Avaya Configuring IP Utilities Uživatelský manuál stáhnout pdf (Strana 44)

Configuring IP Utilities

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The value you set for the maximum window size depends on how much memory

you need for services other than TCP. If you have a complicated configuration,

specify a low Max. Window Size value for TCP connections, since space is

limited. Systems with less involved configurations can support more TCP

connections and a higher maximum window size value.

If TCP consumes too much memory on the router, connections slow down or even

abort. TCP uses feedback mechanisms to indicate to clients when resources are

becoming scarce. However, if clients disregard this feedback, TCP has to break

connections. TCP attempts to monitor and break the connections consuming the

most memory, to maintain connections consuming less memory.

TCP and IP Service Users

TCP is the layer between IP and protocols running at higher layers in the network

hierarchy. Figure 2-1

shows a simple network architecture with four users of

TCP/IP services: data link switching (DLSw), Telnet, FTP, and BGP.

Figure 2-1. TCP Between IP and Clients

TCP

Telnet BGP

DLSw FTP

TCP0001A

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Avaya Configuring IP Utilities Uživatelský manuál Strana 44