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    Measuring Health

    You can monitor health metrics reactively by using fault management software such as SMARTS InCharge, Micromuse Netcool Omnibus, or Concord Live Exceptions. We recommend that you monitor the health metrics shown in Table 1.

    Table 1: Health Metrics

    Metric:

    Errors in

    Description

    Number of inbound packets that contained errors, preventing them from being delivered

    MIB name

    IF-MIB (RFC 2233)

    Variable name

    ifInErrors

    Variable OID

    .1.3.6.1.31.2.2.1.14

    Frequency (mins)

    60

    Allowable range

    To be baselined

    Managed objects

    Logical interfaces

    Metric:

    Errors out

    Description

    Number of outbound packets that contained errors, preventing them from being transmitted

    MIB name

    IF-MIB (RFC 2233)

    Variable name

    ifOutErrors

    Variable OID

    .1.3.6.1.31.2.2.1.20

    Frequency (mins)

    60

    Allowable range

    To be baselined

    Managed objects

    Logical interfaces

    Metric:

    Discards in

    Description

    Number of inbound packets discarded, even though no errors were detected

    MIB name

    IF-MIB (RFC 2233)

    Variable name

    ifInDiscards

    Variable OID

    .1.3.6.1.31.2.2.1.13

    Frequency (mins)

    60

    Allowable range

    To be baselined

    Managed objects

    Logical interfaces

    Metric:

    Unknown protocols

    Description

    Number of inbound packets discarded because they were of an unknown protocol

    MIB name

    IF-MIB (RFC 2233)

    Variable name

    ifInUnknownProtos

    Variable OID

    .1.3.6.1.31.2.2.1.15

    Frequency (mins)

    60

    Allowable range

    To be baselined

    Managed objects

    Logical interfaces

    Metric:

    Interface operating status

    Description

    Operational status of an interface

    MIB name

    IF-MIB (RFC 2233)

    Variable name

    ifOperStatus

    Variable OID

    .1.3.6.1.31.2.2.1.8

    Frequency (mins)

    15

    Allowable range

    1 (up)

    Managed objects

    Logical interfaces

    Metric:

    Label Switched Path (LSP) state

    Description

    Operational state of an MPLS label-switched path

    MIB name

    MPLS-MIB

    Variable name

    mplsLspState

    Variable OID

    mplsLspEntry.2

    Frequency (mins)

    60

    Allowable range

    2 (up)

    Managed objects

    All label-switched paths in the network

    Metric:

    Component operating status

    Description

    Operational status of a router hardware component

    MIB name

    JUNIPER-MIB

    Variable name

    jnxOperatingState

    Variable OID

    .1.3.6.1.4.1.2636.1.13.1.6

    Frequency (mins)

    60

    Allowable range

    2 (running) or 3 (ready)

    Managed objects

    All components in each Juniper Networks router

    Metric:

    Component operating temperature

    Description

    Operational temperature of a hardware component, in Celsius

    MIB name

    JUNIPER-MIB

    Variable name

    jnxOperatingTemp

    Variable OID

    .1.3.6.1.4.1.2636.1.13.1.7

    Frequency (mins)

    60

    Allowable range

    To be baselined

    Managed objects

    All components in a chassis

    Metric:

    System up time

    Description

    Time, in milliseconds, that the system has been operational.

    MIB name

    MIB-2 (RFC 1213)

    Variable name

    sysUpTime

    Variable OID

    .1.3.6.1.1.3

    Frequency (mins)

    60

    Allowable range

    Increasing only (decrement indicates a restart)

    Managed objects

    All routers

    Metric:

    No IP route errors

    Description

    Number of packets that could not be delivered because there was no IP route to their destination.

    MIB name

    MIB-2 (RFC 1213)

    Variable name

    ipOutNoRoutes

    Variable OID

    ip.12

    Frequency (mins)

    60

    Allowable range

    To be baselined

    Managed objects

    Each router

    Metric:

    Wrong SNMP community names

    Description

    Number of incorrect SNMP community names received

    MIB name

    MIB-2 (RFC 1213)

    Variable name

    snmpInBadCommunityNames

    Variable OID

    snmp.4

    Frequency (hours)

    24

    Allowable range

    To be baselined

    Managed objects

    Each router

    Metric:

    SNMP community violations

    Description

    Number of valid SNMP communities used to attempt invalid operations (for example, attempting to perform SNMP Set requests)

    MIB name

    MIB-2 (RFC 1213)

    Variable name

    snmpInBadCommunityUses

    Variable OID

    snmp.5

    Frequency (hours)

    24

    Allowable range

    To be baselined

    Managed objects

    Each router

    Metric:

    Redundancy switchover

    Description

    Total number of redundancy switchovers reported by this entity

    MIB name

    JUNIPER-MIB

    Variable name

    jnxRedundancySwitchoverCount

    Variable OID

    jnxRedundancyEntry.8

    Frequency (mins)

    60

    Allowable range

    To be baselined

    Managed objects

    All Juniper Networks routers with redundant Routing Engines

    Metric:

    FRU state

    Description

    Operational status of each field-replaceable unit (FRU)

    MIB name

    JUNIPER-MIB

    Variable name

    jnxFruState

    Variable OID

    jnxFruEntry.8

    Frequency (mins)

    15

    Allowable range

    2 through 6 for ready/online states. See jnxFruOfflineReason in the event of a FRU failure.

    Managed objects

    All FRUs in all Juniper Networks routers.

    Metric:

    Rate of tail-dropped packets

    Description

    Rate of tail-dropped packets per output queue, per forwarding class, per interface.

    MIB name

    JUNIPER-COS-MIB

    Variable name

    jnxCosIfqTailDropPktRate

    Variable OID

    jnxCosIfqStatsEntry.12

    Frequency (mins)

    60

    Allowable range

    To be baselined

    Managed objects

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

    Metric:

    Interface utilization: octets received

    Description

    Total number of octets received on the interface, including framing characters.

    MIB name

    IF-MIB

    Variable name

    ifInOctets

    Variable OID

    .1.3.6.1.2.1.2.2.1.10.x

    Frequency (mins)

    60

    Allowable range

    To be baselined

    Managed objects

    All operational interfaces in the network

    Metric:

    Interface utilization: octets transmitted

    Description

    Total number of octets transmitted out of the interface, including framing characters.

    MIB name

    IF-MIB

    Variable name

    ifOutOctets

    Variable OID

    .1.3.6.1.2.1.2.2.1.16.x

    Frequency (mins)

    60

    Allowable range

    To be baselined

    Managed objects

    All operational interfaces in the network

    Note: Byte counts vary depending on interface type, encapsulation used and PIC supported. For example, with vlan-ccc encapsulation on a 4xFE, GE, or GE 1Q PIC, the byte count includes framing and control word overhead. (See Table 2.)

    Table 2: Counter Values for vlan-ccc Encapsulation

    PIC Type

    Encapsulation

    input (Unit Level)

    Output (Unit Level)

    SNMP

    4xFE

    vlan-ccc

    Frame (no frame check sequence [FCS])

    Frame (including FCS and control word)

    ifInOctets, ifOutOctets

    GE

    vlan-ccc

    Frame (no FCS)

    Frame (including FCS and control word)

    ifInOctets, ifOutOctets

    GE IQ

    vlan-ccc

    Frame (no FCS)

    Frame (including FCS and control word)

    ifInOctets, ifOutOctets

    SNMP traps are also a good mechanism to use for health management. For more information, see “Standard SNMP Traps Supported by Junos OS” and “Enterprise-Specific SNMP Traps Supported by Junos OS.”

    Modified: 2017-06-14