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New Member

QoS : help needed

Hello I am configuring a QoS between a point to point link and am seeing some anomalies. I am not sure if I am doing something wrong so would be grateful to have some insights on this please

A end

interface GigabitEthernet0/1
 description ### Link ###
 no ip address
 load-interval 30
 duplex auto
 speed auto
 service-policy output QOS_OUT


!
interface GigabitEthernet0/1.307
 description Link
 encapsulation dot1Q 307
 ip vrf forwarding Data
 ip address xxx.xxx.xxx.xxx 255.255.255.254
 rate-limit output 640000 640000 640000 conform-action transmit exceed-action drop
 ip tcp adjust-mss 1448
!

policy-map QOS_OUT
 class TRAFFIC_High
  bandwidth 200
 class RWE TRAFFIC_Normal
  bandwidth 200
  police 400000


B end

This end is a common outbound so only option is applying the config on the sub-interface which has been
done as follows (as CBWFQ not allowed on sub-interfaces

interface GigabitEthernet0/1.307
 description Link
 encapsulation dot1Q 307
 ip vrf forwarding Data
 ip address xxx.xxx.xxx.xxx 255.255.255.254
 ip tcp adjust-mss 1448
 service-policy output QOS_OUT
end


policy-map QOS_OUT
 class TRAFFIC_High
  shape average 640000
 class TRAFFIC_Normal
  shape average 200000
  police 400000


ACLs are same on both ends

But when i do a show policy map at the same time

traffic under high at end A is 113000 bps and under normal at end A is 53000
traffic under high at end B is 38000 bps and under normal at end B is 149000

Is there something i am doing wrong that is causing this anomaly?

any advice will be much appreciated.


Many Thanks

3 REPLIES
Cisco Employee

Hi, I have few queries  1.

Hi,

 

I have few queries 

 

1. The traffic rate you have mentioned at point A and B, are these outbound traffic bothsides. Outbound traffic at point A would be inbound traffic at point B.

2. What is end purpose from both side QOS policies. I see in same class you have done shaping and policing both (B end). What is total link bandwidth and how much bandwidth you want to allocate to each class.

 

Regards,

Akash

New Member

Thanks for your reply. with

Thanks for your reply.

 

with regards to your points :

 

A) Yes these are outbound at both ends.

 

B) For both side QoS policies I have done shaping and policing as I needed a min of 200K and to cap the traffic at 400K. I should have used bandwidth command on it?
 

New Member

Hi Akash  I saw your QoS

Hi Akash 

 

I saw your QoS presentation but was looking for assistance in regards to qos on the 3850 which uses the MQC. I posted my question on the below link and was wondering if you had any pointers or input on this config?

https://supportforums.cisco.com/discussion/12498176/3850-qos-config-pcoip

 

Thanks 

Jeff

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