H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – IP Address-IP Performance-IPX
H3C S7500 Series Ethernet Switches Chapter 2
IP Performance Configuration
2-2
2.2 IP Performance Configuration Task List
Complete the following tasks to configure IP performance:
Task Remarks
Configuring TCP Attributes Required
Configuring to Send Special IP Packets to CPU Required
Configuring to Forward Layer 3 Broadcast Packets Required
2.3 Configuring TCP Attributes
Follow these steps to configure TCP attributes:
To do… Use the command… Remarks
Enter system view
system-view
—
Configure timeout time for
the synwait timer in TCP
tcp timer syn-timeout
time-value
Required
The default value is 75
seconds.
Configure timeout time for
the FIN_WAIT_2 timer in
TCP
tcp timer fin-timeout
time-value
Required
The default value is 675
seconds.
Configure the socket
receiving/sending buffer
size of TCP
tcp window window-size
Required
By default, the size of the
socket receiving and
sending buffers is 8 KB.
2.4 Configuring to Send Special IP Packets to CPU
Usually the switch sends TTL timeout packets and Unreachable packets to the CPU in
the process of forwarding IP packets. The CPU processes these special packets after
receiving them. Incorrect configuration and malicious attacks will cause heavy CPU
load. You can perform the following configuration to configure not to send
corresponding packets to the CPU in order to ensure normal running.
Follow these steps to configure to send special IP packets to CPU:
To do…
Use the
command…
Remarks
Enter system view
system-view
—