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How to set unknown multicast suppression and check packets statistics

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Fault TypeOperation and maintenance >> Performance management >> Performance statistics problem
 Issue Description

We are having issues on the OLT with big packet loss for all our customers. Comes and goes. VOIP dies, etc<?xml:namespace prefix = "o" />


One of the things we need to try is to turn on broadcast (B.U.M.) suppression.


Is it possible to see statistics about per broadcast figures, and if broadcast thresholds have been breached?




 Solution


1.You can try the following command to check if MC_ING_MC_UNMC_CAR_DROP (unknown multicast ), MC_ING_MC_UUC_CAR_DROP (unknown unicast), or MC_ING_MC_BC_CAR_DROP (broadcast) is increasing:


(diagnose)%%display statistics ptype 0/slotid    //wait 5 second



(diagnose)%%display statistics ptype 0/slotid   //wait 5 second

(diagnose)%%display statistics ptype 0/slotid


2. As the unknown multicast suppression is not set (although broad multicast and unknown unicast suppression is set), you can also try to set it:



Format

ETH mode, MPU mode :

traffic-suppress { portid | all } { broadcast | multicast | unicast } value value

undo traffic-suppress { portid | all } { broadcast | multicast | unicast }

Global config mode:

traffic-suppress { frameid/slotid | all } { broadcast | multicast | unicast } value value

undo traffic-suppress { frameid/slotid | all } { broadcast | multicast | unicast }


such as:


(config)#traffic-suppress 0/1 multicast value 7

From group: Transport&Access Network

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