Link Utilization Summary report

Link Utilization Summary report overview

The Link Utilization Summary report shows utilization percentage information for selected IGP interfaces.

The default display is a table showing ingress, egress and percentage utilization. By default the table is sorted by average egress utilization in decreasing value order (worst first).

Note: Selecting more than 6000 interfaces may affect performance. Nokia recommends selecting only necessary interfaces.

The donut chart segments are colored based on the interface average egress utilization percentages, as follows:

green: 0% to 20%
blue: 21% to 40%
purple: 41% to 60%
pink: 61% to 80%
red: 81% to 100%

Note: An operational CPAM with CPAA must be in use for the IGP Metric and Remote Node fields in the report to be populated.

Use cases

Capacity planning—Use the report to examine interface utilization patterns for planning future capacity requirements.

Limitations

Minimum and maximum throughput aggregation cannot be compared with the minimum and maximum throughput values generated from raw granularity.

Prerequisites

For a Link Utilization Summary report to be created for an interface, the following items must be performed:

Assign the interface to either an IS-IS or an OSPF context, that is, enable the interface for IP
If needed, assign the interface to an MPLS context, that is, also enable the interface for MPLS

The report shows utilization data for the statistics that are enabled. For example, if the interface is running both MPLS and IP but only IP statistics are enabled, the report shows IP utilization data only.

Note: The utilization data is derived from collected statistics. It will not be an exact match to utilization data available via CLI from the NE.

For an Interface Utilization Details report to be available as a drill-down, the MPLS LSP Egress Stats Aggregator must be enabled; see How do I configure analytics aggregation?. If the aggregator is not enabled, the Link Utilization Summary report can still be created, but the drill-down will not be available.

To avoid errors, Nokia recommends creating the report with 4 500 interfaces or less.

The following table describes the aggregation rules that must be enabled and the accounting policies that must be configured for the NEs on which statistics are to be collected; see the NSP NFM-P Statistics Management Guide for information about configuring an accounting policy. To view the report for granularities other than raw data, the aggregation rules must be enabled; see How do I configure analytics aggregation?.

Table 14-21: Link Utilization Summary report prerequisites

Aggregator name	Monitored object class	Statistics class	Statistics collection	MIB name	NE types
Ip Interface Stats Aggregator	rtr.NetworkInterface	rtr.IpInterfaceStats	Performance statistics	vRtrIfStatsEntry	7250 IXR 7705 SAR-H 7750-SR Note: 7210 SAS is not supported
Ip Interface Additional Stats Aggregator	rtr.NetworkInterface	rtr.IpInterfaceAdditionalStats	Performance statistics	vRtrIfStatsExtEntry	7250 IXR 7750-SR Notes: 7210 SAS is not supported 7705 SAR-H is not supported. The report logic considers Transmit Bytes from IP Interface Additional statistics and Receive Bytes (Rx Bytes) from SAR IP statistics. Therefore, the impact of the SAR-H NEs on the report is that Tx Bytes is zero and total traffic is equal to Rx Bytes.
SAR Ip Interface Stats Aggregator	rtr.NetworkInterface	rtr.SarIpInterfaceStats	Performance statistics	—	7705 SAR 7705 SAR-H 7705 SAR Hm Note: 7210 SAS is not supported
Mpls Interface Stats Aggregator	rtr.NetworkInterface	mpls.MplsInterfaceStats	Performance statistics	vRtrMplsIfStatEntry	7210 SAS 7250 IXR 7705 SAR 7705 SAR-H 7705 SAR Hm 7750 SR Omnisystem NE

Report characteristics

The following table lists the principal report characteristics.

Table 14-22: Link Utilization Summary report characteristics

Characteristic	Value
Data type	Statistics
Source database	Auxiliary database
Interface types supported	IP (IS-IS, OSPF, RIP), MPLS
Report inputs	Prompt	Notes
	End date	Calendar date or relative date (for example, two days ago) and time
	Granularity	Aggregation types: None (raw data) Hourly Daily Monthly
	Report Range	Length of time to be reported, in minutes (minutes, min), hours (hours, h), days (days, d), or months (months, m)
	NE Type	Search using partial names or wildcard (%). Select individual items or click Select All.
	NE Name (or NE Name Pattern)
	NEs
	Interface Name (or Interface Name Pattern)
	Interfaces
	Rank	Value to use for the Top-N LSPs in the Interface Details drill-down report. The maximum is 1000; default is 10. Will only be relevant when MPLS interfaces are present.
	Reference Speed	Interface Speed or Physical Port Speed Notes: IP-only utilization can be calculated with Interface Speed. MPLS-only and IP+MPLS calculations can only be calculated if the Reference Speed is Physical Port Speed.
	Logo Resource ID	The logo to add to the report. Enter the Resource ID of the logo image in the Images folder. The default is the Nokia logo. To create the report without a logo, leave the Logo Resource ID field blank.
	Logo Position	Choose Left, Middle, or Right. The logo appears on the left on the first page of the report if you choose Left or Middle.
	Show report output on one page	Select the check box to enable pagination. Note: Using the Show report output on one page option when creating reports as drill-downs may impact report rendering time. Nokia recommends disabling the Show report output on one page option when creating reports.
Drill-down support	Yes—Click on an interface name to open an Interface Utilization Details report for the selected interface.

Example

The following figure shows a report example.