highlights new features and functionality for Release 9.5.1. For detailed
documentation for the configuration as well as limitations of each of these
features, see the
Cisco CPT Configuration
The CPT Release
9.5.1 supports the following software features.
Y.1731 Fault Management and Performance Monitoring
Y.1731 is an extension of the Connectivity Fault Management (CFM). The ITU-T Y.1731 feature provides operations, administration, and maintenance (OAM) functions for fault management and performance monitoring to serve the needs of service providers in a large network.
CPT supports Ethernet Alarm Indication Signal (ETH-AIS), Ethernet Remote Defect Indication (ETH-RDI), and Ethernet Locked Signal (ETH-LCK) functionality for fault detection and isolation.
Y.1731 Performance Monitoring (PM) provides a standard Ethernet PM function that includes measurement of Ethernet frame delay, frame delay variation, frame loss, and frame throughput measurements specified by the ITU-T Y-1731 standard. To measure Service Level Agreement (SLA) parameters such as frame delay or frame delay variation, a small number of synthetic frames are transmitted along with the service to the maintenance end point (MEP).
CPT supports only two–way Ethernet frame Delay Measurement (ETH-DM) in Y.1731 performance monitoring. The CPT system sends, receives, and processes PM frames in intervals of 100 ms (10 frames per second) and 1 second.
CFM must be enabled in the network for Y.1731 to become operational.
Span is a technique of replicating the ingress or egress frames in a specific port to a specified list of destination ports. It is a monitoring feature used to monitor the traffic that is coming in and out of a port, channel group, or an Ethernet Flow Point (EFP). The monitored traffic can be used to debug the network and can also be used by law enforcement agencies.
The span can be configured to monitor ingress traffic, egress traffic, or both. The span source can be a physical port, channel group, or an EFP. The span destination can be a physical port or a channel group.
CPT supports two span modes:
Port Span—In this configuration, the ingress or egress traffic on all the Ethernet Virtual Circuits (EVCs) in the source port or channel group is captured on the destination port or channel group. The pseudowire or tunnel port is not supported as a span destination.
EFP Span—In this configuration, the ingress or egress traffic on the specified EFPs on a particular port or channel group is captured on the destination port or channel group. All types of services such as Multiprotocol Label Switching (MPLS), Virtual Private LAN Service (VPLS), Virtual Private Wire Service (VPWS), xconnect can be monitored. The pseudowire or tunnel port is not supported as a span destination.
Traffic from 1 GE
ports of CPT 50 to CPT 200 or CPT 600 can be prioritized when there is
congestion on the 10 GE interlink ports. CPT provides strict priority queuing
mode. In this mode, the qos-group 7 and qos-group 3 share the same and highest
priority than the remaining six queues. These two queues are scheduled on a
round-robin basis if there is traffic on both these queues. The remaining six
queues are configured in strict priority scheduling mode in the following
order: Qos-group 6, 5, 4, 2, 1, 0.
Support for MSTP
The following MSTP
cards are supported in the CPT 200 and CPT 600 chassis: