Cisco Catalyst 3750 Metro Switch DC Power Supply (spare) PWR-ME3750-DC= Hoja De Datos
Los códigos de productos
PWR-ME3750-DC=
Data Sheet
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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The ES ports support enhanced features such as bidirectional Hierarchical QoS and Traffic
Shaping, intelligent 802.1Q tunneling, VLAN translation, MPLS, EoMPLS, and H-VPLS. These
ports can serve as uplinks to metro aggregation points, including the Cisco Catalyst 4500 and
6500 Series Switches and the Cisco 7600 Series Routers, and provide greater intelligence at the
network edge.
Cisco Catalyst 3750 Metro Series Switches are shipped with the Metro IP Base Software license.
The license includes Layer 2 switching and basic routing such as static routing, Routing
Information Protocol (RIP), intelligent 802.1Q tunneling, VLAN translation, and bidirectional
hierarchical QoS.
For greater service breadth and network flexibility, Cisco Catalyst 3750 Metro Series Switches offer
additional software feature licenses that provide a cost-effective “pay-as-you-grow” service
upgrade path. With the software feature license options on the Cisco Catalyst 3750 Metro Series,
service providers are able to maximize the return on investment (ROI) for their Metro Ethernet
networks by adding features as their profitability increases and service offerings expand.
Industry Standard Services
Carrier Ethernet is a huge growth area for emerging connectivity services. It is a comparatively
simple, cost-effective, and familiar technology whose migration to the WAN will lead to more
flexible network connectivity while reducing overall IT costs. However, its deployment is
constrained by a shortage of global standards that provide assurance that equipment from
different vendors will interoperate. In order to accelerate the adoption of Carrier Ethernet services
and technology worldwide, service providers asked the Metro Ethernet Forum (MEF) to initiate a
certification program to assure them and their customers that products are compliant with MEF
specifications. The Cisco Catalyst 3750 Metro Series is certified to MEF 9 and 14 to support
industry-standard Layer 2 services and QoS features.
Gigabit Ethernet
With more and more applications demanding higher bandwidth, both enterprise and residential
customers are starting to demand access speeds greater than 100 Mbps. To address this
requirement, the Cisco Catalyst 3750 Metro Series offers wire-speed Gigabit Ethernet with all the
Metro Ethernet functionalities using the Gigabit Ethernet SFP ports. At speeds of 1000 Mbps,
Gigabit Ethernet provides the bandwidth to meet new and evolving network demands, alleviate
bottlenecks, and boost performance while protecting the existing infrastructure investments.
Layer 2 and Layer 3 VPN Services (Through Enhanced Services Ports)
Layer 2 VPN Using Enhanced 802.1Q Tunneling
802.1Q tunneling enables service providers to create a Layer 2 VPN service, often called Layer 2
transparent LAN services (TLS) or Ethernet LAN services, by using a VLAN-in-VLAN hierarchy and
tagging the tagged packets. With 802.1Q tunneling, service providers can clearly separate their
networks from their enterprise and commercial customer networks. Customer VLAN IDs are
preserved, and traffic from different customers is segregated within the service provider
infrastructure, even when they appear to be on the same VLAN. As a result, enterprise customers
subscribing to the Layer 2 VPN can transparently send and receive traffic from other metropolitan
sites through the service provider network as though the sites were within the same corporate
LAN.