MQC Qos on Sup6-E (Cat4500), Change DSCP to tx-queue mapping?!

Answered Question
Sep 30th, 2010

With MQC is it possible to change the default DSCP to tx-queue mapping ?

if yes, how ?

With Sup6-E the command "qos maps dscp <xxx> to tx-queue <y>" does NOT exist.

thanks for the help.

Ps: which is the default tx-queue to dscp mapping with sup6-E ? Same as Sup V ?

I have this problem too.
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Correct Answer by Jason Masker about 6 years 2 months ago

The 6E uses MCQ based QoS. It supports up to 8 queues instead of the 4 queues supported by previous supervisors.  You identify the queues by creating a policy-map and applying it as an output service policy to a port.  See the configuration guide here:

http://www.cisco.com/en/US/customer/docs/switches/lan/catalyst4500/12.2/44sg/configuration/guide/qos.html#wp1531008

If you do not have a CCO you will need the PDF link. See the section specific to the 6-E.

http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/44sg/configuration/guide/qos.pdf

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Correct Answer
Jason Masker Thu, 09/30/2010 - 08:25

The 6E uses MCQ based QoS. It supports up to 8 queues instead of the 4 queues supported by previous supervisors.  You identify the queues by creating a policy-map and applying it as an output service policy to a port.  See the configuration guide here:

http://www.cisco.com/en/US/customer/docs/switches/lan/catalyst4500/12.2/44sg/configuration/guide/qos.html#wp1531008

If you do not have a CCO you will need the PDF link. See the section specific to the 6-E.

http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/44sg/configuration/guide/qos.pdf

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