Configuration Guide Configuring FPM
2.3.7 Loose TCP Status Check
2.3.7.1 Working Principle
A complete handshake process is required for the establishment of a legitimate TCP connection. In some cases such as
active/standby switchover, however, probably a handshake process has been performed for the current TCP connection but
only no corresponding information exists. In such cases, the system requires only ACK packets. For this purpose, the FPM
provides loose TCP status check.
2.4 Configuration
Configuring the
Functions of the FPM
(Optional) It is used to manage FPM.
Ip session direct-trans-disable
Disables the function to transparently
transmit packets when the flow table is full.
Configures the flow entry aging time.
Configures the number of packets that can
be received for each flow in a certain status.
ip session tcp_state-inspection-enable
Enables the TCP status tracing function.
ip session track-state-strictly
Configures packet threshold for flows in
various states.
Enables the loose TCP status transition
check function.
2.4.1 Disabling Transparent Transmission of Packets When the Flow Table Is Full
2.4.1.1 Networking Requirements
For some special services such as network address translation (NAT) applied on wireless products, the FPM should not
allow the transparent transmission of packets without flow establishment.
2.4.1.2 Notes
Currently this function is available on wireless products only.
By default, packets can be transparently transmitted without flow establishment when the flow table is full.
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