Cisco CSS-11051-AC is a Content Services Switch (CSS) designed for high-performance load balancing and content switching in enterprise and data center environments. Part of the Cisco CSS 11000 Series, this appliance distributes network traffic across multiple servers, improving application availability, scalability, and performance. It was widely used for web hosting, application delivery, and server load balancing before modern ADC platforms.

? KEY FEATURES

• Application-aware load balancing (Layer 4–7 switching)
• 8 × Fast Ethernet ports
• Server load balancing and traffic distribution
• High availability and redundancy support
• SSL session handling (model dependent)
• Web, DNS, and application traffic optimization
• CLI-based management (Cisco CSS OS)

⚙️ TECHNICAL SPECIFICATIONS

? Hardware Platform

• Series: Cisco CSS 11000 Series
• Model: CSS-11051-AC
• Product type: Content switch / load balancer
• Form factor: 1U rack-mount

? Interfaces

• 8 × 10/100 Fast Ethernet ports
• 1 × console port
• 1 × management Ethernet port

⚡ Performance

• Layer 4–7 content switching
• High connection handling capacity (enterprise class for its generation)
• Optimized for HTTP, HTTPS, and application traffic

? Features

• Server load balancing (SLB)
• URL-based and application-aware routing
• Health monitoring of backend servers
• Session persistence (sticky sessions)
• Redundancy and failover support
• SSL offload (optional depending on configuration)

? Memory

• Embedded system memory for switching and session management
• Flash storage for configuration and OS

? Physical

• Form factor: 1U rack-mount
• Weight: ~5–7 kg
• Power: AC power supply (model: -AC)
• Operating temperature: 0°C to 40°C