Wavence statistics support

Introduction

The NFM-P supports the collection of network performance, accounting, and flow-based statistics for Wavence devices. NFM-P also provides statistics for monitoring NFM-P processes and functions. These statistics are typically used to monitor or troubleshoot a network, or to perform SLA or billing functions. Statistics collection can be configured with policies that are distributed to specified network objects.

See the NSP NFM-P Statistics Management Guide for information about the following for Wavence devices:

configuring statistics collection
viewing statistics data in tabular or graphical form
creating graphical representations of statistics data using the Statistics Plotter
supported performance and accounting statistics counters for Wavence devices

Optimized historical statistics collection

NFM-P collects historical statistics at 15-minute and 24-hour intervals. The first set of statistics collected after a Wavence device is managed contains all the historical statistics collected during the time interval. The subsequent historical statistics collected only contain the new statistics and the previously collected data is not duplicated. When the Wavence device connectivity is lost, NFM-P collects all of the uncollected records upon restoration of connectivity. When the Wavence device is unmanaged or suspended, no new records are generated. The first set of statistics is collected after the Wavence device is managed again. When error-free statistics data is collected on the Wavence nodes, the hop history data statistics are incremented.

Note: For a newly discovered node that is already suppressed, no missing statistics are displayed for the first interval.

Elaborated counters and formulas

Table 3-1, Elaborated counters and formulas, lists the elaborated counters and the formulas.

Table 3-1: Elaborated counters and formulas

Class	Counter	Formula
AggrMaintTxStats	Compressed Tx Throughput [Mbps]	{(Total Transmitted Octets after Compression Periodic × 8)+ (Net bandwidth - Available bandwidth)} / Periodic time in seconds / 10⁶
	Tx Compressed Utilization [%]	(Aggregate Compressed Tx Throughput [Mbps] × 100) / Capacity [Mbps]
	Aggregate Tx Throughput [Mbps]	{(Total Transmitted Octets Periodic × 8) + (Net bandwidth - Available bandwidth)} / (Periodic time in seconds) / 10⁶
	Tx Utilization [%]	(Aggregate Tx Throughput [Mbps] × 100) / Capacity [Mbps]
	Discarded Frame Ratio [%]	(Total Discarded Frames Periodic) / (Total Discarded Frames Periodic + Total Transmitted Frames Periodic) × 100
	Compressed Gain [%]	(Aggregated Tx Throughput – Compressed Tx Throughput) * 10^2/Compressed Tx Throughput
AggrPerQueueMaintStats	Aggregate Tx Throughput [Mbps]	{(Total number of Confirming Octets Periodic × 8) + (Net bandwidth - Available bandwidth)} / (Periodic time in seconds) / 10⁶
	Tx Utilization [%]	(Aggregate Tx Throughput [Mbps] × 100) / Capacity [Mbps]
	Tx Discarded Frame Ratio [%]	(Total Discarded Frames Periodic) / (Total Discarded Frames Periodic + Total Transmitted Frames Periodic) × 100
AggrMaintRxStats	Rx Throughput [Mbps]	(Total Received Octets Periodic) × 8 / (Periodic time in sec) / 10⁶
	Rx Utilization [%]	RX Throughput / (Capacity) × 100
	Rx Discarded Frame Ratio [%]	(Total Discarded Frames Periodic) / (Total Discarded Frames Periodic + Total Received Correct Frames Periodic) × 100
PdhFrameHopHistoryDataStats^{1, 2} PdhFrameLinkHistoryDataStats	Link Availability [%]	(1 - (Unavailable Seconds Absolute) / (Elapsed time in seconds) × 100

Note:

Statistics with a suppressed interval of 0 are only available in historical data if current data statistics are enabled.
The Suspect and Suspect Interval Flag attributes are unrelated and may appear independently of each other.
Periodic and per second are not applicable for real-time plotting of the elaborated counters.

Note:

The value of radio port capacity used for computation of relative throughput depends on whether the ACM is preconfigured with or without admission control and chassis types.
The elapsed time is expressed in seconds. If the elapsed time exceeds 900 s for the 15 min interval or 86400 s for the 24 hour interval, those 900 s or 86400 s are used in the formula, respectively.
The Wavence automatically suppresses PM on 15 min granularity periods that are classified as "noSuspect" with no errors, and does not store them as history data. In such cases, some of the granularity periods may be missing.
Link availability counter is 0 in current data classes, for example Hop Current Statistics (15min/24h).
Net Bandwidth and Available Bandwidth are not applicable for UBT radio ports.

Where:

Net Bandwidth = radioPDHTTPBidNetBandwidth
Available Bandwidth = radioPDHTTPBidAvailableBandwidth
Capacity is:

- radioPDHTTPBidOperativeAvailableBandwidth - operative bandwidth in Mbps in case of radio LAG L1

- radioPDHTTPBidAvailableBandwidth - Net bandwidth in Mbps in case of 1+0 and 1+1 systems that are in FCM (Presetting)

- adaptiveMpdiulationCurrentCapacity - current bandwidth /1000 in Mbps in case of 1+0 and 1+1 systems that are in ACM (Adaptive Modulation)

Note: If the modulation is changed during polling period, it might lead to non-precise values for Link Utilization. As the Attribute Value Change (AVC) notification is not raised by the NE, it is required to consider “Current Capacity” at the end of the polling period.

Wavence-specific statistic usage information

The following provides notable statistic usage information that applies to Wavence devices:

When the ethAggrMaintTxTTO counter value is zero, no scheduled stats records are collected by NFM-P. This behavior is applicable only to scheduled statistics and not for on-demand statistics.
The values shown in the real-time plot of the TSL Hop Current Data statistic are multiplied by ten (so a value of 4.0 dBm is displayed as 40 dBm).
NFM-P supports elaborated counters as an extension to the following classes:
- AggrMaintTxStats (for radio, Ethernet user ports, and L1 radio LAG)
- AggrPerQueueMaintStats (for radio ports)
- AggrMaintRxStats (for Ethernet user ports)
The elaborated counters are applicable only to scheduled statistics and not on-demand statistics. NFM-P does not support real-time plotting of the elaborated counters. The elaborated counters are supported for Wavence SM, Wavence SA, and Wavence MSS-1c devices. See the Statistics Search Tool for detailed information about the individual statistics counters.
NFM-P supports the display of the compression gain elaborated counter in Ethernet ports and radio LAG ports. The compression gain counter shows the difference (%) in bandwidth when packet throughput booster is enabled.
The granularity period column displays the statistic collection period based on a set time interval; for example, 15 corresponds to 15 min and 24 corresponds to 24 hour.
NFM-P supports peak and average performance management statistics at LAG level for UBT-SA nodes, and when the radio ports are connected on the EASv2 or CAHD cards and are associated with LAG.

The radio interface performance management statistics are listed separately for collection intervals of 15 min and 24 hour at the port level. The following table lists the radio interface performance management statistics that are collected at the port level or using the Bulk Operations tool.

Radio interface PM statistic type	Usage notes
Adaptive Modulation Current Data	Statistic is only present when AM is enabled using Adaptive Modulation Mode.
Frame Hop Current Data	Always available for the Radio interface.
Frame Link Current Data	Available for the Radio interface when RPS is enabled. See Note 1 and Note 2.
RSL Hop Current Data	Always available for the Radio interface.
TSL Hop Current Data	Always available for the Radio interface.
RSL Link Current Data	See Note 1 and Note 2. When RPS is present, Hop stats are enabled/disabled on the protecting port along with the active port.
RSL Diversity Link Current Data	Available for Wavence Release 5.1 or later when the space diversity (combiner) is enabled on the Radio interface along with RPS.
RSL Diversity Hop Current Data	Available for Wavence Release 5.1 or later when the space diversity (combiner) is enabled on the Radio interface.
Peak and Average Current Data	See Note 3 Sstatistics are available for UBT Radio nodes only. Bulk operation is also supported for statistics collection.
Note 1: When RPS is present, you can enable/disable statistics on the protecting port along with the active port. Note 2: When RPS is present, do not edit the Radio PM statistic parameters from NFM-P GUI for the spare protecting port. Note 3: For UBT-T, Peak and Average statistics are supported only at the port level and not at the channel level. Note 4: For all Radio types, it is recommended to enable the ACM PM when the Radio is in Adaptive Modulation for the bandwidth calculation.

Note : Only UBT-C 1+0 supported statistics are supported for NFM-P Release 19.3 or later.

You can enable or disable performance management statistics at port level or using the Bulk Operations tool.
- Port level:
  
  You can enable or disable individual radio interface performance management statistics that are collected at intervals of 15 min or 24 hour. See To configure radio interface performance management statistics at the port level for more information.
- Bulk Operations tool:
  
  You can perform bulk changes to enable or disable the applicable incoming and outgoing performance management statistics for statistics collection intervals of 15 min and 24 hour for the radio, STM-1 SDH, E1, and DS1 interfaces. For the E1 interface, the Signal Mode must be configured as Framed before performing the modification. The changes are applicable to the entire list of allowable statistics for statistics collection intervals of 15 min and/or 24 hour. See To configure bulk changes for performance management statistics for more information; also see the “Bulk operations” chapter in the NSP NFM-P Classic Management User Guide for more information.
Perform the following to plot the statistics for both ends of a physical link traversing between two Wavence NEs, between a Wavence NE and a 7750 SR, or a Wavence NE and a 7705 SAR:
- Select a supported Radio link on the Administration→Physical Topology map, right-click on the link and choose Plotter→New Plot. The Statistics Plotter window opens to display both link endpoints in the Monitored Object column. Select the appropriate Statistics Group, Statistics Counter, or Data Format, and click the Record/Play buttons to plot the data.
- You can also plot Radio link statistics at the object level by selecting a supported device port in the navigation tree Equipment view, and choose Properties. The Physical Port — Port (Edit) form opens. Click Plotter→New Plot. The Statistics Plotter window opens to display the selected endpoint in the Monitored Object column. If the port is part of a Radio link, click on the Plot Other Endpoint(s) button to populate/view the other link endpoint. Select the appropriate Statistics Group, Statistics Counter, or Data Format parameters, and click the Record/Play buttons to plot the data.
See the NSP NFM-P Statistics Management Guide for more information about the statistics plotter.