1-3[SwitchA-Vlan-interface3] quit[SwitchA] interface vlan-interface 2[SwitchA-Vlan-interface2] ip address 2.2.2.2 24# Enable VLAN-interface 2 to forward directed broadcasts.[SwitchA-Vlan-interface2] ip forward-broadcastz Configure Switch B# Enable Switch B to receive directed broadcasts. system-view[SwitchB] ip forward-broadcast# Configure a static route to the host.[SwitchB] ip route-static 1.1.1.1 24 2.2.2.2# Configure an IP address for VLAN-interface 2.[SwitchB] interface vlan-interface 2[SwitchB-Vlan-interface2] ip address 2.2.2.1 24After the above configurations, if you ping the subnet broadcast address (2.2.2.255) of VLAN-interface2 of Switch A on the host, the ping packets can be received by VLAN-interface 2 of Switch B. However,if you disable the ip forward-broadcast command, the ping packets cannot be received by theVLAN-interface 2 of Switch B.Configuring TCP Optional ParametersTCP optional parameters that can be configured include:z synwait timer: When sending a SYN packet, TCP starts the synwait timer. If no response packet isreceived within the synwait timer interval, the TCP connection cannot be created.z finwait timer: When a TCP connection is changed into FIN_WAIT_2 state, the finwait timer isstarted. If no FIN packets is received within the timer interval, the TCP connection will beterminated. If a FIN packet is received, the TCP connection state changes to TIME_WAIT. If anon-FIN packet is received, the system restarts the timer upon receiving the last non-FIN packet.The connection is broken after the timer expires.z Size of TCP receive/send bufferFollow these steps to configure TCP optional parameters:To do… Use the command… RemarksEnter system view system-view —Configure the TCP synwaittimertcp timer syn-timeouttime-valueOptional75 seconds by default.Configure the TCP finwait timer tcp timer fin-timeouttime-valueOptional675 seconds by default.Configure the size of TCPreceive/send buffer tcp window window-size Optional8 KB by default.The actual length of the finwait timer is determined by the following formula:
