Class Codes: H04L 12/42 Loop networks
• CPC Class Codes: H04L 12/437 Ring fault isolation or reconfiguration for SDH/SONET ring networks H04J3/085
• CPC Class Codes: H04L 2012/6437 Ring
• CPC Class Codes: H04L 45/22 Alternate routing
• CPC Class Codes: H04L 49/00 Packet switching elements
• CPC Class Codes: H04Q 11/0066 Provisions for optical burst or packet networks
• CPC Class Codes: H04Q 2011/0081 Fault tolerance; Redundancy; Recovery; Reconfigurability

Abstract

A node includes a first port configured to be selectively blocked and unblocked; a second port configured to be selectively blocked and unblocked; a forwarder between the first port and the second port; a management channel between the first port and the second port, wherein the selective blocking and unblocking of the first port and the second port is based on the management channel; and a data channel between the first port and the second port, wherein the data channel utilizes an arbitrary service identifier. A method can include operating a ring with Ring Protection Switching comprising a forwarding mechanism and a blocking mechanism that are independent and decoupled entities therebetween, wherein the ring includes a management channel and a data channel that each utilize an arbitrary service identifier.

Claims

1. A node, comprising:

a first port configured to be selectively blocked and unblocked;

a second port configured to be selectively blocked and unblocked;

a forwarder between the first port and the second port;

a management channel between the first port and the second port, wherein the selective blocking and unblocking of the first port and the second port is based on the management channel; and

a data channel between the first port and the second port, wherein the data channel utilizes an arbitrary service identifier;

wherein the data channel and the management channel are separated into different service identifier name spaces with a service identifier for the management channel being a different type from the arbitrary service identifier for the data channel, wherein G.8032 protection is provided on the data channel using the arbitrary service identifier, wherein the arbitrary service identifier is a non-Virtual Local Area Network (VLAN) Identifier for blocking and unblocking on the data channel using the G.8032 protection.

2. The node of claim 1, wherein the forwarder comprises circuitry configured to forward bearer traffic on the data channel based on Ethernet forwarding logic.

3. The node of claim 1, wherein the forwarder comprises one of circuitry and an optical device configured to forward bearer traffic on the data channel utilizing a non-learning forwarding paradigm.

4. The node of claim 1, wherein the arbitrary service identifier is different from a service identifier associated with the management channel.

5. The node of claim 1, wherein the arbitrary service identifier comprises any of Provider Backbone Bridging Backbone Service Instance Identifier (PBB I-SID), Multiprotocol Label Switching (MPLS) label identifier, Internet Protocol (IP) Differentiated Services Code Point (DSCP), EtherType value, Generic Framing Protocol (GFP) protocol identifier (PID), Time Division Multiplexing (TDM) bearer traffic identifiers, Optical Transport Network (OTN) service identifiers, wavelength identifiers, and a combination thereof.

6. The node of claim 1, wherein the selective blocking and unblocking of the first port and the second port is based on the arbitrary service identifier.

7. The node of claim 1, wherein the forwarder is configured to forward traffic on both the management channel and the data channel based on a plurality of arbitrary service identifiers.

8. The node of claim 7, wherein the forwarder is configured with a virtual forwarding instance per arbitrary service identifier.

9. The node of claim 8, wherein the virtual forwarding instance conforms to an IEEE 802.1Q forwarding process.

10. The node of claim 8, further comprising:

circuitry to detect a failure associated with one of the plurality of arbitrary service identifiers based on monitoring the management channel;

wherein the virtual forwarding instance is configured to remove forwarding entries associated with the one of the plurality of arbitrary service identifiers upon detection of the failure.

11. The node of claim 10, wherein the virtual forwarding instance is configured to relearn forwarding entries associated with the one of the plurality of arbitrary service identifiers upon the removal of the forwarding entries.

12. The node of claim 7, wherein the forwarder is configured with a non-learning based forwarding system that forwards data between the first port and the second port based on predetermined rules.

13. The node of claim 12, wherein the forwarder comprises one of an optical routing device, an electrical Time Division Multiplexing (TDM) switch fabric, and a packet switch where learning is disable effectively resulting in all received frames being forwarded out all associated egress ports.

14. The node of claim 1, wherein the data channel and the management channel are separated therebetween into different instances of a same service identifier name space.

15. The node of claim 1, wherein the node operates Ethernet Ring Protection Switching with the data channel utilizing a different service identifier than the management channel.

16. A network, comprising:

a plurality of interconnected nodes forming one of a logical ring and a physical ring;

a first virtual ring on the plurality of interconnected nodes, wherein the first virtual ring comprises a bearer channel and a G.8032 ring automatic protection switching (R-APS) channel, and wherein the bearer channel and the R-APS channel each use a different service identifier space; and

a first selectively enabled channel block on the first virtual ring;

wherein each of the plurality of interconnected nodes comprise a forwarding mechanism, and wherein the forwarding mechanism is independent of the first selectively enabled channel block; and

wherein the R-APS channel and the bearer channel are separated into different service identifier name spaces with a service identifier for the the R-APS channel being a different type from the arbitrary service identifier for the bearer channel, wherein G.8032 ring automatic protection switching is provided on the bearer channel using the arbitrary service identifier, wherein the arbitrary service identifier is a non-Virtual Local Area Network (VLAN) Identifier for blocking and unblocking on the bearer channel using the G.8032 ring automatic protection switching.

17. A method, comprising:

operating a ring with G.8032 Ring Protection Switching comprising a forwarding mechanism and a blocking mechanism that are independent and decoupled entities there between, wherein the ring comprises a management channel and a data channel that each utilize an arbitrary service identifier, and wherein the management channel and the data channel are separated into different service identifier name spaces with a service identifier for the management channel being a different type from the arbitrary service identifier for the data channel, wherein G.8032 Ring Protection Switching is provided on the data channel using the arbitrary service identifier, wherein the arbitrary service identifier is being a non-Virtual Local Area Network (VLAN) Identifier for blocking and unblocking on the data channel using G.8032 Ring Protection Switching;

detecting a failure affect a ring span;

installing channel blocks adjacent to the failure;

transmitting fault indication messages on the ring;

upon receiving the fault indication messages, removing any channel blocks on the ring besides the channel blocks adjacent to the failure.

18. The method of claim 17, wherein the arbitrary service identifier comprises any of Provider Backbone Bridging Backbone Service Instance Identifier (PBB I-SID), Multiprotocol Label Switching (MPLS) label identifier, Internet Protocol (IP) Differentiated Services Code Point (DSCP), EtherType value, Generic Framing Protocol (GFP) protocol identifier (PID), Time Division Multiplexing (TDM) bearer traffic identifiers, Optical Transport Network (OTN) service identifiers, wavelength identifiers, and a combination thereof.

19. The method of claim 17, wherein the forwarding mechanism comprises circuitry configured to forward bearer traffic on the data channel based on Ethernet forwarding logic.

20. The method of claim 17, wherein the forwarding mechanism comprises one of circuitry and an optical device configured to forward bearer traffic on the data channel utilizing a non-learning forwarding paradigm.