Distributing Ethernet Alarm Indication Signal Information to Multiple Virtual Local Area Networks

• US 20110194564A1
• Filed: 03/22/2010
• Published: 08/11/2011
• Est. Priority Date: 02/05/2010
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Gupta, Nitin, Shah, Sonal, Finn, Norman William, Ramalingam, Aravindan
• Granted Patent: US 8,547,832 B2
• Time in Patent Office: Days
• US Class Current: 370/395.53
• CPC Class Codes: H04L 12/465 wherein a single frame includes a plurality of VLAN tags
• CPC Class Codes: H04L 12/467 Arrangements for supporting untagged frames, e.g. port-based VLANs
• CPC Class Codes: H04L 41/06 Management of faults, events, alarms or notifications
• CPC Class Codes: H04L 43/0811 by checking connectivity

Abstract

Ethernet Alarm Indication Signal (ETH-AIS) information for multiple Virtual Local Area Networks (VLANs) is consolidated and distributed to the multiple VLANs in a single Ethernet frame. Note, as used herein, “Alarm Indication Signal (ETH-AIS)” refers to an IEEE 802.x or ITU-T Y.1731 Ethernet Alarm Indication Signal. A device receiving the Ethernet frame with the consolidated ETH-AIS information typically forwards the frame out each port that communicates traffic for one of the VLANs included in the consolidated ETH-AIS information.

Claims

1. A method, comprising:

a first network device consolidating Ethernet Alarm Indication Signal (ETH-AIS) information corresponding to a plurality of Virtual Local Area Networks (VLANs) into a single Ethernet frame;

sending, by the first network device, the Ethernet frame to a second network device over a communications link carrying traffic for the plurality of VLANs;

receiving the Ethernet frame by a second network device on a particular port of a plurality of ports of the second network device; and

sending, by the second network device, ETH-AIS information of said received consolidated ETH-AIS information corresponding to each particular VLAN of the plurality of VLANs out each port of the plurality of ports configured for sending packets for the particular VLAN except for the particular port on which said consolidated ETH-AIS information was received.

2. The method of claim 1, wherein a particular plurality of ports includes all ports of the plurality of ports, except for the particular port, configured for sending and receiving packets of at least one of the plurality of VLANs, and wherein said operation of sending includes:

sending said consolidated ETH-AIS information in a single Ethernet frame out each port of the plurality of particular ports.

3. The method of claim 2, wherein said sending said consolidated ETH-AIS information in a single Ethernet frame out each port of the plurality of particular ports includes forwarding said Ethernet frame received by the second network device out each port of the plurality of particular ports.

4. The method of claim 3, wherein the Ethernet frame said received by the second network device is tagged with a particular tag identifying a VLAN different than one of the plurality of VLANs;

and wherein the method includes;

identifying, by the second network device, the particular plurality of ports based on the particular tag.

5. The method of claim 4, programming the second network device with a supervisor VLAN corresponding to the particular VLAN, with the supervisor VLAN including the particular plurality of ports.

6. The method of claim 5, wherein the particular tag is an IEEE 802.1q tag.

7. The method of claim 6, wherein said Ethernet frame sent by the first network device includes the ETH-AIS information in an ITU-T Y.1731 Packet Data Unit (PDU) or according to IEEE 802.1ag.

8. The method of claim 4, wherein the particular tag is an IEEE 802.1q tag.

9. The method of claim 8, wherein said Ethernet frame sent by the first network device includes the ETH-AIS information in an ITU-T Y.1731 Packet Data Unit (PDU) or according to IEEE 802.1ag.

10. The method of claim 3, wherein said Ethernet frame sent by the first network device includes the ETH-AIS information in an ITU-T Y.1731 Packet Data Unit (PDU) or according to IEEE 802.1ag.

11. The method of claim 2, wherein the Ethernet frame said received by the second network device is tagged with a particular tag identifying a VLAN different than one of the plurality of VLANs;

and wherein the method includes;

identifying, by the second network device, the particular plurality of ports based on the particular tag.

12. The method of claim 1, wherein said Ethernet frame sent by the first network device includes the ETH-AIS information in an ITU-T Y.1731 Packet Data Unit (PDU) or according to IEEE 802.1ag.

13. An apparatus, comprising:

a plurality of ports configured for communicating over a plurality of links;

one or more processors and one or more memories;

wherein said one or more processors are configured to perform operations, with said operations including;

consolidating Ethernet Alarm Indication Signal (ETH-AIS) information corresponding to a plurality of Virtual Local Area Networks (VLANs) into a single Ethernet frame; and

sending the Ethernet frame from one of the plurality of ports over a communications link carrying traffic for the plurality of VLANs thereby providing the corresponding ETH-AIS information to one or more devices in each of the plurality of VLANs.

14. The apparatus of claim 13, wherein said Ethernet frame said sent by the apparatus is tagged with a particular tag identifying a VLAN different than one of the plurality of VLANs for use by a receiving network node for identifying a particular plurality of ports from which to forward said ETH-AIS information.

15. The apparatus of claim 14, wherein the particular tag is an IEEE 802.1q tag.

16. The apparatus of claim 15, wherein said Ethernet frame said sent by the apparatus includes the ETH-AIS information in an ITU-T Y.1731 Packet Data Unit (PDU) or according to IEEE 802.1ag.

17. The apparatus of claim 13, wherein said Ethernet frame said sent by the apparatus includes the ETH-AIS information in an ITU-T Y.1731 Packet Data Unit (PDU) or according to IEEE 802.1ag.

18. An apparatus, comprising:

a plurality of ports configured for communicating over a plurality of links;

one or more processors and one or more memories;

wherein said one or more processors are configured to perform operations, with said operations including;

receiving, on a particular port of the plurality of ports, an Ethernet frame including consolidated Ethernet Alarm Indication Signal (ETH-AIS) information corresponding to a plurality of Virtual Local Area Networks (VLANs); and

sending ETH-AIS information of said received consolidated ETH-AIS information corresponding to each particular VLAN of the plurality of VLANs out each port of the plurality of ports configured for sending packets for the particular VLAN except for the particular port.

19. The apparatus of claim 18, wherein the Ethernet frame is tagged with a particular 802.1q tag identifying a particular VLAN different than one of the plurality of VLANs;

and wherein said operation of sending ETH-AIS information of said received consolidated ETH-AIS information corresponding to each particular VLAN of the plurality of VLANs out each port of the plurality of ports configured for sending packets for the particular VLAN except for the particular port includes;

identifying the particular plurality of ports from which to forward said ETH-AIS information based on the particular 802.1q tag, and forwarding said Ethernet frame received by the second network device out each port of the plurality of particular ports.

20. The apparatus of claim 18, wherein the Ethernet frame includes the ETH-AIS information in an ITU-T Y.1731 Packet Data Unit (PDU) or according to IEEE 802.1ag.