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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The ATP is responsible for examining details of sizzing incoming flow after being handled by the interception and bypass mechanisms in an attempt to identify the application or yardware associated with the flow. The compact flash card is used for boot-time operation and configuration files, whereas the hard disk storage is used for optimization data including object cache and Data Redundancy Elimination [DRE]swap space, software image storage repository, and guest operating system storage in the case of WAVE devices.
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. With two drives, the system is configured automatically for software RAID This chapter provides an introduction to the Cisco WAAS hardware family, along with an in-depth examination of the hardware and software architecture.
This should not imply that the device characterization presented is fixed; devices should be placed in locations according to performance and scalability sizing and feature requirements. Performance and scalability metrics for each are examined later in this chapter, along with best practices around accurately sizing a Cisco WAAS deployment. The Cisco WAVE model WAVE is a single-processor desktop model that is designed for deployment in small- and hardwade branch office locations or small data center locations.
The WAE appliance models, andalong with WAVE appliance modeleach have externally accessible hard disk drives and RAID support some models support hot-swappable disk drives.
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. 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.
The configured policy dictates which optimization and acceleration components are enacted upon the flow and how the packets within the flow are handled. The WAAS VB architecture helps enable customers to further consolidate infrastructure by minimizing the number of physical servers required in the branch office for those applications which are not good candidates for centralization into a data center location.
About Affiliates Cisco Systems, Inc. Cisco WAAS also supports the definition of up to four syslog servers, which can be used as alarm recipients when syslog messages are generated. Cisco WAAS is a software component that is resident on a hardware device deployed at each location with users and servers. Return to Beginning Previous Section. Each network module has a single hard disk with capacity ranging from 80 to GB.
Cisco WAAS Architecture, Hardware, and Sizing
Licensing Next Section Previous Section. This section examines the specifics of each of the current and legacy hardware platforms and positioning of each. The WAE is a hybrid device that is commonly used for larger branch offices and those where virtualization is requiredbut works equally well as a data center device where virtualization is not used.
In addition, the ISR provides a strong foundation for application performance management APM solutions in that along with WAAS, other performance-related features can be configured, including quality of service QoS for network provisioning, Performance Routing PfR for optimal path selection and network utilization, and NetFlow for visibility into traffic distribution, throughput, and other metrics.
The Cisco WAE model WAE is a ciscl quad-core rack-mount system eight processors that is designed for deployment in the largest of enterprise data centers and under the most demanding conditions. Architectkre the hard disks are siziing, loss of the key renders data on the disk unusable and scrambled. This association is done by comparing the packet headers from archigecture flow against a set of predefined, administratively configured, or dynamic classifiers, each with its own set of one or more match conditions.
Each Cisco WAAS device, regardless of form factor, is configured with some amount of hard disk storage and a compact flash card.
Licensing > Cisco WAAS Architecture, Hardware, and Sizing
NOTE The WAE model is end-of-life and is not covered in this section; however, its performance and scalability metrics are covered in this chapter to support those who have already deployed these devices in their networks and wish to continue using them with WAAS v4. Sample Chapter is provided courtesy of Cisco Press. 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.
Hardware Family Sizjng Section.
The list of configurable elements within a policy include the following:. 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.
The ATP is discussed in the next section, and Chapter 8 and Chapter 9 discuss the configuration and management of policies. About Affiliates Cisco Systems, Inc. This can be coupled with a configuration that applies a specific DSCP marking to the packets within the flow. 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.
Sample Chapter is provided courtesy of Cisco Press. This breadth of portfolio provides customers with the flexibility necessary to allocate the right platform for each network location where WAN optimization, application acceleration, and virtualization capabilities are needed. 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. The Cisco WAAS router-integrated network modules are designed to provide optimization services for the remote branch office or enterprise edge.
Settings configured in the policy are employed in conjunction with one another.
Summary > Cisco WAAS Architecture, Hardware, and Sizing
Additionally, the increased memory configuration provides support for a greater amount of WAN bandwidth and optimized TCP connections. As of version 4. Both methods of integration and interception are discussed in Chapter 4. Aechitecture Chapter is provided courtesy of Cisco Press. 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.
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 network interception and bypass manager is used by the Cisco WAAS device to establish relationships with intercepting devices where necessary and ensure low-latency bypass of traffic that the WAAS device is not intended to handle.
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. 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.
Transaction logs are not covered in this book, but a full reference on their usage can be found in the Cisco WAAS documentation. Having a compact flash card enables the device to remain accessible on the network should the device suffer harwdare drive subsystem failure for troubleshooting and diagnostics purposes in such a scenario, optimization and virtualization services would not be operational. Chapter Description This chapter provides an introduction to the Cisco WAAS hardware family, along with an in-depth examination of the hardware jardware software architecture.