With the Cisco Catalyst 4500 Series, a primary member of the comprehensive Cisco Metro Ethernet portfolio, network operators can extend control and intelligence to large and small sites at the MAN edge. The Cisco Metro Ethernet portfolio encompasses a variety of routing, switching, and optical products and a range of technologies, including IP/Multiprotocol Label Switching (MPLS), Ethernet, SONET/SDH, and dense wavelength-division multiplexing/coarse wavelength-division multiplexing (DWDM/CWDM). Cisco Systems offers network operators a flexible, service-oriented approach for delivering profitable and differentiated metropolitan and broadband services.
THE ETHERNET ADVANTAGE IN MANS
Because of the cost, speed, and flexibility advantages of Ethernet, service providers are looking to offer Metro Ethernet as a connectivity option to their business and residential customers. Enterprise customers are asking providers to standardize on Ethernet as the User-Network Interface (UNI) everywhere on their networks to reduce expenses. Ethernet is familiar to enterprise customers and their IT staffs. It can scale to deliver bandwidth up to 10 Gbps to support demanding applications, and its bandwidth can be tailored to deliver performance that meets the needs of specific business applications. Providers of residential Internet, voice over IP (VoIP), and video services can also take advantage of this flexibility using advanced security and rich quality of service (QoS) capabilities delivered on the Cisco Catalyst 4500 Series via sophisticated control features of Cisco IOS Software and specialized hardware. Whether in MAN access or aggregation, Ethernet technology offers the most effective transport for service requirements today and in the future. By offering Ethernet-based services that can support more advanced applications, service providers can differentiate their offerings from competitors, improve their profit margins, and improve their revenue potential over the long term.
The Cisco Catalyst 4500 Series provides Metro Ethernet edge networks optimal control, from managing network and subscriber security to service differentiation. The Cisco Catalyst 4500 Series delivers this control with the following:
• Integrated resiliency-Network downtime is minimized with redundant supervisor-engine capability (on the Cisco Catalyst 4507R and 4510R), software-based fault tolerance, and 1+1 power-supply redundancy across the Cisco Catalyst 4500 Series. Nonstop Forwarding (NSF) with Stateful Switchover (SSO) offers continuous data packet forwarding during switchover. With time-sensitive traffic, including voice and video, running over the Metro Ethernet edge network, integrated resiliency is essential for maintaining profitability.
• Sophisticated QoS-Integrated QoS and traffic-management capabilities based on Layers 2 through 4 classify and prioritize mission-critical and time-sensitive traffic based on 32,000 QoS policy entries. The Cisco Catalyst 4500 Series can shape and rate-limit bandwidth-intensive traffic with mechanisms such as input and output policers based on host, network, and application information. The QoS mechanisms are delivered without performance impact.
• Predictable performance-The Cisco Catalyst 4500 Series offers up to a 72-million packets per second (mpps) wire-speed forwarding rate in hardware for traffic in Layers 2 through 4. Switching performance is independent of the number of route entries, QoS mechanisms enabled, and active VLANs. MANs need to respond reliably to meet end customer service-level agreements (SLAs).
• Advanced network security-The Cisco Catalyst 4500 Series supports up to 32,000 wire-rate Layer 2 through 4 access-list entries, Dynamic Host Configuration Protocol (DHCP) interface tracker (option 82) for subscriber tracking, DHCP snooping to prevent malicious or misconfigured DHCP servers, and includes other advanced security capabilities such as user authentication, client security, and control plane policing.