Cisco ME-C3750-24TE-M Manual de usuario descargar pdf (Pagina 2)

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.

The Cisco Catalyst 3750 Metro Series supports an intelligent enhanced version of 802.1Q tunneling in which the

enterprise customer’s Layer 2 or Layer 3 QoS information can be mapped from the inner VLAN tag to the outer

service provider VLAN tag. As a result, the enterprise customer’s QoS priorities are used across the service

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Cisco ME-C3750-24TE-M Manual de usuario Pagina 2