H3C Technologies H3C S3100 Series Switches - Manual (Page 110)

Operation Manual – IP Address and Performance Confiugration
H3C S3100-52P Ethernet Switch Chapter 2 IP Performance Configuration
2-1
Chapter 2 IP Performance Configuration
2.1 IP Performance Configuration
2.1.1 Introduction to IP Performance Configuration
IP performance configuration mainly refers to TCP attribute configuration. The TCP
attributes that can be configured include:
z
synwait timer: This timer is started when TCP sends a syn packet. If no response
packet is received before the timer times out, the TCP connection will be
terminated. The timeout time of the synwait timer ranges from 2 to 600 seconds
and is 75 seconds by default.
z
finwait timer: This timer is started when the TCP connection turns from the
FIN_WAIT_1 state to the FIN_WAIT_2 state. If no FIN packet is received before
the timer times out, the TCP connection will be terminated. The timeout time of the
finwait timer ranges from 76 to 3,600 seconds and is 675 seconds by default.
z
The connection-oriented socket receive/send buffer size ranges from 1 to 32 KB
and is 8 KB by default.
2.1.2 Introduction to FIB
Every switch stores a forwarding information base (FIB). FIB is used to store the
forwarding information of the switch and guide Layer 3 packet forwarding.
You can know the forwarding information of the switch through the FIB table. Each FIB
entry includes: destination address/mask length, next hop, current flag, timestamp, and
outbound interface.
When the switch is running normally, the contents of the FIB and the routing table are
the same. For routing and routing tables, refer to the “Routing Protocol” module of this
manual.
2.1.3 TCP Attributes Configuration
Table 2-1
Configure TCP attributes
Operation Command Description
Enter system view
system-view
—
Configure timeout time for
the synwait timer in TCP
tcp timer syn-timeout
time-value
Required
By default, the timeout
time of the TCP
synwait timer is 75
seconds.