3Com Switch 8800 Family Configuration Guide

11
IP PERFORMANCE CONFIGURATION
Configuring IP
Performance
IP performance configuration includes:
■ “Configuring TCP Attributes”
Configuring TCP
Attributes
TCP attributes that can be configured include:
■ synwait timer: When sending the syn packets, TCP starts the synwait timer. If
response packets are not received before synwait timeout, the TCP connection
is terminated. The timeout of synwait timer ranges from 2 to 600 seconds and
it is 75 seconds by default.
■ finwait timer: When the TCP connection state turns from FIN_WAIT_1 to
FIN_WAIT_2, finwait timer is started. If FIN packets are not received before
finwait timer timeout, the TCP connection is terminated. The timeout of
finwait timer ranges from 76 to 3600 seconds and it is 675 seconds by default.
■ The receiving/sending buffer size of the connection-oriented socket is in the
range from 1 to 32 KB and is 8 KB by default.
Perform the following configuration in System view.
Displaying and
Debugging IP
Performance
After the above configuration, execute the display command in any view to
display the running of the IP performance configuration, and to verify the effect of
the configuration.
Tab le 58 Configure TCP attributes
Operation Command
Configure timeout time for the synwait timer
in TCP
tcp timer syn-timeout time-value
Restore the default timeout time of the
synwait timer
undo tcp timer syn-timeout
Configure timeout time for the FIN_WAIT_2
timer in TCP
tcp timer fin-timeout time-value
Restore the default timeout time of the
FIN_WAIT_2 timer
undo tcp timer fin-timeout
Configure the socket receiving/sending buffer
size of TCP
tcp window window-size
Restore the socket receiving/sending buffer
size of TCP to default value
undo tcp window
Tab le 59 Display IP performance
Operation Command
Display TCP connection state display tcp status