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Class-map Pass All Traffic

Unanswered Question
Jul 2nd, 2013
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I new to QoS and want to create a class-map/policy-map to pass all traffic through an interface at 50%.   Not sure how to configure the class-map.  Here is what I have so far:


class-map match-all 1000mbps-class



policy-map 1000mbps-policy

class 1000mbps-class

  police 500000000 8000 exceed-action drop



interface Gi0/1

service-policy output 1000mbps-policy



Any help would be appreciated.

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Joseph W. Doherty Tue, 07/02/2013 - 08:04
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You're on the right track.

If you really want to match all traffic, just use class-default.  That way you don't need to define an explicit class.

BTW, some of the newer IOS's support percentages for the policer/shaper - a little easier to maintain.

Also, you might want to shape rather than police.

Eloy Pascal Tue, 07/02/2013 - 08:16
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You may want to use a shaper instead of a policer. The difference is that a policer will drop exceeding traffic while the shaper will not (it will shape the traffic to the BW you set).

Example (if using ISR router):

policy-map SHAPER

  class class-default

  shape average

      service-policy !! -> this is optional, in case you have a CBWFQ/LLQ policy, leave out if you don't

!! Apply to the interface, example using a P2P link

interface HSSIx/x/x (HDLC, POS etc.)

  service-policy output SHAPER

  hold-queue 4096 out

Hope this helps!


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