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IPSLA Data missing polls on certain tests

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Article ID: 213560

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Updated On:

Products

CA Performance Management - Usage and Administration

Issue/Introduction

IPSLA Data missing polls on certain tests on the same device other tests look good no missing data

Model: Cisco ASR 9006

Description: Cisco IOS XR Software (Cisco ASR9K Series), Version 6.4.2[Default] Copyright (c) 2020 by Cisco Systems, Inc.

 

Cause

When DCDebug turned on

Detailed Poll Logging by IP

You can check below points

Apr 08 10:42:34.978:  SnmpResponseVariable [oid=1.3.6.1.4.1.9.9.42.1.3.5.1.4.120, type=COUNTER, value=2400, isDelta=true, isList=true, error=SUCCESS, isDynamicIndex=true, indexList=null]

Apr 08 10:42:34.978:  SnmpResponseVariable [oid=1.3.6.1.4.1.9.9.42.1.3.5.1.5.120, type=COUNTER, value=16759, isDelta=true, isList=true, error=SUCCESS, isDynamicIndex=true, indexList=null]

Apr 08 10:47:34.976: SnmpResponseVariable [oid=1.3.6.1.4.1.9.9.42.1.3.5.1.4.120, type=COUNTER, value=2400, isDelta=true, isList=true, error=SUCCESS, isDynamicIndex=true, indexList=null]

Apr 08 10:47:34.976: SnmpResponseVariable [oid=1.3.6.1.4.1.9.9.42.1.3.5.1.5.120, type=COUNTER, value=16759, isDelta=true, isList=true, error=SUCCESS, isDynamicIndex=true, indexList=null]

Apr 08 10:47:34.955: CiscoIPSLADynamicDiscovery processed discovery: baseOID=1.3.6.1.4.1.9.9.42.1.3.5.1.4.120
 userObject=ItemBasedRequestState[responseReceivedTimestamp=1617875254955(Thu Apr 08 10:47:34 BST 2021), itemList=[14446387]] ,discoveryIntf=com.ca.im.d[email protected]77f2c46,
 discoveryResult=sysUpTime=2233207822, fullOID=1.3.6.1.4.1.9.9.42.1.3.5.1.4.120.2233225071, dynamicIndex=2233225071 ,discoveryState=CURRENT, currentDynamicIndex=2232865071

As you can see the sysUpTime read is 2233207822, and new bucketID is 2233225071 which is about 20000 timeticks in the future.

CAPM will not read the new bucket until current sysUpTime > bucketID (aka sysUpTime),

Data should not be written to it until the test is run after sysUpTime >= bucketID.

Hence CAPM read from the old bucket 2232865071 instead of 2233225071.

So the values that make up that metric are:
rttMonJitterStatsNumOfRTT > 0 ? (rttMonJitterStatsRTTSum/rttMonJitterStatsNumOfRTT)
rttMonJitterStatsNumOfRTT = 1.3.6.1.4.1.9.9.42.1.3.5.1.4.120.bucket = raw (2400) - prev 10:42 (2400) - delta (0)
rttMonJitterStatsRTTSum = 1.3.6.1.4.1.9.9.42.1.3.5.1.5.120.bucket = raw (16759) - prev 10:42 (16759) - delta (0)

Apr 08 10:47:34.976: Poll response after delta processing: SnmpPollResponse [itemID=14446387, deviceItemId=14446355, internetAddress=172.16.46.64, pollGroupId=5354712, cycleTimestamp=1617875100000

Apr 08 10:47:34.976:  SnmpResponseVariable [oid=1.3.6.1.4.1.9.9.42.1.3.5.1.4.120, type=COUNTER, value=0, isDelta=true, isList=true, error=SUCCESS, isDynamicIndex=true, indexList=null]

Apr 08 10:47:34.976:  SnmpResponseVariable [oid=1.3.6.1.4.1.9.9.42.1.3.5.1.5.120, type=COUNTER, value=0, isDelta=true, isList=true, error=SUCCESS, isDynamicIndex=true, indexList=null]

So we return NULL.

poll data returned, we see:
Apr 08 10:47:34.980:  DCMResponseVariable [name={http://im.ca.com/normalizer}NormalizedJitterInfo.AvgResponseTime, value=NULL ]

Environment

Release : 20.2

Component : IM Reporting / Admin / Configuration

Resolution

Cisco confirmed as a bug 

Details of the bug:

Cisco Bug: CSCvn30103 - ipsla statistics report wrong Latest and Next operation start times.

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