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New Member

4500 Sup6E QoS

IS there any way to see the queues/cos mapping etc on the Sup6E

eg the old commands were "show qos map". Is there any way to configure and show what DSCP's go to certain queues?

New Member

Re: 4500 Sup6E QoS


There is not a default mapping like the "old".

In Sup6E the Qos has changed to MQC, like routers. The default behavior is to trust the qos recived and only a default queue.

From the maunal....

By default, in Supervisor Engine 6-E, without any service policies associated with a port, there are two queues (a control packet queue and a default queue) with no guarantee as to the bandwidth or kind of prioritization. The only exception is that system generated control packets are euqueued into control packet queue so that control traffic receives some minimum link bandwidth.

The MQC model does not support the trust feature, which is available in the switch qos model on Supervisor Engines II-Plus through V-10GE. In the MQC model supported on the

Supervisor Engine 6-E, the incoming traffic is considered trusted by default. Only when the

trusted boundary feature is enabled on an interface can the port enter untrusted mode. In this mode, the switch marks the DSCP value of an IP packet and the CoS value of the VLAN tag on the Ethernet frame as "0".

Se the manual for futher information.


New Member

Re: 4500 Sup6E QoS


yes there is a way ==> MQC. If you apply auto qos then you'll see the Q mappings and the remarking actions. Looks like that:

class-map match-all Skinny-QosGroup24

match qos-group 24

class-map match-all VoIP-QosGroup46

match qos-group 46

class-map match-all Skinny-Dscp26

match dscp af31

class-map match-all VoIP-Dscp46

match dscp ef

class-map match-all Sinny-Dscp24

match dscp cs3

class-map match-all VoIP-Cos5

match cos 5

class-map match-all Skinny-Cos3

match cos 3



policy-map in_Trust_COS

class VoIP-Cos5

set qos-group 46

class Skinny-Cos3

set qos-group 24

policy-map in_NO_Trust

class class-default

set dscp default

set cos 0

policy-map in_Trust_DSCP

class VoIP-Dscp46

set qos-group 46

class Skinny-Dscp26

set qos-group 24

class Sinny-Dscp24

set qos-group 24

policy-map out_QOS

class Skinny-QosGroup24

set dscp cs3

set cos 3

class VoIP-QosGroup46


set dscp ef

set cos 5

class class-default


set cos 0

set dscp default

==> you can also configure trust state of ports..

hope this helps