
117358-A Rev. A 3-1
Chapter 3
Customizing TCP Services
This chapter describes how to customize TCP services on the router. It assumes
you have configured IP on an interface and started TCP using the default
parameters, as described in Chapter 1, and that you understand the TCP concepts
described in Chapter 2.
After you start TCP on the router, TCP default values are in effect for all TCP
parameters (see parameter descriptions in Appendix A). You customize TCP by
modifying these parameters as described in the following sections.
Setting Minimum Retransmission Timeout
You can specify a minimum value for the retransmission timeout. When one side
of a TCP connection sends a frame and does not receive an acknowledgment from
the other side of the connection within the timeout period, the sending station
retransmits the frame.
If you are transmitting on a high-speed network and you set the minimum
retransmission timeout value too high, network performance may degrade because
TCP must wait for the timeout period to elapse before retransmitting
unacknowledged data.
Topic Page
Setting Minimum Retransmission Timeout 3-1
Setting Maximum Retransmission Timeout 3-3
Setting Maximum Window Size (bytes) 3-4
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