http://www.cisco.com/en/US/partner/docs/solutions/Enterprise/Video/tpqoscampus.html#wp1062179
From a QoS perspective, some of the relevant features of the C3560G/3750G/E include conditional trust, Per-Port/Per-VLAN policers (via Hierarchical QoS policies), DSCP-to-Queue mapping, 2Q3T or 1P1Q3T ingress queuing, and 4Q3T or 1P3Q3T egress queuing. Additionally, these platforms provide (minimally) 750 KB of receive buffers and (up to) 2 MB of transmit buffers for each set of 4 ports. These buffers can be allocated, reserved, or dynamically borrowed from a common pool, on a port-port, per-queue basis, depending on the administrative configurations chosen.
