CISCO WAAS ARCHITECTURE HARDWARE AND SIZING PDF

Table 4. DRE can provide up to compression depending on the data being examined. These features improve end-user application response times, significantly improving employee productivity. The wizard includes defaults for faster deployment. Diagnostic and troubleshooting tools help reduce mean time to resolution MTTR.

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For the branch 2 topology, the option of a router with the integrated switch is somewhat impractical for scalability, and is shortsighted in capacity planning, being limited to the number of wired branch clients.

Integrating the wireless module within the ISR does not accommodate any switchports. Therefore, it is not very practical to have switchports integrated, unless the branch office is smaller than 16 clients or perhaps is configured so that all the clients are wireless. WAN Services A number of branch profiles are available, generally based on size and complexity of the branch as well as the campus head end and the number of branches that it must service.

Although the true roundtrip-time RTT for an application includes latency from the application client and servers as well as the LAN infrastructures, this document scopes the delay to the WAN edges. Both bandwidth and delay factors can be combined into a quantified value by which to measure the maximum amount of data that can be transferred over a WAN at a point in time.

It can be seen as the storage capacity for data in transit over the WAN. This implies that for using the full T1 link with a 60 millisecond delay, the WAN can accommodate approximately 12 KB of data in transit at any point in time.

This is related to how TCP does windows scaling. MSS determines the maximum amount of data that can be in transit and unacknowledged at any given time. Wide area file services are also affected by the BDP and need to be tuned for its established sockets to be used most effectively.

In a low connection count scenario, use the defaults or if too low compared to the calculated BDP, use 4xBDP instead up to the maximum buffer size allowed. For more information, see the WAAS 4. MPLS offers the benefits of service provider management for dynamic any-to-any site tunneling, QoS, and service-level agreements. While MPLS tunneling offers some measure of security, the tunnel itself is not encrypted.

Some enterprises do not consider MPLS tunneling by itself secure enough for their data, and additionally opt for establishing encrypted tunnels between the branch and data center. More about these tunnels are discussed in Secure Connectivity. This configuration was validated and tested with the results in the appendices of this document.

As long as the service provider meets the contracted service levels, the packets received at remote branches reflect the scheduling policies of the hub router sometimes referred to as a WAN aggregator. The WAN aggregator controls not only campus-to-branch traffic, but also branch-to-branch traffic which is homed through the hub.

For a full-mesh design, QoS should equally be configured in all branch routers. For the branch, note that the WAN link is one of the major criterion for choosing which model is appropriate:.

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For the branch 2 topology, the option of a router with the integrated switch is somewhat impractical for scalability, and is shortsighted in capacity planning, being limited to the number of wired branch clients. Integrating the wireless module within the ISR does not accommodate any switchports. Therefore, it is not very practical to have switchports integrated, unless the branch office is smaller than 16 clients or perhaps is configured so that all the clients are wireless. WAN Services A number of branch profiles are available, generally based on size and complexity of the branch as well as the campus head end and the number of branches that it must service. Although the true roundtrip-time RTT for an application includes latency from the application client and servers as well as the LAN infrastructures, this document scopes the delay to the WAN edges.

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Cisco WAAS Architecture, Hardware, and Sizing

Kigakasa This module is not capable of running waaz advanced services enabled by the Enterprise license discussed later in the chapterincluding application layer acceleration or disk encryption. The Cisco WAAS appliance family is designed to be deployed in a location of any size, including the small branch office, campus networks, or the largest of enterprise data center networks. 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. See All Related Articles.

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