QOS 4506 tx-queue 3

[Wermy]

QOS priority help

How can I map dscp 38 to tx-queue 3

I can do the following:

qos map dscp 38 to tx-queue 3

but not

qos map dscp 38 to tx-queue 4

[Sergei Vasilenko]

Hello,

The reason could be due to the fact 
that dscp mapping you are trying to 
configured are already pre-configured by default.
So only the non-standard/non-default configurations will shows up 
in the configuration.  

The statements which change the default mapping will be show in config, 
while the others (default) do not.  
You can check this via CLI command:

"show qos map dscp tx-queue"

For example: 
-----
! DCHP int the output is the combination of d1d2
So from the table it could be see that due to the change 
the dscp38 now gets mapped into tx-queue 4:

#show qos map dscp tx-queue
DSCP-TxQueue Mapping Table (dscp = d1d2)
d1 : d2  0  1  2  3  4  5  6  7  8  9 
-------------------------------------
 0 :    01 01 01 01 01 01 01 01 01 01 
 1 :    01 01 01 01 01 01 02 02 02 02 
 2 :    02 02 02 02 02 02 02 02 02 02 
 3 :    02 02 03 03 03 03 03 03 04 03  
 4 :    03 03 03 03 03 03 03 03 04 04 
 5 :    04 04 04 04 04 04 04 04 04 04 
 6 :    04 04 04 04 

#sh running-config | inc qos
qos map dscp 38 to tx-queue 4

-----

Thanks,

Sergey