Configuring Tcp Attributes; Configuring The Tcp Send/Receive Buffer Size; Configuring Tcp Timers; Configuring Icmp To Send Error Packets - HP A5120 EI Series Configuration Manual

Configuring TCP attributes

Configuring the TCP send/receive buffer size

Follow these steps to configure the TCP send/receive buffer size:
To do...
Enter system view
Configure the size of TCP
send/receive buffer

Configuring TCP timers

You can configure the following TCP timers:
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.
finwait timer: When a TCP connection is changed into FIN_WAIT_2 state, the finwait timer is

started. If no FIN packet is received within the timer interval, the TCP connection is 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.
Follow these steps to configure TCP timers:
To do...
Enter system view
Configure the TCP synwait timer
Configure the TCP finwait timer
CAUTION:
The actual length of the finwait timer is determined by the following formula:
Actual length of the finwait timer = (Configured length of the finwait timer – 75) + configured length of
the synwait timer

Configuring ICMP to send error packets

Introduction

Sending error packets is a major function of ICMP. In case of network abnormalities, error packets are
usually sent by the network or transport layer protocols to notify corresponding devices so as to facilitate
control and management.
Use the command...
system-view
tcp window window-size
Use the command...
system-view
tcp timer syn-timeout time-value
tcp timer fin-timeout time-value
100
Remarks
—
Optional
8 KB by default.
Remarks
—
Optional
75 seconds by default.
Optional
675 seconds by default.