Cisco Wide Area Virtualization Engine 274 Troubleshooting Guide download pdf (Page 88)

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Cisco Wide Area Application Services Configuration Guide

OL-26579-01

Chapter 1 Configuring AppNav

Information About AppNav

• AppNav Controller Group (ANCG)—A group of AppNav Controllers within one service context

that together provide the necessary intelligence for handling asymmetric flows and providing high

availability. The ANCG is configured on the ANC. An ANCG can have up to eight ANCs.

• WAAS Node (WN)—A WAAS optimization engine (WAE or WAVE appliance, NME-WAE or

SM-SRE network module, or vWAAS instance, but not a WAAS Express device) that optimizes and

accelerates traffic according to the optimization policies configured on the device. You can have up

to 32 WNs in the service context. (In the CLI, a WAAS node is also known as a service node.)

• WAAS Node Group (WNG)—A group of WAAS nodes within a service context that services a

particular set of traffic flows identified by AppNav policies. The WNG is configured on the ANC.

You can have up to 32 WNGs in the service context. (In the CLI, a WAAS node group is also known

as a service node group.)

• AppNav Cluster—The group of all ANC and WN devices within a service context.

• Service Context—The topmost entity that groups together one AppNav Controller Group (ANCG),

one or more WAAS node groups (WNGs), and an associated AppNav policy. The service context is

configured on the ANC.

Figure 1-1 AppNav Solution Components

Within a service context, WAAS devices can operate in one of two modes:

• Application accelerator—The device serves only as a WN within the service context. It receives

traffic from the ANC, optimizes the traffic, and returns the traffic to the ANC to be delivered to its

destination. The WN can be any kind of WAAS device or vWAAS instance.

• AppNav Controller—The device operates as an ANC that intercepts network traffic and, based on a

flow policy, distributes that traffic to one or more WNs for optimization. Only a WAVE appliance

that contains a Cisco AppNav Controller Interface Module can operate as an ANC. An ANC can also

operate as a WN and optimize traffic as part of a WNG.

AppNav Controller Deployment Models

You can deploy AppNav Controllers in your network in two ways (see Figure 1-2):

AppNav

Distribution

Policy

Service Context

AppNav Cluster

AppNav Controller Group

ANC1 ANC2

WAAS Node Group 1

WN1

WN2

WAAS Node Group 2

WN3

WN4

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