Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Router QoS Input Policy to Perform DSCP-Based Drops Within AF4 Class

I have the need to create an Input policy on an ASR to drop DSCP traffic marked AF43 before AF42, Af42 before AF41 and AF41 before CS4 once when a certain bandwidth threshold is met; or simply to act on the drop probibility field for AF4 class. I want it on the input of the router since we're doing priority queuing on a modular QoS config on the output of the router. Since it's an input service-policy, I cannot do the bandwidth command on an input, so am looking for ideas on how to make the simpliest QoS config to: Drop all non-CS4 traffic in the AF4 class, once when 30 Mbps input rate is met.


Thanks for your input.



Super Bronze

DisclaimerThe Author of this


The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.


Hmm, I believe what you want to accomplish, with an ingress policy, isn't possible (as you're limited to policing).


If it were for egress, you would shape all the traffic for your 30 Mbps, and if you went over the shape rate, and hense started to queue packets, you could tier drop your different markings.

CreatePlease login to create content