Command Reference
TCP Commands
Defaults
This function is disabled by default.
Command
Mode
Global configuration mode
Usage Guide
Based on RFC1191, the TCP path MTU function improves the network bandwidth utilization and data
transmission when the user uses TCP to transmit the data in batch.
Enabling or disabling this function takes no effect for existent TCP connections and is only effective
for TCP connections to be created. This command applies to only IPv4 TCP. This function is enabled
for IPv6 TCP constantly and cannot be disabled.
According to RFC1191, after discovering the PMTU, the TCP uses a greater MSS to detect the new
PMTU at a certain interval, which is specified by the parameter
age-timer
. If the PMTU discovered is
smaller than the MSS negotiated between two ends of the TCP connection, the device will be trying to
discover the greater PMTU at the specified interval untill the PMTU value reaches the MSS or the
user stops this timer. Use the parameter
age-timer infinite
to stop this timer.
Configuration
Examples
The following example enables PMTU discovery.
Ruijie(config)# ip tcp path-mtu-discovery
Related
Commands
Command
Description
show tcp pmtu
Shows the PMTU value for the TCP
connection.
Platform
Description
N/A
11.4 ip tcp send-reset
Use this command to enable the device to send the reset packet when receiving the TCP port
unreachable packet. Use the
no
form of this command to disable this function,
ip tcp send-reset
no ip tcp send-reset
Parameter
Description
Parameter
Description
N/A
N/A
Defaults
This function is enabled by default.
Command
Mode
Global configuration mode
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