2013年6月12日星期三

mls qos aggr policer burst


Question:

Is there a way to police an Cisco 3560X  interface CIR to 1 megabit but be burstable up to 3 megs using MLS policer. From what I read the normal and max burst bytes must match and cisco uses a TC or .00025 however when I configure this I can have different normal and max burst but I can never get the desired effect of the CIR going up to the max burst no matter how high I set the max burst which leads me to believe its not possible and the policer is only taking the cir and normal burst into account.

I have successfully configured mls policer to offer the CIR I want but I can never seem to get bursts beyond the CIR to work, not sure if that is even possible with mls qos aggr.

Answer:

Mls aggregation is for multiple links to share the total aggregate BW value, meaning if the other links are idle then the active link will utilise the whole of the BW for it self.

However you are trying to police to a define value and  then burst over that value which isnt what policing does, To allow for bursting of traffic you would need to Catalyst 3560V2 shape.

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