I have created a config on my access switches to mark traffic as it Cisco best practice.
What I am attempting to figure out is, My agg switches (4500X) are configured as L2 to the core. on my access switch I have a COS to DSCP mapping.
Given that the traffic should be marked as it egresses the access switch do I need to simply trust the COS value as it enters my agg switch? Then from the agg to the Core trust DSCP?
To further quantify my question, is there any further classifying that needs to occur between the agg and the core, or do I just trust the marking's as they leave the access switch, and the trust will set the ef values and so forth as the traffic traverses the network?
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