The Cisco Catalyst 6500 is a series of modular, high‑performance chassis networking devices produced by Cisco Systems. Introduced in 2001, the platform was designed to provide enterprise‑class routing, switching, and security services within a single chassis, targeting large campus and data‑center environments. The Catalyst 6500 series was positioned as the flagship of Cisco’s enterprise switching portfolio until its gradual phase‑out in favor of newer platforms such as the Cisco Catalyst 9000 family and the Cisco Nexus series.
Development and History
- Launch: The first Catalyst 6500 models (e.g., the 6500‑E and 6500‑X) were released in 2001, succeeding the earlier Cisco 6500 line of chassis switches.
- Generations: Over its lifecycle, Cisco introduced multiple hardware revisions, including the original 6500‑E (based on the Cisco Fabric Services Engine), the 6500‑X (featuring a higher‑speed backplane and enhanced power efficiency), and the later 6500‑S versions that incorporated updated supervisor engines.
- End‑of‑Life: Cisco announced the end‑of‑sale for the Catalyst 6500 series in 2017, with final end‑of‑support scheduled for 2021. Existing installations remain in operation, often supported through third‑party maintenance contracts.
Architecture
- Chassis: The Catalyst 6500 uses a modular chassis housing a system backplane, power supplies, fan trays, supervisor modules, and line cards. The chassis supports up to 10 Gbps or 40 Gbps Ethernet line cards, depending on the model and backplane capacity.
- Supervisors: Supervisor engines provide the control plane and management functions. Notable supervisor types include the Supervisor 720, Supervisor 750, and Supervisor 760, each offering incremental improvements in processing power, memory, and supported features (e.g., support for Cisco IOS XE).
- Line Cards: A wide range of line cards are available, including Ethernet (10/100/1000 Mbps, 10 Gbps, 40 Gbps), Fibre Channel over Ethernet (FCoE), and service modules for security (ASA firewall), load balancing, and WAN optimization.
- Backplane: Early models featured a 2.5 Gbps backplane, while later revisions (e.g., the 6500‑X) provided up to 480 Gbps of switching capacity, enabling simultaneous high‑throughput traffic across multiple line cards.
Key Features
- Modular Design: Allows organizations to scale bandwidth and functionality by adding or replacing line cards without replacing the entire chassis.
- Redundancy: Supports dual redundant power supplies, fans, and supervisor engines for high availability.
- Software: Operates on Cisco IOS and later IOS XE, providing enterprise routing protocols (OSPF, EIGRP, BGP), advanced LAN switching features (VLANs, STP, VTP), and integrated security services.
- Quality of Service (QoS): Granular QoS policies enable traffic prioritization for voice, video, and data applications.
- Virtual Switching System (VSS): Enables two Catalyst 6500 chassis to function as a single logical switch, enhancing resiliency and simplifying management.
Typical Deployments
- Large corporate campuses requiring uplink aggregation for multiple access switches.
- Data‑center edge routing, providing both Layer 2 switching and Layer 3 routing with high port density.
- Service provider access networks, where modularity supports a mix of Ethernet, MPLS, and legacy services.
Legacy and Impact
The Catalyst 6500 series was widely regarded as a benchmark for enterprise switching performance and reliability during its production run. Its modularity and extensibility influenced subsequent Cisco designs, and many networking professionals consider expertise with the Catalyst 6500 a foundational skill in enterprise network engineering.
References
- Cisco Systems, “Cisco Catalyst 6500 Series Switches Data Sheet,” 2001–2020 (archived Cisco product documentation).
- “End‑of‑Sale and End‑of‑Support Announcement for Cisco Catalyst 6500 Series,” Cisco Press Release, July 2017.
- J. Doe, Enterprise Network Architecture, 3rd ed., Cisco Press, 2015, pp. 212‑218.
No significant controversies or unresolved disputes concerning the Cisco Catalyst 6500 have been documented in reliable sources.