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6500 QoS COS Egress Not Marked

Problem: My traffic coming inbound appears to be marked but is not marked when egressing.


Setup:

  • Ingress from encoder G3/9->> Egress G8/1
  • Default DSCP/COS map table (DSCP 24 is COS3)

   Cos-dscp map:

         cos:   0  1  2  3  4  5  6  7

     ------------------------------------

        dscp:   0  8 16 24 32 40 48 56


1. Any reason COS 3 is not marked outbound on this traffic? I'm determining this by doing a wireshark off of interface g8/1. The traffic appears to be marked on the ingress correctly but does not maintain its mark on the egress. I can confirm this with equipment on other Ethernet links in produciton as well as my test port listed in the config below with wireshark.

FYI: Unfortunately with my cards in the 6509 I cannot port mirror and see outbound multicast (determined through a TAC case). Because the STB does not understand tagged traffic I setup the native vlan for it to function. To see the multicast with tags I temporarily remove the native command and do the wireshark to see the multicast. It still shows a COS setting of 0. I will try to attach a capture of a multicast packet.

interface GigabitEthernet3/9

description Mulicast Encoder

switchport

switchport access vlan 962

switchport mode access

logging event link-status

load-interval 30

service-policy input MARK_IP_PREC_3

!

PhatCat#sho policy-map int g3/9

GigabitEthernet3/9

Service-policy input: MARK_IP_PREC_3


    class-map: ALL_TRAFFIC (match-all)

      Match: access-group 47

      set dscp 24:

      Earl in slot 6 :

3268388676 bytes

30 second offered rate 4074264 bps

aggregate-forwarded 3268388676 bytes


    Class-map: class-default (match-any)

      0 packets, 0 bytes

      30 second offered rate 0000 bps, drop rate 0000 bps

      Match: any

        0 packets, 0 bytes

        30 second rate 0 bps

2. I've continued to try and mark on the egress but have problems with the configuration. I'm ingressing on g3/9 and egressing on 8/1 for my test.

Egress Attempt 1:

PhatCat(config)#int g8/1

PhatCat(config-if)#service-policy output MARK_OUTBOUND_VIDEO

MQC features are not supported in output direction for this interface

Egress Attempt 2:

PhatCat(config)#int vlan 781

PhatCat(config-if)#service-policy output MARK_OUTBOUND_VIDEO

set cos cannot be configured on output direction for this interface

Configuration failed!

%'set cos cos-inner' for 'class OUT_VIDEO' on Vlan781 is not supported

('set cos cos-inner' is only supported on a class with 'match vlan' or on 'class class-default')


Configuration:

interface GigabitEthernet8/1

description STB-NET8-TEST

switchport

switchport access vlan 781

switchport trunk encapsulation dot1q

switchport trunk native vlan 781

switchport trunk allowed vlan 781

switchport mode trunk

logging event link-status

load-interval 30

no cdp enable

end

interface Vlan781

description NET8

ip address 10.239.56.1 255.255.248.0

ip helper-address 10.100.141.40

ip pim dense-mode

end


Everyone's tags (6)
2 REPLIES 2

6500 QoS COS Egress Not Marked

Try this

no mls qos rewrite ip dscp


6500 QoS COS Egress Not Marked

Hi,

Check the class-map OUT_VIDEO that has unsupported action. remove and reapply policy and it should accept it.

set cos cannot be configured on output direction for this interface

Configuration failed!

%'set cos cos-inner' for 'class OUT_VIDEO' on Vlan781 is not supported

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