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Measuring Performance

The performance of a service provider’s network is usually defined as how well it can support services, and is measured with metrics such as delay and utilization. We suggest that you monitor the following performance metrics using applications such as InfoVista Service Performance Management or Concord Network Health (see Table 30).

Table 30: Performance Metrics

Metric:

Average delay

Description

Average round-trip time (in milliseconds) between two measurement points.

MIB name

DISMAN-PING-MIB (RFC 2925)

Variable name

pingResultsAverageRtt

Variable OID

pingResultsEntry.6

Frequency (mins)

15 (or depending upon ping test frequency)

Allowable range

To be baselined

Managed objects

Each measured path in the network

Metric:

Interface utilization

Description

Utilization percentage of a logical connection.

MIB name

IF-MIB

Variable name

(ifInOctets & ifOutOctets) * 8 / ifSpeed

Variable OID

ifTable entries

Frequency (mins)

60

Allowable range

To be baselined

Managed objects

All operational interfaces in the network

Metric:

Disk utilization

Description

Utilization of disk space within the Juniper Networks router

MIB name

HOST-RESOURCES-MIB (RFC 2790)

Variable name

hrStorageSizehrStorageUsed

Variable OID

hrStorageEntry.5 – hrStorageEntry.6

Frequency (mins)

1440

Allowable range

To be baselined

Managed objects

All Routing Engine hard disks

Metric:

Memory utilization

Description

Utilization of memory on the Routing Engine and FPC.

MIB name

JUNIPER-MIB (Juniper Networks enterprise Chassis MIB)

Variable name

jnxOperatingHeap

Variable OID

Table for each component

Frequency (mins)

60

Allowable range

To be baselined

Managed objects

All Juniper Networks routers

Metric:

CPU load

Description

Average utilization over the past minute of a CPU.

MIB name

JUNIPER-MIB (Juniper Networks enterprise Chassis MIB)

Variable name

jnxOperatingCPU

Variable OID

Table for each component

Frequency (mins)

60

Allowable range

To be baselined

Managed objects

All Juniper Networks routers

Metric:

LSP utilization

Description

Utilization of the MPLS label-switched path.

MIB name

MPLS-MIB

Variable name

mplsPathBandwidth / (mplsLspOctets * 8)

Variable OID

mplsLspEntry.21 and mplsLspEntry.3

Frequency (mins)

60

Allowable range

To be baselined

Managed objects

All label-switched paths in the network

Metric:

Output queue size

Description

Size, in packets, of each output queue per forwarding class, per interface.

MIB name

JUNIPER-COS-MIB

Variable name

jnxCosIfqQedPkts

Variable OID

jnxCosIfqStatsEntry.3

Frequency (mins)

60

Allowable range

To be baselined

Managed objects

For each forwarding class per interface in the network, once CoS is enabled.

This section includes the following topics:


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