tcp-mss (Interfaces)
Syntax
tcp-mss tcp-mss;
Hierarchy Level
[edit dynamic-profiles name interfaces name unit name family inet], [edit dynamic-profiles name interfaces name unit name family inet6], [edit dynamic-profiles name logical-systems name interfaces name unit name family inet], [edit dynamic-profiles name logical-systems name interfaces name unit name family inet6], [edit interfaces name unit name family inet], [edit interfaces name unit name family inet6]
Description
Enable and specify the TCP maximum segment size (MSS) in bytes for transit packets in the specified protocol family. The TCP MSS value must be lower than the MTU of the interface.
When the device receives a TCP packet with the SYN bit and MSS option set, it examines
the MSS value. If the MSS option specified in the packet is larger than the MSS you
configured with the tcp-mss statement, the router replaces the MSS
value in the packet with the lower value you configured.
You cannot configure TCP MSS on service interfaces (ms, vms, or ams).
This configuration statement is for transit packets. To adjust the TCP MSS for host-originated packets, see tcp-mss (Protocols BGP).
Options
| bytes |
TCP MSS value for SYN packets with a higher MSS value set.
|
Required Privilege Level
system—To view this statement in the configuration.
system-control—To add this statement to the configuration.
Release Information
Statement introduced before Junos OS Release 21.1R1.