Please refer to WAAS sizing guidelines to size specific to customer requirements. * NME Hardware Assist for Enterprise Class Virtual. Blades . TCP Proxy architecture provides LAN-like TCP behavior and provides higher levels of. Cisco WAN Optimization is an architectural solution comprising a set of tools and techniques that work together in a Table 1 – Cisco WAAS Central Manager sizing options. Device .. of the chosen hardware form-factor. All connections are . Independent Computing Architecture (ICA) Acceleration Charts Disks- 5 (RAID-5) is implemented in WAAS as a hardware feature. RAID-5 devices can . Complete the sizing phase that includes the following tasks.
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These include disk encryption, Central Management Subsystem CMSinterface manager, reporting facilities, network interception and bypass, cidco traffic policy ATP engine, and kernel-integrated virtualization services, as shown in Figure This can be coupled with a configuration that applies a specific DSCP marking to the packets within the flow.
Summary > Cisco WAAS Architecture, Hardware, and Sizing
This license dictates what features are permitted to be configured on the device. Each WAAS appliance has expansion slots to support one or more additional feature cards, such as the inline bypass adapter, which has two two-port fail-to-wire pairs. The ATP is consulted only during the establishment of a new connection, which is identified through the presence of the TCP synchronize SYN flag which occurs within the first packet of the connection.
See All Related Articles. The ATP is responsible for examining details of each incoming flow after being handled by the interception and bypass mechanisms in an attempt to identify the application or protocol associated with the flow. Having a compact flash card enables the device to remain accessible on the network should the device suffer arcihtecture drive subsystem failure for troubleshooting and diagnostics purposes in such a scenario, optimization and virtualization services would not be operational.
All relevant configuration, management, monitoring, and troubleshooting subsystems are made accessible directly through this CLI as opposed to exposing the Linux shell. Should a WAAS device be physically compromised or a disk stolen, power is removed from the device, which destroys the copy of the key in memory memory is not persistent.
The ATP arcitecture discussed in the next section, and Chapter 8 and Chapter 9 discuss the configuration and management of policies.
Cisco WAAS Architecture, Hardware, and Sizing
WAAS devices configured with the Transport license cannot provide Enterprise license features including application-acceleration capabilities, disk encryption, or any other features provided by other licenses. This section examines the specifics of awas of the current and legacy hardware platforms and positioning of each. The Cisco Linux platform hosts a command-line interface CLI shell similar to that of Cisco IOS Software, which, along with the Central Manager and other interfaces, form the primary means of configuring, managing, and troubleshooting a device or system.
WAE appliance models and architfcture, along with WAVE appliance models, andare targeted toward branch office deployments, whereas the WAE appliance models, are targeted toward regional office and data center deployments.
Cisco WAAS Architecture, Hardware, and Sizing > Cisco WAAS Product Architecture
The Cisco WAAS router-integrated network modules are designed to provide optimization services for the remote branch office or enterprise edge. This is harfware in a single policy, thereby simplifying overall system policy management. Chapter Description This chapter provides an introduction to the Cisco WAAS hardware family, along with an in-depth examination of the hardware and software architecture.
The Cisco Wide-Area Application Engine family includes three network modules for the Integrated Services Router and six appliance models spanning two hardwafe models and four rack-mount appliance models. In either configuration, the WAE can provide full WAN optimization and application acceleration capabilities, but does not support virtualization.
Cisco Linux provides an interface for the Cisco WAAS software to use for purposes of monitoring and generating alarms. See All Related Articles. Settings configured in the policy are employed in conjunction with one another. As flows are intercepted by the WAAS device and determined to be candidates for optimization, those flows are handed to the Application Traffic Policy ATP engine to identify what level of optimization and acceleration should be applied based on the configured policies and classifier matches.
Router-Integrated Network Modules The Cisco WAAS router-integrated network modules are designed to provide optimization services for the remote branch office or enterprise edge. It also looks at the licensing options for Cisco WAAS, positioning for each of the hardware platforms, and performance and scalability metrics for each of the platforms. WAE devices provide only WAN optimization and application acceleration and do not provide virtualization.
The Cisco WAVE model WAVE is a single-processor desktop model that is designed for deployment in small- and medium-sized branch office locations or small data center locations. This module is not capable of running the advanced services enabled by the Enterprise license discussed later in the chapterincluding application layer acceleration or disk encryption.
Chapter Description This chapter provides an introduction to the Cisco WAAS hardware family, along with an in-depth examination of the hardware and software architecture. The distinction between the two is that a WAVE device, available only as an appliance, can also provide branch office virtualization services in conjunction with WAN optimization and application acceleration.
This chapter also looks at the licensing options for Cisco WAAS, positioning for each of the hardware platforms, and performance and scalability metrics for each of the platforms. Hardware Family Next Section. The interface manager also provides management over logical interfaces that can be configured over physical interfaces. If a WAAS device is not able to retrieve its key from the Central Manager during boot time, it remains in pass-through mode until connectivity is restored or disk encryption is administratively bypassed.
The ATP also notes the application group to which the classifier belongs to route statistics gathered to the appropriate application group for proper charting visualization and reporting. When a classifier hardwaer is found, the ATP examines the policy configuration for that classifier to determine how to optimize the flow.
The disk encryption feature uses AES encryption, the strongest commercially available encryption, and keys are stored only in the WAAS device memory after they have been retrieved from the Central Manager during the device boot process. The reason for this level of configurability is the unique position of the WAE, which can be used for branch offices and data centers of virtually any size.
The NME-WAE can be configured with the Enterprise license, providing full WAN optimization functionality, application acceleration functionality, and other features enabled by the Enterprise license including disk encryption and NetQoS integration. Sample Chapter is provided courtesy of Cisco Press.
The Cisco WAVE model WAVE is a single-processor desktop model that is designed for deployment in small and medium-sized branch office locations or small data center locations. Flows that do not have a match with an existing classifier are considered “other” traffic and are handled according to the policy defined for other traffic, which indicates that there are no classifier matches and that the default policy should be used.
Sizing of a Cisco WAAS solution requires consideration of a number of factors, including network conditions WAN bandwidth and LAN throughputnumber of users and concurrent optimized TCP connections, disk capacity and compression history, memory, concurrently connected peers, and virtualization requirements. The list of configurable elements within a policy include the following:. By following the recommended guidelines for performance and scalability, a robust Cisco WAAS design can be realized, thereby allowing administrators to deploy the solution confidently to improve application performance over the WAN while enabling centralization and consolidation of costly infrastructure.