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Beginner

LMS4.1 Problem with calculation of Interface Utilization

Dear All,

we have configured LMS to send emails when Interface Utilization is higher than 40% (default Threshold).

The mails look like this:

EVENT ID               = 00012QS

TIME                   = Wed 07-Nov-2012 03:03:54 CET

STATUS                 = Active

SEVERITY               = Critical

MANAGED OBJECT         = h-a45-c1.nlfb.bgr.de

MANAGED OBJECT TYPE     = Switches and Hubs

EVENT DESCRIPTION       = HighUtilization::Component=PORT-h-a45-c1.nlfb.bgr.de/8.7 [->cisco WS-C3560G-48TS] [H-F133-b311-C118-gi0/52];ComponentClass=Port;ComponentEventCode=1057;TrafficRate=5.0246484E7 BYPS;DuplexMode=FULLDUPLEX;UtilizationThreshold=40;MaxSpeed=1000000000;Ty

CUSTOMER IDENTIFICATION = notifivation_group_01

CUSTOMER REVISION       = 01

NOTIFICATION ORIGINATOR = Fault Management Module

But now I have a problem with the calculation of the TrafficRate:

TrafficRate=5.02464...E7 = 5.024 x 10 exp 7 = 50.240.000 bit/sec??? but 50Mbit/s are only 5% utilization on 1GBit Interface...

If someone can help with this calculation?

best regards

Werner

1 ACCEPTED SOLUTION

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Collaborator

there is one mistake in your calculation, on duplex interfaces the TrafficRate is the sum of ifInOctets and ifOutOctets (on half-duplex it is the max value). In both cases the value is given as octects, - to get bps you need to multiply with 8. To convert to Mbps you have to divide by 1000 000, thus you get

TrafficRate=5,0246484E7 (sum of ifInOctets and ifOutOctets)

in bps it is :

5.0246484 *10E7 *8 = 401971872

convert to Mbps:

401971872 / 1000 000 = 401,971872

all together:

5.0246484 *10E7 *8 /1000 000 = 401,971872

401 Mbps is 40,1% of 1Gbps (= 1000 Mbps)

thus, the event is correct.

View solution in original post

2 REPLIES 2
Highlighted
Collaborator

there is one mistake in your calculation, on duplex interfaces the TrafficRate is the sum of ifInOctets and ifOutOctets (on half-duplex it is the max value). In both cases the value is given as octects, - to get bps you need to multiply with 8. To convert to Mbps you have to divide by 1000 000, thus you get

TrafficRate=5,0246484E7 (sum of ifInOctets and ifOutOctets)

in bps it is :

5.0246484 *10E7 *8 = 401971872

convert to Mbps:

401971872 / 1000 000 = 401,971872

all together:

5.0246484 *10E7 *8 /1000 000 = 401,971872

401 Mbps is 40,1% of 1Gbps (= 1000 Mbps)

thus, the event is correct.

View solution in original post

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Thanks for your help, Martin!

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