Extreme Networks Px Series Dokumentacja Pobierz pdf (Strona 15)

Px Series Application Switch Installation and Configuration Guide 1-5

Load Balancing Modes

chosen to process the request, using a source IP address that is part of a proxy pool

inside the application switch.

After a connection is established between the application switch and the real server, the

application switch forwards the buffered data to the server. The server sends any

response to the application switch. The application switch translates the IP source

address and port numbers appropriately, along with the TCP sequence and

acknowledgment numbers, and then forwards the data to the real client on the Internet.

Return traffic from the real server does not require content analysis, and is simply

rewritten by the NAT engine.

Figure 3 illustrates the sequence used to establish a layer 7 request.

Figure 1-3: Establishing a layer 7 request

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 117 118

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Extreme Networks Px Series Dokumentacja Strona 15