Real-time adaptive processing of network data packets for analysis

• US 9,686,157 B2
• Filed: 10/06/2015
• Issued: 06/20/2017
• Est. Priority Date: 04/08/2010
• Status: Active Grant

• Current Assignee: NetScout Systems Incorporated
• Original Assignee: NetScout Systems Incorporated
• Inventors: Singhal, Anil K., Kelley, Bruce A., Nadkarni, Rajeev, Byrapuram, Narendra, Saraswati, Abhishek, Singhal, Ashwani
• Primary Examiner(s): SINKANTARAKORN, PAWARIS
• Application Number:
  US14/876,725
• Publication Number:
  US 20160028597A1
• Time in Patent Office: 623 Days
• CPC Class Codes: H04L 41/069 using logs of notifications; Post-processing of notifications
• CPC Class Codes: H04L 43/026 using flow identification
• CPC Class Codes: H04L 43/028 by filtering
• CPC Class Codes: H04L 43/062 related to network traffic
• CPC Class Codes: H04L 43/08 Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
• CPC Class Codes: H04L 43/0829 Packet loss
• CPC Class Codes: H04L 43/087 Jitter
• CPC Class Codes: H04L 43/0876 Network utilisation, e.g. volume of load or congestion level
• CPC Class Codes: H04L 43/0882 Utilisation of link capacity
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

A network monitoring system that summarizes a plurality of data packets of a session into a compact session record for storage and processing. Each session record may be produced in real-time and made available during the session and/or after the termination of the session. Depending on protocols, a network monitoring system extracts different sets of information, removes redundant information from the plurality of data packets, and adds performance information to produce the session record. The network monitoring system may retrieve and process a single session record or multiple session records for the same or different protocols to determine cause of events, resolve issues in a network or evaluate network performance or conditions. The session record enables analysis in the units of session instead of individual packets. Hence, the network monitoring system can analyze events, issues or performance of the network more efficiently and effectively.

Claims

1. A method for processing network data for analysis, comprising:

determining, by a network monitoring device coupled to a computer network, a session associated with data packets received by a network monitoring device at a location in a network;

generating a common header summarizing information in headers of a plurality of data packets in the session by the network monitoring device;

generating a unit of payload metadata summarizing information in payloads of the plurality of the data packets in the session by the network monitoring device; and

generating, for each session, a session record for storing the session record, the session record including the common header and the payload metadata by the network monitoring device.

2. The method of claim 1, further comprising determining a protocol associated with the session, information included in the common header or the payload metadata of each session is determined based on a protocol associated with the session.

3. The method of claim 1, wherein the common header and the payload metadata are generated in real-time responsive to receiving data packets for the session from the network.

4. The method of claim 1, further comprising:

generating performance parameters representing performance of the network for transmitting the plurality of the data packets in the session; and

adding the performance parameters in the session record.

5. The method of claim 4, wherein the performance parameters comprise at least one of a packet loss rate, a response time, a number of packets or bytes transmitted, parameters indicative of transmission latency, codec parameters, total transfer time for the session, R-Factor (rating factor), MOS (Mean Opinion Score), a file or page size, a file name, sender/receive information, a total transfer time, a user ID, jitter, and phone number.

6. The method of claim 1, further comprising generating mapping information representing at least one other session associated with the session, the mapping information included in the session record.

7. The method of claim 6, wherein the session and the other session are associated with planes in a same protocol.

8. The method of claim 6, wherein the session is associated with a first protocol and the other session is associated with a second protocol different than the first protocol.

9. The method of claim 1, wherein the session record further stores links to the plurality of the data packets in the session.

10. The method of claim 1, further comprising:

receiving a condition for a set of data packets;

identifying one or more session records matching the condition; and

determining a set of data packets associated with the one or more identified session records.

11. The method of claim 1, wherein the common header comprises fields of the headers that remain unchanged throughout each session.

12. A network monitoring device coupled to a computer network for processing network data for analysis, comprising:

a network interface configured to receive data packets at a location in a network; and

a session tracing engine configured to;

determine a session associated with the received data packets;

generate a common header summarizing information in headers of a plurality of data packets in a session;

generate a unit of payload metadata summarizing information in payloads of the plurality of the data packets in the session; and

generate, for each session, a session record including the common header and the payload metadata.

13. The network monitoring device of claim 12, wherein the session tracing engine is further configured to determine a protocol associated with the session, at least one of the common header and the payload metadata generated based on the protocol.

14. The network monitoring device of claim 12, wherein the session tracing engine is configured to generate the common header and the payload metadata in real-time responsive to receiving data packets for the session from the network.

15. The network monitoring device of claim 12, wherein the session tracing engine is further configured to:

generate performance parameters representing performance of the network for transmitting the plurality of the data packets in the session; and

add the performance parameters in the session record.

16. The network monitoring device of claim 15, wherein the performance parameters comprise at least one of a packet loss rate, a response time, a number of packets or bytes transmitted, parameters indicative of transmission latency, codec parameters, total transfer time for the session, R-Factor (rating factor), MOS (Mean Opinion Score), a file or page size, a file name, sender/receive information, a total transfer time, a user ID, jitter, and phone number.

17. The network monitoring device of claim 12, wherein the session tracing engine is further configured to generate mapping information representing at least one other session associated with the session, the mapping information included in the session record.

18. The network monitoring device of claim 17, wherein the session and the other session are associated with different planes in a same protocol.

19. The network monitoring device of claim 17 wherein the session is associated with a first protocol and the other session is associated with a second protocol different from the first protocol.