Command Reference Guide

3Com Router 5000 Family and Router 6000 Family tcp mss ● 265
Command Reference
tcp mss
Purpose Use the tcp mss command to designate a value as a threshold for TCP packets to be
fragmented.
Use the undo tcp mss command to prevent TCP packets from being fragmented.
Syntax tcp mss value
undo tcp mss
Parameters Value
The threshold for the TCP packet to be fragmented.
Valid values are 128 to 2048.
Default By default, TCP packets are not fragmented.
Example Configure the threshold of TCP packet fragmentation to be 300.
[3Com-Ethernet0/0/0] tcp mss 300
View This command can be used in the following views:
■ Interface view
Description Since the default MTU of the interface is 1500 bytes, this restricts the total length of
encryption packet head + data link expenditure + IP packet head
+ TCP packet to 1500 bytes. The dear length of TCP packets to fragment may be
about 1200 bytes.