Advanced protocol features

The appliance supports

Performance features of the emerging HTTP 1.1 protocol, such as persistent connections, request pipelining, and cache-control features.

A rich set of commands to optimize the performance of NNTP browsing, including support for RFC 977, such as the OVER, PAT, XREPLIC and NEXT/PREV commands, and all common extensions.

Caching of all NNTP data types and reception of news article feeds. See News article caching‚ on page 138.

FTP caching, Internet Cache Protocol (ICP) messaging, and the SNMP protocol for network management.

Fast kernel packet engine

The appliance contains a high-speed core TCP/IP network packet engine called the Adaptive Redirection Module (ARM). This packet engine supports high-speed interception of traffic for transparency, supports automatic bypass of sites that do not function properly with proxy caches, and efficiently streams data to the Intel NetStructure Cache Appliance. See Transparent proxy caching‚ on page 120 for more information.

High-availability

The Intel NetStructure Cache Appliance contains high-availability features that work together to increase reliability, minimizing the impact of hardware or software failures. The following sections describe these features.

Alarms

The appliance signals an alarm for any detected failure condition. Alarms are presented on the Manager UI, and can be configured to send email or page support personnel.

Pending alarms are indicated on the Dashboard of the Manager UI as a red lamp, as shown in Figure 10.

Appendix A Caching Solutions and Performance

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Intel 1520 manual High-availability, Alarms, Advanced protocol features, Fast kernel packet engine