CLI Reference
TCP Configuration Commands
Usage
guidelines
MSS refers to the maximum size of the payload of a
TCP packet.
The TCP Path MTU (PMTU) is implemented as per
RFC1191. This feature can improve the network
bandwidth utilization ratio. When the user uses TCP to
transmit mass data, this feature can substantially
enhance the transmission performance.
When the client initiates a TCP session, it negotiates the
maximum payload of TCP packets through the MSS
option field of TCP SYN packet. The MSS value of
client's SYN packet implies the maximum payload of
TCP packets sent by the server, and vice versa.
Configuring this command on the interface will change
the MSS option of SYN packets received or sent by the
interface to the MSS value configured on the interface. It
is suggested to configure the same value on the ingress
interface and egress interface, or else the MSS option of
SYN packets going through the device will be changed
to the lower of two values configured.
This command actually changes the SYN packet
exchanged during establishing the TCP session. For
some versions, this command may also change the
SYN+ACK packet.
This command takes effect on the subsequently
established TCP session instead of the established TCP
session.
This command only applies to IPv4 TCP.
Examples
Ruijie(config-if)# ip tcp adjust-mss 1000
Related
commands
Command
Description
-
-
ip tcp mss
Use this command to configure the upper limit of MSS value. Use the
no
form of this command to remove the
configuration.
ip tcp mss
max-segment-size
no ip tcp mss
Parameter
description
Parameter
Description
max-segment-size
Upper limit of MSS value.
Range: 68-10000 bytes.
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