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How does PI2.2 monitoring policy determine the broadcast percent?

jcockburn
Level 1
Level 1

Hi All,

We have set a custom monitoring policy to monitor the input broadcasts on the switches' interfaces. We have set it to trigger a critical alarm if it reaches 90%.

According to my understanding this means that if the broadcast traffic percentage on a specific interface (say 1Gbps) goes over 90% (which is then 900Mbps) then it will trigger an alarm. This is quite high and we see lots of these alarms...which was quite concerning. So upon further investigation we see that (using the normal show interface cmd) the total broadcast traffic for those interfaces never went above like 5% max...so I question the validity of those alarms...

So my question is how does Cisco Prime calculate that percentage. Is it maybe packets and not percentage???

 

Below a screenshot of the config...

I will also troubleshoot a bit further and update if I find something...but maybe some developer at Cisco Engineering is reading this and can find out for us ;-)

 

1 Reply 1

jcockburn
Level 1
Level 1

Hi All,

Seems there is a bug related to the calculation of the broadcast %.

I was advised to not use this functionality.

Also, it should be corrected by next release of PI...

Bug ID: CSCus01601

 

Ciao

JC

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