Chapter 7 | AppFlow |
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How AppFlow Works
In the most common deployment scenario, inbound traffic flows to a Virtual IP address (VIP) on the NetScaler appliance and is load balanced to a server. Outbound traffic flows from the server to a mapped or subnet IP address on the NetScaler and from the VIP to the client. A flow is a unidirectional collection of IP packets identified by the following five tuples: sourceIP, sourcePort, destIP, destPort, and protocol.
The following figure describes how the AppFlow feature works.
Figure 7-1. NetScaler Flow Sequence
As shown in the figure, the network flow identifiers for each leg of a transaction depend on the direction of the traffic.
The different flows that form a flow record are:
Flow1:
Flow2:
Flow3:
Flow4:
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