11-3
[SwitchA-Vlan-interface3] ip address 1.1.1.2 24
[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-broadcast
z Configure Switch B
# Enable Switch B to receive directed broadcasts.
<SwitchB> 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 24
After the above configurations, if you ping the subnet broadcast address (2.2.2.255) of VLAN-interface
2 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 the
VLAN-interface 2 of Switch B.
Configuring TCP Optional Parameters
TCP optional parameters that can be configured include:
z synwait timer: When sending a SYN packet, TCP starts the synwait timer. If no response packet is
received 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 is
started. If no FIN packets is received within the timer interval, the TCP connection will be
terminated. If a FIN packet is received, the TCP connection state changes to TIME_WAIT. If a
non-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 buffer
Follow these steps to configure TCP optional parameters:
To do… Use the command… Remarks
Enter system view system-view —
Configure the TCP synwait
timer
tcp timer syn-timeout
time-value
Optional
75 seconds by default.
Configure the TCP finwait timer
tcp timer fin-timeout
time-value
Optional
675 seconds by default.
Configure the size of TCP
receive/send buffer
tcp window window-size
Optional
8 KB by default.
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