Operation Manual – IP PerformanceH3C S9500 Series Routing Switches Chapter 1 IP Performance Configuration1-1Chapter 1 IP Performance ConfigurationWhen configuring IP performance, go to these sections for information you areinterested in:z Configuring IP Performancez Displaying and Maintaining IP Performancez Troubleshooting IP Performance1.1 Configuring IP PerformanceIP performance configuration includes:z Configuring TCP Attributesz Configuring the Switch Whether to Send a Time Exceeded ICMP Packet1.1.1 Configuring TCP AttributesTCP attributes include:z synwait timer: When sending the syn packets, TCP starts the synwait timer. Ifresponse packets are not received before synwait timeout, the TCP connection isterminated. The timeout of synwait timer ranges from 2 to 600 seconds and it is 75seconds by default.z finwait timer: When the TCP connection state turns from FIN_WAIT_1 toFIN_WAIT_2, finwait timer is started. If FIN packets are not received before finwaittimer timeout, the TCP connection is terminated. The timeout of finwait timerranges from 76 to 3600 seconds and it is 675 seconds by default.z The receiving/sending buffer size of the connection-oriented socket is in the rangefrom 1 to 32 KB and is 8 KB by default.Perform the following configuration in system view to configure TCP attributes:To do… Use the command…Configure timeout time for the synwaittimer in TCP tcp timer syn-timeout time-valueRestore the default timeout time of thesynwait timer undo tcp timer syn-timeoutConfigure timeout time for theFIN_WAIT_2 timer in TCP tcp timer fin-timeout time-valueRestore the default timeout time of theFIN_WAIT_2 timer undo tcp timer fin-timeoutConfigure the socket receiving/sendingbuffer size of TCP tcp window window-size
