The Cisco CSS 11501, 11503 and Cisco CSS 11506 content services switches are both modular platforms with interchangeable modules. The CSS 11503 and CSS 11506 may also share memory, disks, and gigabit interface converters (GBICs). The Cisco CSS 11501 has fixed memory and does support the same disks and Small Form-Factor Pluggable GBICs as the other two models. The Cisco CSS 11506 requires at least one switch control module (SCM) and may be configured with a second in standby mode. With the required SCM in one slot, the CSS 11506 has five additional slots supporting any combination of I/O, Secure Sockets Layer, or session accelerator modules. The Cisco CSS 11503 requires an SCM and accommodates any two of the other optional modules.

Features

•  It improves application and site availability and transaction integrity by introducing Adaptive Session Redundancy (ASR), an industry standard in stateful failover.
• It delivers the greatest flexibility of any content switch in its class for customizing combinations of ports, performance, and services.
• It scales secured application transaction performance through support of an integrated, high-capacity Secure Sockets Layer (SSL) module. Off-loading SSL onto the network improves the overall performance of the web and application server enabling better application performance.
•  It provides an integrated high-capacity web application (Hypertext Transfer Protocol, HTTP) compression module. Web application (HTTP) compression improves application response time by 20 to 50%, off-load the compression from the server, which reduces server workload, and decreases the traffic traversing wide area networks (WANs), which reduces bandwidth requirements and improves overall application response times; improving productivity.
• The Cisco CSS modular design protects investments by enabling upgrades of performance, ports, and services to meet your current and future application demands.