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verification, and configuration management, resulting in increas ed 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 confi gured:
Layer 2 connectivity management
Ethernet LMI for the customer edge
● Metro Ethernet OA&M:
Debugging hierarchy of Ethernet networks
Layer 2 service performance monitoring
● 802.1agCFM:
Standard that uses domains to contain OA&M flows and bound OA&M 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
Cisco 890 Series Routers enable customers to deliver high-performanc e, high-availability, mission-critical
business applications (Figure 5). The Cisco IOS Software universal image with Advanced IP Services feature
license (default) offers basic and advanced routing capabilitie s to deliver failover protection and load balancing.
These capabilities include Virtual Router Redundancy Protocol (VRRP) (RFC 2338), Hot Stan dby Router Protocol
(HSRP), MultigroupHSRP (MHSRP), and dial backup with external modem through a virtual auxiliary port. Cisco
890 Series Routers are integrated with ISDN BRI (892, 896, and 897 models), a V.92 ana log modem (891 model),
or a GigabitEthernet port for a secondary WAN backup connec tion. If the primary Ethernet-access WAN is
disconnected, the router detects this failure and fails over to the secondary backup WAN.