Browse Prior Art Database

Method to detect service degradation for certain priority classes traffic

IP.com Disclosure Number: IPCOM000255729D
Publication Date: 2018-Oct-11
Document File: 5 page(s) / 142K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present disclosure relates to a method to detect service degradation for certain priority classes traffic. Operations, Administration, and Management (OAM) is an integral part of networks. Connectivity Fault Management (CFM) and Bidirectional Forwarding Detection (BFD) is widely used in Layer 2 networks for OAM. Typically network administrators configure CFM/BFD sessions to monitor services passing through the network. Moreover, short interval CFM/BFD sessions are used to trigger protection switching based upon the fault observed in the data forwarding path. The present disclosure utilizes OAM sessions for per traffic class service degradation detection based upon an amalgamation of priority and sequence numbering. Specific priority class traffic degradation detection is based on BFD/CFM continuity check packets used for fault detection and non-sequenced service degradation detection.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 24% of the total text.

Method to detect service degradation for certain priority classes traffic

ABSTRACT

The present disclosure relates to a method to detect service degradation for certain priority classes traffic.  Operations, Administration, and Management (OAM) is an integral part of networks.  Connectivity Fault Management (CFM) and Bidirectional Forwarding Detection (BFD) is widely used in Layer 2 networks for OAM.  Typically network administrators configure CFM/BFD sessions to monitor services passing through the network.  Moreover, short interval CFM/BFD sessions are used to trigger protection switching based upon the fault observed in the data forwarding path.  The present disclosure utilizes OAM sessions for per traffic class service degradation detection based upon an amalgamation of priority and sequence numbering.  Specific priority class traffic degradation detection is based on BFD/CFM continuity check packets used for fault detection and non-sequenced service degradation detection.

DETAILED DESCRIPTION

The present disclosure relates to a method to detect service degradation for certain priority classes traffic.  Operations, Administration, and Management (OAM) is an integral part of networks.  Connectivity Fault Management (CFM) and Bidirectional Forwarding Detection (BFD) is widely used in Layer 2 networks for OAM.  Typically network administrators configure CFM/BFD sessions to monitor services passing through the network.  Moreover, short interval CFM/BFD sessions are used to trigger protection switching based upon the fault observed in the data forwarding path.  The present disclosure utilizes OAM sessions for per traffic class service degradation detection based upon an amalgamation of priority and sequence numbering.  Specific priority class traffic degradation detection is based on BFD/CFM continuity check packets used for fault detection and non-sequenced service degradation detection.

BFD, CCMs, etc. operate by sending periodic Continuity Check Messages and failure to receive a number of messages result in fault detection.  Generally, BFD and CFM packets are sent with one of the priority class defined by the user, by default highest priority.  But there can be different priority traffic associated with the service/s which rely on the failure detection from underlying OAM protocols such as BFD.

For example, as shown in FIG. 1, Customer Premises Equipment (CPE) CPE-1 and CPE-2 are connected to Provider Edge (PE) nodes M1 and M5 respectively and are forwarding control protocols traffic with priority class 7 and other data traffic with priority classes 2 and 3.  Here, the user has configured either pseudowire (PW) BFD or CFM sessions to monitor the primary and backup path of the service.  And due to inappropriate Quality of Service (QoS) configurations and/or traffic congestion on the primary path, P7 control traffic, and BFD CCs are making through the Multiprotocol Label Switching (MPLS) network, but data traffic with lower pri...