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3Com Switch 8800 Configuration Guide Chapter 15 IP Performance Configuration
15-1
Chapter 15 IP Performance Configuration
15.1 Configuring IP Performance
IP performance configuration includes:
z Configuring TCP Attributes
15.1.1 Configuring TCP Attributes
TCP attributes that can be configured include:
z 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.
z 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.
z 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.
Table 15-1 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