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XR QoS - Possible to Guarantee Traffic on Ingress?

ODJ
Level 1
Level 1

Hej

I am working on a QoS profile for MPLS Customers. where I limit overall port traffic with a Parent policy, then use Child policy to limit some of the DSCP values on ingress.

For example: I limit Overall interface ingress BW to 100Mbps, and limit EF traffic to only 10% of that.

My issue is that I can not figure out how to guarantee the 10% EF traffic on ingress.

I see that if for example I send 1G BE traffic, I only see maybe 1% EF traffic or even less being passed. So there doesn't seem to be a filtering or buffering mechanism on ingress. Or none that I could find.

I would appreciate the help. Below is the config

 

###########PARENT POLICY###########
policy-map INGRESS-PARENT-100M
 class class-default
  service-policy INGRESS-CHILD
  police rate 100 mbps 
  ! 
 ! 
 end-policy-map
! 
###########CHILD POLICY###########
policy-map PM-ACCESS-IN-CHILD
 description STANDARD QoS child for CPE access with QoS 
 class CM-ACCESS-IN-EF
  set traffic-class 5
  set mpls experimental imposition 5
  police rate percent 10 
  ! 
 !
 class class-default
  set traffic-class 1
  set mpls experimental imposition 1
 ! 
 end-policy-map
! 

################CLASS-MAP############
class-map match-any CM-ACCESS-IN-EF
 match dscp ef 
 end-class-map
! 


Regards

 

3 Replies 3

ntikader
Cisco Employee
Cisco Employee

Hi Odj , 

 

Please suggest the plaftorm you want to apply this config , as QOS is H.W specefic   in all XR platforms and there can be limiation on specefic platfoms.  

Hej ntikader

We are using NCS55A2 version 7.2.2

ntikader
Cisco Employee
Cisco Employee

Hi Odj , 

 

Regarding the QoS config  suggested is either incomplete or wrong config . 

 

Also when using Parent Child polices it means you want to use  hierarchical qos policy  .

To enable HQoS on NCS5500 you need the  below global configuration command

hw-module profile qos hqos-enable”  ------ thsi require router reload 

 

 

policy-map INGRESS-PARENT-100M
 class class-default 
  service-policy INGRESS-CHILD where is this policy configured .
  police rate 100 mbps 
  ! 
 ! 
 end-policy-map

 Please check the below cco link for Do and Dont during QOS config in NCS platforms. 

 

https://www.cisco.com/c/en/us/td/docs/iosxr/ncs5500/qos/70x/b-qos-cg-ncs5500-70x/b-qos-cg-ncs5500-70x_chapter_010.html#concept_B2623387F5114390BC8E06D0E2119D76