IP SLA Recurring

Answered Question
Mar 11th, 2010

Hi All,

I use an snmp tool to monitor IP SLA results. This works fine, but in testing this setup i noticed

that the Monitors i setup created a new collection index after the previous has completed. This happens

after 720 operations.

See config below

rtr 10
type echo protocol ipIcmpEcho 1.1.1.1 source-ipaddr 2.2.2.2
frequency 5
rtr schedule 10 life forever start-time now



ROUTER#sh rtr collection-statistics
Entry number: 10
Start Time Index: 19:08:19.628 GMT Thu Mar 11 2010
Number of successful operations: 720
Number of operations over threshold: 0
Number of failed operations due to a Disconnect: 0
Number of failed operations due to a Timeout: 0
Number of failed operations due to a Busy: 0
Number of failed operations due to a No Connection: 0
Number of failed operations due to an Internal Error: 0
Number of failed operations due to a Sequence Error: 0
Number of failed operations due to a Verify Error: 0
RTT Values:
RTTAvg: 2       RTTMin: 1       RTTMax: 216
NumOfRTT: 720   RTTSum: 1800    RTTSum2: 144548

Start Time Index: 20:08:19.628 GMT Thu Mar 11 2010
Number of successful operations: 201
Number of operations over threshold: 0
Number of failed operations due to a Disconnect: 0
Number of failed operations due to a Timeout: 0
Number of failed operations due to a Busy: 0
Number of failed operations due to a No Connection: 0
Number of failed operations due to an Internal Error: 0
Number of failed operations due to a Sequence Error: 0
Number of failed operations due to a Verify Error: 0
RTT Values:
RTTAvg: 4       RTTMin: 1       RTTMax: 216
NumOfRTT: 201   RTTSum: 845     RTTSum2: 93617

Can anyone explain this to me? Is it important, and after each consecutive 720 operations is a new index created??

TIA

Stephen

I have this problem too.
0 votes
Correct Answer by Sergei Vasilenko about 6 years 8 months ago

Hello Stephen,

By default the 2 backets of 1 hour stats are maintained for an IP SLAs operation.

In your case 720 x 5sec (freq) = 3600 sec.

You could also check this via CLI using "show ip sla monitor configuration ".

It could be changed however, please check the following:

Configuring and Scheduling an ICMP Echo Operation with Optional Parameters on the Source Device

http://www.cisco.com/en/US/partner/docs/ios/12_4/ip_sla/configuration/guide/hsicmp.html#wp1053262

Thanks,

Sergey

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Correct Answer
Sergei Vasilenko Tue, 03/16/2010 - 02:59

Hello Stephen,

By default the 2 backets of 1 hour stats are maintained for an IP SLAs operation.

In your case 720 x 5sec (freq) = 3600 sec.

You could also check this via CLI using "show ip sla monitor configuration ".

It could be changed however, please check the following:

Configuring and Scheduling an ICMP Echo Operation with Optional Parameters on the Source Device

http://www.cisco.com/en/US/partner/docs/ios/12_4/ip_sla/configuration/guide/hsicmp.html#wp1053262

Thanks,

Sergey

stephen.stack Fri, 03/19/2010 - 12:51

Hi Sergey

Thanks for replying. So it appears that there will always be two buckets, and when the second finishes a new one starts and the old deletes or purges. Thats perfect.

Thanks for your help


Stephen

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