Ip Performance Configuration Task List; Configuring Tcp Attributes; Configuring To Send Special Ip Packets To Cpu - H3C S7500 Series Operation Manual

Operation Manual – IP Address-IP Performance-IPX
H3C S7500 Series Ethernet Switches

2.2 IP Performance Configuration Task List

Complete the following tasks to configure IP performance:

Configuring TCP Attributes

Configuring to Send Special IP Packets to CPU

Configuring to Forward Layer 3 Broadcast Packets
2.3 Configuring TCP Attributes
Follow these steps to configure TCP attributes:
Enter system view
Configure timeout time for
the synwait timer in TCP
Configure timeout time for
the FIN_WAIT_2 timer in
TCP
Configure the socket
receiving/sending buffer
size of TCP
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:
Enter system view
Task
To do...
system-view
tcp timer syn-timeout
time-value
tcp timer fin-timeout
time-value
tcp window window-size
To do...
command...
system-view
Chapter 2 IP Performance Configuration
Use the command...
Use the
—
2-2
Remarks
Required
Required
Required
Remarks
—
Required
The default value is 75
seconds.
Required
The default value is 675
seconds.
Required
By default, the size of the
socket receiving and
sending buffers is 8 KB.
Remarks