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Web Cache Communication Protocol (WCCP) is a Cisco-developed content-routing protocol that provides a mechanism to redirect traffic flows in real-time. It has built-in load balancing, scaling, fault tolerance, and service-assurance (failsafe) mechanisms. Cisco IOS Release 12.1 and later releases allow the use of either Version 1 (WCCPv1) or Version 2 (WCCPv2) of the protocol. WCCP allows utilization of Cisco Cache Engines (or other caches running WCCP) to localize web traffic patterns in the network, enabling content requests to be fulfilled locally. Traffic localization reduces transmission costs and download time. == Protocol Versions == WCCPv1 * Only a single router services a cluster of systems * Supports HTTP (TCP port 80) traffic flows only * Provides generic routing encapsulation (GRE) to prevent packet modification * Routers and cache engines communicate to each other via a control channel based on UDP port 2048 WCCPv2 * Allows for use across up to 32 routers (WCCP servers) * Supports up to 32 engines/accelerators (WCCP clients) * Supports any IP protocol including any TCP or UDP * Supports up to 255 service groups (0-254) * Adds MD5 shared secret security 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Web Cache Communication Protocol (WCCP) is a Cisco-developed content-routing protocol that provides a mechanism to redirect traffic flows in real-time. It has built-in load balancing, scaling, fault tolerance, and service-assurance (failsafe) mechanisms. Cisco IOS Release 12.1 and later releases allow the use of either Version 1 (WCCPv1) or Version 2 (WCCPv2) of the protocol.WCCP allows utilization of Cisco Cache Engines (or other caches running WCCP) to localize web traffic patterns in the network, enabling content requests to be fulfilled locally. Traffic localization reduces transmission costs and download time.== Protocol Versions ==WCCPv1* Only a single router services a cluster of systems* Supports HTTP (TCP port 80) traffic flows only* Provides generic routing encapsulation (GRE) to prevent packet modification* Routers and cache engines communicate to each other via a control channel based on UDP port 2048WCCPv2* Allows for use across up to 32 routers (WCCP servers)* Supports up to 32 engines/accelerators (WCCP clients)* Supports any IP protocol including any TCP or UDP* Supports up to 255 service groups (0-254)* Adds MD5 shared secret security」の詳細全文を読む スポンサード リンク
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