I'm in the process of configuring QOS on a 3560 routing switch in a GOLD, SILVER, BRONZE priority type scenario.
Firstly, I understand that this config will add a tag of "precedence 5" to a packet if it matches the "ACL_QOS_GOLD_In" access list. Question is does the router see this "precedence 5" tag and then sets the priority, or am I missing something in my config where at present it just sees the "precedence 5" and doesn’t act on it ?
Secondly, Since the "precedence 5" tag has already been added to the packets, do downstream routers see this tag and act accordingly or so I need to configure those is well ?
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Whether your 3560 will act on your IPPrec 5 setting depends on its configuration. "mls qos", alone, enables a default egress configuration, although don't recall what it uses, by default, for egress classification.
Regarding downstream devices, whether IPPrec 5 will be treated differently depends on those device configurations (and capabilities). Often the default is no special treatment.
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