Propagation of frame loss information by receiver to sender in an ethernet network

Patent metadata

Field	Value
Publication number	US-10015066-B2
Application number	US-201615072445-A
Country	US
Kind code	B2
Filing date	Mar 17, 2016
Priority date	Feb 4, 2016
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

Systems and methods of propagating frame loss information by a node in an Ethernet network include detecting one or more of service unaware port discards and service aware port discards; determining statistics based on the one or more of service unaware discards and service aware port discards; and transmitting the determined statistics to a sender node through one of a Link Layer Discovery Protocol Data Unit (LLDPDU) and a Link Trace Message (LTM). The LLDPDU and the LTM can include an organization specific Type-Length-Value (TLV) with a TLV information string therein based on the determined statistics and cause of the one or more of service unaware discards and service aware port discards.

First claim

What is claimed is:

1. A method of propagating frame loss information by a node in an Ethernet network, the method comprising:
fetching service unaware discards and service aware port discards, each comprising a number of discards in a monitored interval from zero to an absolute number;
determining statistics based on the service unaware discards and the service aware port discards; and
transmitting the determined statistics to a sender node through a Link Layer Discovery Protocol Data Unit (LLDPDU) for the service aware port discards and a Link Trace Message (LTM) for the service unaware discards, wherein the determined statistics are utilized by the sender node to perform one or more corrective actions responsive to the determined statistics exceeding a threshold,
wherein the service unaware discards are due to one or more of Cyclic Redundancy Check (CRC) mismatch, alignment error, and RUNT frames, prior to mapping packets to associated services, and
wherein the service aware port discards are due to one or more of failure to find a destination, Service level Quality of Service (QoS), and exceeding Service Media Access Control (MAC) limit, during transit over a service in the Ethernet network.

2. The method of claim 1 , wherein the one or more corrective actions comprise one or more of switching to backup Link Aggregation Group member ports, manipulating a blocking port in the Ethernet network, and raising an alarm.

3. The method of claim 1 , wherein the service unaware discards comprise service unaware discards prior to mapping packets to a service.

4. The method of claim 3 , wherein the determined statistics comprise a percentage drop over the monitored interval.

5. The method of claim 1 , wherein the service unaware discards and service aware port discards comprise service aware port discards after mapping packets to a service and in transit through the Ethernet network.

6. The method of claim 5 , wherein the determining is responsive to a loss reported by a frame loss measurement tool and transmission of the LTM comprising an Organization specific TLV.

7. The method of claim 1 , wherein the LTM comprises an organization specific Type-Length-Value (TLV) querying one or more service unaware and service aware discards and a Link Trace Response (LTR) comprises an organization specific Type-Length-Value (TLV) with a TLV information string based on the determined statistics and causes of one or more service unaware and service aware discards.

8. A node adapted to propagate frame loss information in an Ethernet network, the node comprising:
circuitry adapted to fetch service unaware discards and service aware port discards, each comprising a number of discards in a monitored interval from zero to an absolute number;
circuitry adapted to determine statistics based on the service unaware discards and the service aware port discards; and
circuitry adapted to transmit the determined statistics to a sender node through a Link Layer Discovery Protocol Data Unit (LLDPDU) for the service aware port discards and a Link Trace Message (LTM) for the service unaware discards, wherein the determined statistics are utilized by the sender node to perform one or more corrective actions responsive to the determined statistics exceeding a threshold,
wherein the service unaware discards are due to one or more of Cyclic Redundancy Check (CRC) mismatch, alignment error, and RUNT frames, prior to mapping packets to associated services, and
wherein the service aware port discards are due to one or more of failure to find a destination, Service level Quality of Service (QoS), and Service Media Access Control (MAC) limit, during transit over a service in the Ethernet network.

9. The node of claim 8 , wherein the one or more corrective actions comprise one or more of switching to backup Link Aggregation Group member ports, manipulating a blocking port in the Ethernet network, and raising an alarm.

10. The node of claim 8 , wherein the service unaware discards comprise service unaware discards prior to mapping packets to a service.

11. The node of claim 10 , wherein the determined statistics comprise a percentage drop over the monitored interval.

12. The node of claim 8 , wherein the service unaware discards and service aware port discards comprise service aware port discards after to mapping packets to a service and in transit through the Ethernet network.

13. The node of claim 12 , wherein the statistics are determined responsive to a frame loss measurement and a Link Trace Response (LTR) message transmitted in response to the LTM.

14. An Ethernet network, comprising:
a plurality of interconnected nodes,
wherein the plurality of interconnected nodes each comprises
circuitry adapted to fetch service unaware discards and service aware port discards, each comprising a number of discards in a monitored interval from zero to an absolute number,
circuitry adapted to determine statistics based on the service unaware discards and the service aware port discards, and
circuitry adapted to transmit the determined statistics to a sender node through a Link Layer Discovery Protocol Data Unit (LLDPDU) for the service aware port discards and a Link Trace Message (LTM) for the service unaware discards, wherein the determined statistics are utilized by the sender node to perform one or more corrective actions responsive to the determined statistics exceeding a threshold,

wherein the service unaware discards are due to one or more of Cyclic Redundancy Check (CRC) mismatch, alignment error, and RUNT frames, prior to mapping packets to associated services, and
wherein the service aware port discards are due to one or more of failure to find a destination, Service level Quality of Service (QoS), and Service Media Access Control (MAC) limit, during transit over a service in the Ethernet network.

Assignees

• Ciena Corp

Inventors

• Mishra Rajneesh
• Vashisht Prashant
• BHARDWAJ Jayant
• Trivedi Vikas

Classifications

• H04L47/728

  for backup paths · CPC title

• H04L41/0816

  the condition being an adaptation, e.g. in response to network events · CPC title

• H04L43/0829 Primary

  Packet loss · CPC title

• Y02D30/30

  Cross-Sectional Technologies · mapped topic

• Y02D30/32

  Cross-Sectional Technologies · mapped topic