The Cisco Catalyst 3750 Metro Series switches are a new line of premier multilayer switches that bring greater intelligence to the metro Ethernet edge, enabling the delivery of more differentiated metro Ethernet services. Featuring hierarchical quality of service (QoS) and traffic shaping, intelligent 802.1Q tunneling, VLAN mapping, Multi-protocol Label Switching (MPLS) and Ethernet over MPLS (EoMPLS) support, and redundant AC or DC power, these switches are ideal for service providers seeking to deliver profitable business services, such as Layer 2, Layer 3, and MPLS VPNs, in a variety of bandwidths and with different service-level agreements (SLAs). With flexible software options, the Cisco Catalyst 3750 Metro Series offers a cost-effective path for meeting current and future service requirements from service providers serving enterprises and commercial businesses.(Excerpt from Cisco.com)