Hitachi GX1000-SMC013X, Instruction Manual

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Table 26-5 Default values of TCP session monitoring timer
TCP session status Meaning LAN side
timer
value
(seconds) WAN
side
timer
value
(second
s)
open
A session is in the process of being
established.(TCP session status
CLOSED
→
ESTABLISHED
)
300 300
rst-closing
An RST packet is received while a session is
being established. Waiting for the session to
transit to the state of
CLOSED
.
300 300
estab
After the establishment of a TCP session, waiting
to receive the next packet after the last packet is
received. (Includes a TCP keep-alive probe.) 8000 8000
close-rcvwait
After the establishment of a TCP session, a FIN
packet is received. Because the received data
packet is not complete, a request for
retransmission is sent. The device is waiting to
receive the remaining packet. 300 300
close-sndwait
After the establishment of a TCP session, a FIN
packet is received. Because the data packet
transmission is not completed, the device is
waiting for all the data packets to be sent. 300 300
close-ackfin
After the establishment of a TCP session, a FIN
packet is received, and it is sent to the partner.
The device is waiting to receive an ACK of FIN
packet. 300 300
close-closing
After the establishment of a TCP session, an
ACK of FIN packet is received for the sent FIN
packet. Waiting for the session information to be
deleted after the transition to the state of
CLOSED
. (Corresponds to 2 MSL timer)
300 300
Table 26-6 Default threshold values that output logs when conditions are satisfied
Item with threshold
value Log output condition Value for LAN Value for WAN
Minimum RTT value Minimum RTT value < RTT 0 milliseconds 3 milliseconds
Maximum RTT value Maximum RTT value > RTT 10 milliseconds 500
milliseconds
LOSS rate threshold
value Loss rate threshold value < packet
loss rate 3% 3%