Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?


allow-fragmentation (fti)


Hierarchy Level


For an encapsulated (UDP/GRE/IP-in-IP) tunnel, enable fragmentation of GRE-encapsulated packets whose size exceeds the maximum transmission unit (MTU) value of a link that the packet passes through. The don’t-fragment (DF) bit is not set in the outer IP header of encapsulated packets.


Don't Frafgment (DF) bit is set by default for the outer encapsulated IPv4 header.

Required Privilege Level


Release Information

Statement introduced in Junos OS Evolved Release 23.2R1.