Caclculate VoIP metrics using SAA/rttMon

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Apr 8th, 2008
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Hi,

Please can somebody help me with calculating the VoIP parameters jitter,delay,packet loss using rttMon MIB.It gives lots of OID's .But I am not clear enough to pick up which one.


Thanks in advance for the help


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andrew.butterworth Tue, 04/08/2008 - 02:59
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Hi, I downloaded a sample MRTG script ages ago and tested it on some Catalyst 3550's & 3560's using ip sla (saa). The OID's in the script were:


jitter .1.3.6.1.4.1.9.9.42.1.5.2.1.7.1&.1.3.6.1.4.1.9.9.42.1.5.2.1.17.1


RTT .1.3.6.1.4.1.9.9.42.1.5.2.1.2.1&.1.3.6.1.4.1.9.9.42.1.5.2.1.2.1 & .1.3.6.1.4.1.9.9.42.1.5.2.1.1.1&.1.3.6.1.4.1.9.9.42.1.5.2.1.1.1


Packet loss .1.3.6.1.4.1.9.9.42.1.5.2.1.26.1&.1.3.6.1.4.1.9.9.42.1.5.2.1.27.1


I apologise for my lack of SNMP knowledge in advance....


HTH


Andy

freebird123 Tue, 04/08/2008 - 03:38
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Hi,

Thanks for the information.Actually I am also new to this field of Network Management.I am drilling through the OIDs but not getting exactly what to pick up...I am picking up the oids from the rttMonLatestJitter table.

I tried the oids you mentioned.Only the thing is the end .1 which u specified for evry oid it shows no mib information when i query.help me on that to understand


Thanks for the help

andrew.butterworth Tue, 04/08/2008 - 03:44
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Hi, as I said apologies for my lack of SNMP knowledge. I can post the MRTG script I used however there isn't much more in it apart from the values to graph:


# SAA POS JITTER

Target[test-saa-posjitter]: .1.3.6.1.4.1.9.9.42.1.5.2.1.7.1&.1.3.6.1.4.1.9.9.42.1.5.2.1.17.1:[email protected]

Maxbytes[test-saa-posjitter]: 10000

Title[test-saa-posjitter]: SAA MAX Positive jitter

PageTop[test-saa-posjitter]:

SAA MAX Positive jitter

ShortLegend[test-saa-posjitter]: ms

YLegend[test-saa-posjitter]: miliseconds

Legend1[test-saa-posjitter]: MAX Positive jitter SD

Legend2[test-saa-posjitter]: MAX Positive jitter DS

LegendI[test-saa-posjitter]: SD:

LegendO[test-saa-posjitter]: DS:

Options[test-saa-posjitter]: growright, gauge, nopercent


# SAA NEG JITTER

Target[test-saa-negjitter]: .1.3.6.1.4.1.9.9.42.1.5.2.1.7.1&.1.3.6.1.4.1.9.9.42.1.5.2.1.17.1:[email protected]

Maxbytes[test-saa-negjitter]: 10000

Title[test-saa-negjitter]: SAA MAX Negative jitter

PageTop[test-saa-negjitter]:

SAA MAX Negative jitter

ShortLegend[test-saa-negjitter]: ms

YLegend[test-saa-negjitter]: miliseconds

Legend1[test-saa-negjitter]: MAX Negative jitter SD

Legend2[test-saa-negjitter]: MAX Negative jitter DS

LegendI[test-saa-negjitter]: SD:

LegendO[test-saa-negjitter]: DS:

Options[test-saa-negjitter]: growright, gauge, nopercent



# SAA RTT

Target[test-saa-rtt]: .1.3.6.1.4.1.9.9.42.1.5.2.1.2.1&.1.3.6.1.4.1.9.9.42.1.5.2.1.2.1:[email protected] / .1.3.6.1.4.1.9.9.42.1.5.2.1.1.1&.1.3.6.1.4.1.9.9.42.1.5.2.1.1.1:[email protected]

Maxbytes[test-saa-rtt]: 10000

Title[test-saa-rtt]: SAA RTT

PageTop[test-saa-rtt]:

SAA RTT

ShortLegend[test-saa-rtt]: ms

YLegend[test-saa-rtt]: miliseconds

Legend1[test-saa-rtt]: Latest RTT

Legend2[test-saa-rtt]: Latest RTT

LegendI[test-saa-rtt]: RTT:

LegendO[test-saa-rtt]: RTT:

Options[test-saa-rtt]: growright, gauge, nopercent


# SAA Packet loss

Target[test-saa-pktloss]: .1.3.6.1.4.1.9.9.42.1.5.2.1.26.1&.1.3.6.1.4.1.9.9.42.1.5.2.1.27.1:[email protected]

Maxbytes[test-saa-pktloss]: 10000

Title[test-saa-pktloss]: SAA Packet loss

PageTop[test-saa-pktloss]:

SAA Packet loss

ShortLegend[test-saa-pktloss]: pkts

YLegend[test-saa-pktloss]: Packets

Legend1[test-saa-pktloss]: Packet loss SD

Legend2[test-saa-pktloss]: Packet loss DS

LegendI[test-saa-pktloss]: SD:

LegendO[test-saa-pktloss]: DS:

Options[test-saa-pktloss]: growright, gauge


Hopefully someone with more a bit more of a clue than me will reply....


Andy

freebird123 Tue, 04/08/2008 - 03:48
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Thanks Sir,

That will help me to understand.I will get back to you if I find any difficulty.


Thanks again for help,

Shivani

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