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Elektronik Bilgi Kütüphanesi



Data Sheet
© 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 4 of 13
Metro Ethernet Connectivity
Cisco 890 Series routers are ideal for service provider deployments as Metro Ethernet customer
premises equipment (CPE). Cisco 891 and 892 Integrated Services Routers include two onboard
WAN interfaces, one Gigabit Ethernet WAN port, and one Fast Ethernet WAN port to support the
high-bandwidth demands of Metro Ethernet deployments. The router also provides failover
protection and load balancing. The 8-port managed switch provides enough LAN ports for
connecting multiple devices, and the optional PoE capability can supply power to IP phones or
other devices. The Cisco 890 Series provides significant value to customers by simplifying
deployment of Ethernet WAN services with end-to-end OAM, SLA monitoring and verification, and
configuration management, resulting in increased operational efficiency and reduced operating
expenses (OpEx).
The following Metro Ethernet features are supported for the Cisco 890 Series:
E-LMI: Basic configuration for detection and isolation of connectivity in the Metro Ethernet
network
E-LMI: Automated configuration of customer edge based on profiles configured:
Layer 2 connectivity management
Ethernet LMI for the customer edge
Metro Ethernet OAM:
Debugging hierarchy of Ethernet networks
Layer 2 service performance monitoring
802.1ag CFM:
Uses domains to contain OAM flows and bound OAM responsibilities
802.3ah: Ethernet in the First Mile (EFM)
Three types of packets: Continuity Check, Layer 2 Ping, and Layer 2 Traceroute
IP SLA for Ethernet
Figure 4 shows a Typical Small Branch-Office Metro Ethernet Deployment
Figure 4. Typical Metro Ethernet Deployment (Two-box Solution with Media Converters)