auto qos... commands are just fancy macros really.
As you have suggested, the important command in this case is 'mls qos trust dscp'.
However - applying the auto qos command also generates any global configuration (i.e. queue mappings, cos-dscp/dscp-cos maps etc) and any scheduling settings that are required. So if you have a server switch on which you haven't configured any qos yet, it will set up settings consistent with your edge switches where you have applied auto qos.
If you have other ports set up for auto qos on this switch you could just apply 'mls qos trust dscp'... however it's safer (and looks nicer/easier to read) if you apply the auto qos then the trust dscp commands.
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The short answer is that you don't.... That isn't entirely true while at
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Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
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