Using EOT to track the state of an IP SLA ICMPecho task

Answered Question
Apr 14th, 2010
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Hi,

I am stumped - I've come across some config on one of the UK's core routers for my customer.  EOT is configured with boolean expressions to track the response times of an icmpecho to 2 different destinations. If either of the tracked objects is down for longer than 12seconds than presumably something else will happen but what? Thats what I cannot get from this config. I've been through the EOT/IP SLA doc on Cisco website...been through the config with a fine toothcomb and still stumped.

There is no global track command apart from what is configured below, no hsrp configured on any interface, no static routes tagged with one of the object

id's below?  I've attached the routing part of the router config

What is missing or am I missing something?

The reason I ask is that Object-id 40 was flapping today but nothing happned!!


ip sla 10
icmp-echo 10.80.100.3 source-ip 10.201.64.218
frequency 10
ip sla schedule 10 life forever start-time now
ip sla 20
icmp-echo 10.80.100.4 source-ip 10.201.64.218
frequency 10
ip sla schedule 20 life forever start-time now
!
track 30 list boolean or
object 40
object 50
!
track 40 rtr 10
delay down 12
!
track 50 rtr 20
delay down 12


Thanks


Mary!

Correct Answer by Jon Marshall about 7 years 3 months ago

maryodriscoll wrote:


ip sla 10
icmp-echo 10.80.100.3 source-ip 10.201.64.218
frequency 10
ip sla schedule 10 life forever start-time now
ip sla 20
icmp-echo 10.80.100.4 source-ip 10.201.64.218
frequency 10
ip sla schedule 20 life forever start-time now
!
track 30 list boolean or
object 40
object 50
!
track 40 rtr 10
delay down 12
!
track 50 rtr 20
delay down 12




Mary


From the config you have posted nothing will happen because the tracking is not tied to anything. Perhaps this was config that was previously tracked to something but that was removed and the config was never cleaned up properly. But as you can see from what happened when object 40 flapped nothing actually happened on the router.


Jon

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Correct Answer
Jon Marshall Wed, 04/14/2010 - 10:05
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maryodriscoll wrote:


ip sla 10
icmp-echo 10.80.100.3 source-ip 10.201.64.218
frequency 10
ip sla schedule 10 life forever start-time now
ip sla 20
icmp-echo 10.80.100.4 source-ip 10.201.64.218
frequency 10
ip sla schedule 20 life forever start-time now
!
track 30 list boolean or
object 40
object 50
!
track 40 rtr 10
delay down 12
!
track 50 rtr 20
delay down 12




Mary


From the config you have posted nothing will happen because the tracking is not tied to anything. Perhaps this was config that was previously tracked to something but that was removed and the config was never cleaned up properly. But as you can see from what happened when object 40 flapped nothing actually happened on the router.


Jon

maryodriscoll Thu, 04/15/2010 - 10:57
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Jon

Would you believe that someone removed the tracked static routes....Thanks so much for getting back to me though

Regards


Mary

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