Catalyst 3750 MLS to Catalyst 3850 MQC

[Bruce Wilson]

Have a Catalyst 3750 Switch Core Stack and moving off of them to a new Catalyst 3850 Switch Core Stack.

However, the new Catalyst 3850 Switch Stack does not support MLS, only MQC.

How do i convert the existing MLS config to the new MQC config?

Also, all the access switches connected have mls qos trust on switch ports, what would happen then?

[Francesco Molino · Accepted solution]

Hi

The config conversion should be fine manually. There's no way to do it automatically except if you develop your own script. 

Here's a link that could help you:

http://www.cisco.com/c/en/us/support/docs/switches/catalyst-3850-series-switches/118629-technote-qos-00.html

Having mls qos trust on your switchport, will just trust the dscp or cos based on your config. I guess you're trusting the dscp value. The traffic will passthrough the right class-map based on the traffic dscp. 

Hope that answers your question. 

Thanks 

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