Description

This article describes the issue of the Jitter Ingress and Jitter Egress values not being displayed with the SNMP OID.

Symptoms

  • Used RPM to obtain jitter ingress and jitter egress values.
  • Attempted to obtain these values via the SNMP OID.
  • When using show snmp mib wlak jnxMibs , jnxPingResultsJitterEgressUs is always 0 .

Solution


When viewing the Jitter results for the RPM probe, a different SNMP OID to poll to obtain these values is present.  To view the results, use the jnxRpmResSampleValue SNMP OID.

For example: 

root@rng# run show services rpm probe-results            
    Owner: rng, Test: rng-primary-link
    Target address: 10.6.220.198, Probe type: icmp-ping-timestamp,
    Test size: 5 probes
    Probe results:
      Response received, Wed Oct 17 09:19:09 2012,
      Client and server hardware timestamps
      Rtt: 16558 usec, Egress jitter: 98 usec, Ingress jitter: 788 usec,
      Round trip jitter: 886 usec, Egress interarrival jitter: 235 usec,
      Ingress interarrival jitter: 5336 usec,
      Round trip interarrival jitter: 5331 usec
    Results over current test:
      Probes sent: 4, Probes received: 4, Loss percentage: 0
      Measurement: Round trip time
        Samples: 4, Minimum: 15672 usec, Maximum: 33917 usec,
        Average: 20523 usec, Peak to peak: 18245 usec, Stddev: 7740 usec,
        Sum: 82091 usec
      Measurement: Positive egress jitter
        Samples: 2, Minimum: 98 usec, Maximum: 196 usec, Average: 147 usec,
        Peak to peak: 98 usec, Stddev: 49 usec, Sum: 294 usec
      Measurement: Negative egress jitter
        Samples: 2, Minimum: 89 usec, Maximum: 276 usec, Average: 183 usec,
        Peak to peak: 187 usec, Stddev: 94 usec, Sum: 365 usec
      Measurement: Positive ingress jitter

root@rng# run show snmp mib walk jnxRpmResSampleValue    
jnxRpmResSampleValue.3.114.110.103.16.114.110.103.45.112.114.105.109.97.114.121.45.108.105.110.107.1 = 16558 
jnxRpmResSampleValue.3.114.110.103.16.114.110.103.45.112.114.105.109.97.114.121.45.108.105.110.107.2 = 886 
jnxRpmResSampleValue.3.114.110.103.16.114.110.103.45.112.114.105.109.97.114.121.45.108.105.110.107.3 = 5331 
jnxRpmResSampleValue.3.114.110.103.16.114.110.103.45.112.114.105.109.97.114.121.45.108.105.110.107.5 = 98
jnxRpmResSampleValue.3.114.110.103.16.114.110.103.45.112.114.105.109.97.114.121.45.108.105.110.107.6 = 235
jnxRpmResSampleValue.3.114.110.103.16.114.110.103.45.112.114.105.109.97.114.121.45.108.105.110.107.8 = 788
jnxRpmResSampleValue.3.114.110.103.16.114.110.103.45.112.114.105.109.97.114.121.45.108.105.110.107.9 = 5336
The root of this tree is at .1.3.6.1.4.1.2636.3.50.1 or jnxRpmMib .