Cisco ME-C3750-24TE-M Manual de usuario descargar pdf (Pagina 7)

IP Service Level Agreement (IP SLA)

Cisco IOS Software IP SLAs help enable customers to assure new business-critical IP applications, as well as IP

services that utilize data, voice, and video. With Cisco IOS Software IP SLAs, users can verify service guarantees,

increase network reliability by validating network performance, proactively identify network issues, and increase

return on investment (ROI) by easing the deployment of new IP services. Cisco IOS Software IP SLAs use active

monitoring to generate traffic in a continuous, reliable, and predictable manner, thus facilitating the measurement

of network performance and health.

The IP SLA for Metro-Ethernet feature provides the capability to gather Ethernet layer network performance

metrics. This feature integrates Cisco IOS Software IP SLAs with the Ethernet Connectivity Fault Management

(CFM) feature. Available statistical measurements for the IP SLAs Ethernet operation include round-trip time, jitter

(interpacket delay variance), and packet loss.

Resilient Ethernet Protocol

Resilient Ethernet Protocol (REP) is a Cisco proprietary protocol that provides an alternative to Spanning Tree

Protocol to control network loops, handle link failures, and improve convergence time. REP is designed to meet

service providers’ requirement for a fast and predicable reconvergence solution for Layer 2 networks. In addition,

REP also supports VLAN load balancing to provide efficient utilization of redundant links. To interoperate with

devices not supporting REP, the edge no neighbor feature makes it possible to achieve fast convergence of

Carrier Ethernet networks even when the REP ring is terminated into a non REP-capable switch.

Applications

VPNs allow customers at different locations to exchange information through a service provider network, without

requiring private connections. The Cisco Catalyst 3750 Metro Series is ideal for service provider Metro Ethernet

access deployments, allowing providers to offer Layer 2 or Layer 3 VPN services to their enterprise or commercial

customers. Typically, Cisco Catalyst 3750 Metro Series Switches are installed in a building basement serving

many customers in the building or at the customer premises as the customer-located equipment (CLE).

Figure 2 shows a deployment example using the Cisco Catalyst 3750 Metro Series for Layer 2 VPN service.

Figure 2. Layer 2 VPN on the Cisco Catalyst 3750 Metro Series

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Cisco ME-C3750-24TE-M Manual de usuario Pagina 7