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fragment-threshold (Forwarding Class Maps)


Hierarchy Level


For link services IQ (lsq) interfaces only, set the fragmentation threshold for an individual forwarding class.


If you do not include this statement, the fragmentation threshold you set at the [edit interfaces interface-name unit logical-unit-number] or [edit interfaces interface-name mlfr-uni-nni-bundle-options] hierarchy level is the default for all forwarding classes. If you do not set a maximum fragment size anywhere in the configuration, packets are fragmented if they exceed the smallest maximum transmission unit (MTU) of all the links in the bundle.


bytes—Maximum size, in bytes, for multilink packet fragments. Any nonzero value must be a multiple of 64 bytes.

  • Range: 128 through 16,320 bytes

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

Release Information

Statement introduced before Junos OS Release 7.4.