Suspended QoS State on ASR1000

[Vinit Jain]

Topology:

Port-Channel is configured between two ASR1k routers. There are multiple sub-interfaces on the port-channel with various inbound and outbound service-policies.

Figure 1 shows the topology:

Platform: ASR1002-X

Software: asr1002x-universalk9.03.07.03.S.152-4.S3.SPA.bin

Problem Description:

QoS policy on port-channel sub-interfaces shows in suspended state. Neither the inbound nor outbound policies are working.

- The QoS policy on other physical interfaces are working fine without any problem but only the policy-map on port-channel sub-interfaces are in suspended state

Logs Showing Problem

R2#sh run int po2.110
!
interface Port-channel2.110
 encapsulation dot1Q 110
 ip address 10.222.2.117 255.255.255.252
 service-policy input Test-In
 service-policy output Test-Out
end
R2#
R2#show policy-map int po2.110
 Port-channel2.110 

  Service-policy input: Test-In

    Service policy Test-In is in suspended mode

  Service-policy output: Test-Out

    Service policy Test-Out is in suspended mode

Root Cause

The problem is seen because the default load-balancing mode on ASR1k router is set to flow-based but in order for Egress or Ingress policy on port-channel sub-interface, the load-balancing mode has to be vlan-manual.

This can be done by configuring port-channel load-balancing vlan-manual in global configuration mode or load-balancing vlan under port-channel interface configuration mode. This will remove the QoS policies from suspended state and get it working.

Working Example

R2(config)#int port-channel 2
R2(config-if)#load-balancing vlan
R2(config-if)#end

R2#show policy-map int po2.110
 Port-channel2.110 

  Service-policy input: Test-In

    Class-map: class-default (match-any)  
      0 packets, 0 bytes
      30 second offered rate 0000 bps, drop rate 0000 bps
      Match: any 
      police:
          cir 64000 bps, bc 12000 bytes, be 12000 bytes
        conformed 0 packets, 0 bytes; actions:
          set-mpls-exp-imposition-transmit 3
        exceeded 0 packets, 0 bytes; actions:
          drop 
        violated 0 packets, 0 bytes; actions:
          drop 
        conformed 0000 bps, exceeded 0000 bps, violated 0000 bps

  Service-policy output: Test-Out

    Class-map: class-default (match-any)  
      0 packets, 0 bytes

Reference

CCO Documentation:

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_mqc/configuration/xe-3s/qos-mqc-xe-3s-book/qos-eth-int.html#GUID-3765023E-88D9-4C00-BF05-55C2BD19C490

[ndemers]

4451-X ROUTER

I still am seeing suspended mode with both configs applied

RUSREDRWAC4401#show run | i load
port-channel load-balancing vlan-manual

interface Port-channel1
no ip address
no negotiation auto
load-balancing vlan
end

RUSREDRWAC4401#

Class Map match-all CM_POS (id 20)
Match any

Policy Map PM_POS
Class CM_POS
set dscp ef

interface Port-channel1.102
description POS_Infra_4401
encapsulation dot1Q 102
ip address 10.10.102.1 255.255.255.252
ip nat inside
zone-member security POS
ip ospf network point-to-point
service-policy input PM_POS
end

RUSREDRWAC4401#show policy-map interface port1.102
Port-channel1.102

Service-policy input: PM_POS

Service policy PM_POS is in suspended mode
RUSREDRWAC4401#

[mohisla2]

Another Solution for the Suspended QOS with Port-Channel with Sub-interfaces without using the "load-balancing vlan".

you can use the Aggregate GEC QOS (which will provide Flow based Etherchannel QOS), Below is a sample Configurations:

platform qos port-channel-aggregate 1  ==> issue this command before creating Port-Channel 1

Then create the Port-channel "1" & apply the QOS under Port-channel Sub-interface..

The "Aggregate GEC QOS" Feature is supported from in XE 3.16.3 & later..

Hope this could help,

Islam

[kasunrbn]

Does this cause traffic to NOT LOAD BALANCE between the Ether Channel members? 
I recently made this change from FLOW to VLAN based and it stopped splitting traffic between the 2 links and just started taking ALL the traffic on 1 of the ether channel members. 

Any idea ?